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This Is The Biggest Cause Of Insomnia

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A very common yet overlooked cause is putting too much effort into trying to get to sleep:

Via Dreamland: Adventures in the Strange Science of Sleep:

The cause is often the brain’s refusal to give up its unequaled ability to think about itself, a meta-phenomenon that Harvard professor Daniel M. Wegner has called “the ironic process of mental control.” To illustrate this concept, imagine someone telling you that you will be judged on how quickly you can relax. Your initial reaction most likely is to tighten up. After he posed that challenge to research subjects, Wegner found that the average person becomes anxious as his or her mind constantly monitors its progress toward its goal, caught up in the second-by-second process of self-assessment. In the same way, sleep becomes more elusive as a person’s sleep needs become more urgent. This problem compounds itself each night, leading to a state of chronic insomnia.

And Wegner demonstrated the theory with a study:

As predicted, subjects who had been told to fall asleep quickly took longer to do so. Their minds were so focused on falling asleep in record time that they found themselves consciously checking on their progress, unable to let their thoughts drift off and guide them to dreamland.

What's makes the irony that much deeper is that the people who are prone to this are those who value sleep the most.

They want it so bad that they struggle to get it, and the struggle stops them from achieving their goal:

Patients with insomnia tend to think that one night of poor sleep leads to immediate health problems or has an outsized impact on their mood the next day, a mental pressure cooker that leaves them fretting that every second they are awake in the middle of the night is another grain of salt in the wound. In the inverted logic of the condition, sleep is extremely important to someone with insomnia. Therefore, the person with insomnia can’t get sleep.

Very often people give advice like "when you stop trying so hard things work themselves out." I usually regard that perspective with great skepticism, but with insomnia it is very likely the case.

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Brain Study Shows Why Hoarders Can't Part With Their Junk

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Hoarders, or people who can't bear to throw away even the most useless of junk, often can't see that they have a problem. But now new research pinpoints that problem in the brains of these individuals.

A new study finds abnormal activity in brain regions of people with hoarding disorder who were asked to make decisions about keeping something versus tossing it. The brain regions involved are known to be involved with decision-making under uncertain conditions as well as risk assessment and emotional choices.

"Hoarding seems to be characterized by problems in the decision-making process that can be seen in patterns of brain activity," said David Tolin, the director of the anxiety disorders center at the Connecticut-based mental health center The Institute of Living.

The cluttered brain

People with hoarding disorder have been made famous by the A&E documentary series "Hoarders," which follows individuals as they struggle with debilitating amounts of clutter in their homes. People with hoarding disorder acquire lots of stuff and are psychologically unable to throw it away.

The drive to hoard has been linked with a number of other psychological impairments, from difficulty with attention to problems making decisions. As odd as it may seem given that many hoarders' homes are piled with junk and garbage, the disorder is associated with perfectionism, tied to a fear of making the wrong decision. [Top 10 Controversial Psychiatric Disorders]

Psychologists originally thought of hoarding as an offshoot of obsessive compulsive disorder, but more research and treatment experience have shown that the two disorders don't overlap nearly as often as assumed, Tolin told LiveScience. To find out what really goes on in a hoarder's brain, he and his colleagues used functional magnetic resonance imaging (fMRI) to examine the activity in the brain as 43 people with hoarding disorder were asked to make decisions about keeping items or throwing them away. The fMRI measures changes in blood flow to brain regions in real time, allowing scientists to determine which regions are more active during any given task.

For comparison, the researchers also scanned the brains of 33 healthy adults and 31 adults with obsessive compulsive disorder.

Keep or toss?

In each case, participants were asked to bring a pile of junk mail and newspapers from home without sorting through it. The researchers then showed the participants pictures of this junk paper while they were in the brain scanner, interspersed with photos of similar junk mail belonging to the research lab. Before each photo, the participants were shown a label stating whether the junk mail was theirs or the lab's. The participants were then asked whether the researchers should keep the mail and give it to the participant or whether they should shred it.

Unsurprisingly given their diagnosis, the hoarding disorder group discarded fewer pieces of junk paper and reported more anxiety, indecisiveness and sadness while making their choices than the other groups. Their brains told a more interesting tale: When asked to make a choice about their own mail, the hoarding participants saw a spike in activity in the anterior cingulate cortex and the left insular cortex.

The insular cortex is a section of brain that sits along each side of the head, folded deep within one of the organ's surface wrinkles. The anterior cingulate cortex is deep in the front of the brain.

Making decisions about their own junk sent these areas into overdrive in hoarder's brains. But when the hoarders made decisions about someone else's stuff, the same brain regions were unusually quiet.

Similarly, the insular cortex on the right side of the brain became more active when hoarders looked at their own mail than it did when they saw the lab's junk paper. Depression and OCD did not explain these brain differences.

Together, the insula and anterior cingulate cortex form a network that helps people decide how relevant and important things are, Tolin said.

"For us to make a good decision, you need a certain amount of activity in that network," he said. "Too little and you're not paying attention, you're under-stimulated. Too much and you're overwhelmed."

That's what seems to happen to hoarders, Tolin said. They're under-stimulated when confronting the vast amounts of junk and clutter that fill their homes. But when faced with a decision that matters to them, these brain regions go into overdrive, overwhelming them to the point where they can't make a choice at all.

"They avoid it because it's too painful," Tolin said. "And the clutter continues to build."

Tolin and his colleagues detail their findings today (Aug. 6) in the journal Archives of General Psychiatry.

Follow Stephanie Pappas on Twitter @sipappas or LiveScience @livescience. We're also on Facebook & Google+

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You Don't Need To Have Sex To Get HPV

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Even girls who have not had sexual intercourse are at risk for infection with human papillomavirus (HPV), a new study shows.

In the study, which involved teen girls and young women, 11.6 percent of those who had never had sexual intercourse were infected with at least one strain of HPV.

HPV is a sexually transmitted disease that is most commonly passed between people during vaginal or anal intercourse. But it can also be transmitted through genital-to-genital, or hand-to-genital contact, which is how the participants in the study likely got the virus, the researchers said. Out of the more than 40 sexually transmitted HPV strains, more than a dozen have been identified as cancer-causing, according to the National Cancer Institute.

HPV infections are usually transient, but can cause cervical cancer in some people if the infection lingers for long periods.

The findings support the recommendation to administer the HPV vaccine to girls ages 11 and 12, before many become sexually active, the researchers said. Doctors and parents should not delay HPV vaccination because a teen is not sexually active, they said.

"Even before kids have intercourse, they're being exposed to HPV," said study researcher Lea Widdice, an assistant professor of pediatrics at Cincinnati Children's Hospital. "Vaccination at 11 to 12 years old is not too early," Widdice said.

Because the study was conducted in just one community of mainly African American young women, further research is needed to see if the findings apply to the general population. A high percentage of the participants in the study had become sexually active or had sexual contact, and the prevalence of HPV may be lower in a group with different sexual behaviors, experts say.

One of Widdice's teammates receives funding from Merck, the company that manufactures the HPV vaccine Gardasil.

Teens and HPV

Widdice and colleagues analyzed information from 259 girls ages 13 to 21 who visited a clinic in Cincinnati and got their first HPV vaccination between 2008 and 2010. The majority of participants (78 percent) were African American, and 75 percent reported having public health insurance.

Participants were asked whether they had ever had sexual intercourse, or whether they had ever had sexual contact without intercourse. A swab was used to collected cell samples from the vagina and cervix (either by doctors or the participants themselves), and the samples were tested for HPV.

One hundred ninety participants (73 percent) were sexually experienced, and many had had multiple sexual partners; the average number of sexual partners was about six. Among sexually active participants, 133 (70 percent) tested positive for HPV.

Of the 69 participants who had not had sex, eight tested positive for HPV, two of whom had HPV-16, a high-risk type of HPV. (Most cervical cancers are caused by HPV-16 or HPV-18.)

Higher than expected

Eduardo Franco, a cancer epidemiologist at McGill University, in Montreal, said the percentage of girls in the study who tested positive for HPV and had not had sex was higher than he would have expected. But this may be because many of the girls in the group had had some type of sexual exposure, said Franco, who was not involved in the study.

It's not clear whether the HPV infections seen in this study were found in the vagina or in the cervix, Franco said. HPV infections in the cervix are more risky in terms of their cancer-causing ability, but would be less likely in those who have not had sexual intercourse, Franco said.

The vaccines currently available prevent both vaginal and cervical strains, though they must be given before the infection emerges. That said, women who have an HPV infection in the vagina would still be protected against the cervical kind if they then get the HPV vaccine, Franco said.

(Gardasil protects four strains of HPV, while the vaccine Cervarix, manufactured by GlaxoSmithKline, protects against two strains.)

Widdice and her colleagues detail their results in the August issue of the journal Archives of Pediatric & Adolescent Medicine.

Pass it on: Girls can get HPV even without sexual intercourse, and so HPV vaccination at a young age is recommended.

Follow Rachael Rettner on Twitter @RachaelRettner, or MyHealthNewsDaily @MyHealth_MHND. We're also on Facebook & Google+.

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STUDY: Chemotherapy Can Actually Make Cancer Worse

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Chemo

Despite its life-saving qualities, chemotherapy has long had a nasty reputation, known as a necessary poison for people suffering from cancer.

But in some cases, chemotherapy is so damaging that it may even backfire and make the cancer worse, a new study has found.

The study, published in Nature Medicine, found that chemotherapy causes damage to healthy cells, which triggers them secrete a protein that actually sustains tumor growth, Cancer UK reported

The researchers made the finding while trying to figure out a major mystery: why are cancer cells are so easy to kill in a lab, but so difficult to kill in the human body? The findings were "completely unexpected," researchers told AFP.

More from GlobalPost: When the BRICs crumble

In cancer treatment, tumors often respond well at first, only to rapidly regrow and become resistant to chemotherapy later on, AFP reported. "Our results indicate that damage responses in benign cells ... may directly contribute to enhanced tumor growth kinetics," the research team wrote. A solution to this problem would be chemotherapy that is better at targeting cancer cells and avoiding healthy cells. 

Previous research has found that chemotherapy can also cause brain damage. Radiation cancer treatments have also been shown to cause cancer later on. 

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Texas Study Links Earthquakes And Drilling Disposal Wells

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Most recent earthquakes in North Texas happened close to injection wells used to dispose of wastewater from oil and gas drilling in the region, according to new research.

A two-year study by the University of Texas at Austin also found that the relatively minor temblors happened more often than indicated in previous investigations.

The UT study, published this week in "Proceedings of the National Academy of Sciences," is the latest to suggest a link between drilling and seismic activity.

"You can't prove that any one earthquake was caused by an injection well," said Cliff Frohlich, the University of Texas researcher who conducted the study. "But it's obvious that wells are enhancing the probability that earthquakes will occur."

A U.S. Geological Survey report released earlier this year found that an increase in small temblors throughout the Midwest coincides with the injection of drilling wastewater in deep disposal wells. An Ohio state agency concluded in March that a wastewater injection well was responsible for a dozen earthquakes in Youngstown last year. And in June, the National Research Council released a report concluding that while there is a low risk of earthquakes directly tied to oil and gas drilling techniques, underground wastewater injections pose a higher risk of triggering seismic activity.

Drilling companies have said they do not believe earthquakes are linked to injection wells.

The wells store wastewater from hydraulic fracturing, a technique that involves pumping mixtures of water, sand and chemicals underground to release natural gas and oil trapped in dense rock formations.

About a third of the water that is pumped underground emerges as "flowback" water before a well starts producing. Later, the well discharges a briny, metal-laden "produced" water that comes from the formation itself.

The wastewater sometimes goes to municipal treatment plants or is saved for reuse at future sites but also commonly is injected underground.

Frohlich's research focused on seismic data from the Barnett Shale region of Texas from November 2009 to September 2011. He concluded that the most reliably pinpointed earthquakes occurring during that time were in eight groups, all within two miles of one or more injection wells.

That's a change from earlier studies that associated two earthquake groups in the area with specific injection wells.

But his data also show disparities. In some cases where drillers rapidly disposed of wastewater underground, there were temblors nearby. But in other cases with similar circumstances, there were no resulting quakes.

Frohlich speculated the difference may be that wastewater injected in some wells reaches existing faults.

Some of the earthquakes were too small to feel on the surface; others, as high as 2.5 in magnitude, were still too light to pose any real danger, the study said.

Although Frohlich's research focused on the Barnett Shale, recent rumblings in the Eagle Ford formation also have drawn attention. A magnitude 4.8 earthquake rattled central and south Texas last October -- followed by a magnitude 3.3 quake in November. Neither was linked with injection wells or drilling in the region, but they stoked fears of fracturing-tied tremors.

Federal regulations governing drilling -- including newly proposed mandates for hydraulically fractured wells on public lands -- have not tackled the issue head-on. But some states already have moved to address it. Ohio officials, for example, responded to the Youngstown quakes by imposing new permitting requirements and geological mandates on drillers.

Kevin Book, an analyst with ClearView Energy Partners, said this year that he anticipates Texas and other states that are accustomed to oil and gas exploration will have measured, "pragmatic" responses -- including moving disposal wells.

jennifer.dlouhy@chron.com ___

(c)2012 the Houston Chronicle

Visit the Houston Chronicle at www.chron.com

Distributed by MCT Information Services

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Sleeping Pills Cause A Type Of Amnesia That Tricks Us Into Thinking We Slept Well

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Sleeping pills on average only make people fall asleep 12 minutes faster and sleep 11 minutes longer during the night.

The placebo effect makes people relax. Also, these pills cause a form of amnesia so even if you did toss and turn for hours you might not remember it the next day.

Via Dreamland: Adventures in the Strange Science of Sleep:

A number of studies have shown that drugs like Ambien and Lunesta offer no significant improvement in the quality of sleep that a person gets. They give only a tiny bit more in the quantity department, too. In one study financed by the National Institutes of Health, patients taking popular prescription sleeping pills fell asleep just twelve minutes faster than those given a sugar pill, and slept for a grand total of only eleven minutes longer throughout the night.

If popular sleeping pills don’t offer a major boost in sleep time or quality, then why do so many people take them? Part of the answer is the well-known placebo effect. Taking any pill, even one filled with sugar, can give some measure of comfort. But sleeping pills do something more than that. Drugs like Ambien have the curious effect of causing what is known as anterograde amnesia. In other words, ingesting the drug essentially makes it temporarily harder for the brain to form new short-term memories. This explains why those who take a pill may toss and turn in the middle of the night but say the next day that they slept soundly. Their brains simply weren’t recording all those fleeting minutes of wakefulness, allowing them to face each morning with a clean slate, unaware of anything that happened over the last six or seven hours.

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Your Smile Predicts How Long You'll Live

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The span of a person's smile in photos is predictive of how long they will live.

Via Smile: The Astonishing Powers of a Simple Act (TED Books):

A Chinese proverb states that “every smile makes you a day younger.” The spirit of this ancient saying was supported by another surprising study that found that big, beaming smiles may be the secret to more than just a sense of well-being. A 2010 research project at Wayne State University in Michigan, conducted by the Center for Growth and Human Development and published in Psychological Science, examined the baseball card photos of 230 Major League players from 1952.

By coding the smiles, and categorizing them from no smile to full, genuine smiles, the study found that the span of a player’s smile could actually predict the span of his life! Players who didn’t smile in their pictures lived an average of only 72.9 years, players with partial smiles lived for an average of 75 years, and players with big, beaming smiles lived an average of 79.9 years.

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5 reasons to smile today (that aren't corny)

Can a smile prevent a bank robbery?

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Weight-Lifting Could Reduce The Risk Of Type 2 Diabetes

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Pumping weights five times a week can reduce the risk of type 2 diabetes by a third and if combined with aerobic exercise can curt the risk by almost 60 per cent, a study has found.

Even small amounts of weight training had an effect on type 2 diabetes, it was found, which is important for those people who cannot cope with aerobic exercise, the authors said.

However, combining both weight training and aerobic exercise gave the biggest benefits, they said.

Type 2 diabetes affects around two million people in Britain, many of which do not know they have it. It is largely associated with being overweight and substantially increases the risk of suffering a heart attack.

The researchers from Havard School of Public Health in Boston, America and the University of Southern Denmark, followed 32,000 men for 18 years.

The benefits of weight training and aerobic exercise were independent of each other, meaning participants reduced their risk of diabetes by only doing one, but the combined effects were greater, it was found.

The findings were published online in Archives of Internal Medicine.

Lead author Anders Grøntved, visiting researcher in the Department of Nutrition at HSPH and a doctoral student in exercise epidemiology at the University of Southern Denmark, said: "Until now, previous studies have reported that aerobic exercise is of major importance for type 2 diabetes prevention.

"But many people have difficulty engaging in or adhering to aerobic exercise. These new results suggest that weight training, to a large extent, can serve as an alternative to aerobic exercise for type 2 diabetes prevention."

The participants were asked to fill in questionnaires every two years on their lifestyle and other factors such as television viewing, alcohol consumption, other exercise and family history of diabetes were taken into account.

The researchers found men who did between 1 and 59 minutes of weight training per week reduced their risk of type 2 diabetes by 12 per cent compared with those who did none.

For those completing between 60 and 149 minutes their risk was cut by a quarter and those doing the most, at least 150 minutes reduced their risk by a third.

Aerobic exercise, such as running, had a similar effect with reductions of seven per cent, 31 per cent and 52 per cent respectively.

However men who did more than 150 minutes of aerobics as well as at least 150 minutes of weight training per week had a 59 per cent reduced risk of type 2 diabetes compared to those who did nothing.

Senior author Frank Hu, professor of nutrition and epidemiology at Harvard School of Public Health said: "This study provides clear evidence that weight training has beneficial effects on diabetes risk over and above aerobic exercise, which are likely to be mediated through increased muscle mass and improved insulin sensitivity.

"To achieve the best results for diabetes prevention, resistance training can be incorporated with aerobic exercise."

Another study in the same journal found that people who already have type 2 diabetes can substantially reduce their risk of dying early from the complications caused by the disease, if they exercise.

Dr Diewertje Sluik, of the German Institute of Human Nutrition Potsdam-Rehbrücke, in Nuthetal, Germany, studied 5,859 patients with diabetes and examined 12 other studies.

Those who were moderately active cut their risk of dying from heart disease by around half and from any cause by around 38 per cent.

Moderate activity was defined as people who had a sedentary job but cycled, walked in leisure time or those with a job that involved standing for most of the time.

In an accompanying editorial Dr Mitchell H. Katz, of the Los Angeles County Department of Health Services, said the effect of exercise on mortality was greater than could be expected from drugs.

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Diets High In Sugar And Fat Prime The Brain To Overeat

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ORLANDO, Fla. – Obesity may cause changes to the brain that actually fuel more overeating, recent research suggests.

Such a vicious cycle may be a reason why people find it especially hard to lose weight once they become obese, said Terry Davidson, director of the Center for Behavioral Neuroscience at American University in Washington, D.C.

In a talk here at the American Psychological Association meeting, Davidson said that high-sugar, high-fat foods often found in a Western diet have been shown in animal models to impair the function of the brain's hippocampus. This brain area is important for memory, and is thought to help control food intake. Rats that have their hippocampus damaged will eat too much and gain weight, Davidson said.

The hippocampus also helps suppress unwanted thoughts or memories. If the hippocampus is impaired in obese people, they may find it hard to suppress thoughts of food, and as a consequence, more likely to eat food when they see it, Davidson said.

If the results from animal studies hold true in people, researchers may be able to develop new therapies to help obese people lose weight.

"We've identified a potential area of the brain that should be a target for either psychological or pharmacological therapies," Davidson said. If the damage to the hippocampus can be repaired, "it should make it easier for people to control their [food] intake," Davidson said.

Researchers have identified several ways that high-fat and high-sugar foods may hurt the hippocampus. In one study, rats fed a Western diet developed a leaky blood-brain barrier, said Scott Kanoski, a behavioral neuroscientist at the University of Pennsylvania. If the blood-brain barrier is impaired, it would allow toxins to enter the brain, and potentially damage the hippocampus, Kanoski said. It could also allow immune system proteins to enter the brain, and cause brain inflammation, Davidson said.

Studies conducted by Kanoski and colleagues on rats have also found that a Western diet decreases the levels of a protein called brain-derived neurotrophic factor, or BDNF, in part of the hippocampus. BDNF is known to be important for memory function, Kanoski said.

An increasing amount of research has also linked obesity to cognitive impairment in people, Davidson said. It may only be a matter of time before cognitive impairment, such as dementia, is considered a health consequence of obesity by government agencies, Davidson said.

Pass it on: The Western diet may not only cause obesity, but also harm the brain in a way that leads people to eat more.

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Our Solar System Was Created By An Exploding Star

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The shock wave from an exploding star likely helped trigger the formation of our solar system, according to a new 3D computer model, researchers say.

The solar system is thought to have coalesced from a giant rotating cloud of gas and dust known as the solar nebula about 4.6 billion years ago. For decades, scientists have suspected a star explosion called a supernova helped trigger our solar system's formation. In particular, the shock wave from the explosion is thought to have compressed parts of the nebula, causing these regions to collapse.

According to this theory, the shock wave would have injected material from the exploding star into the solar nebula. Scientists have previously detected potential evidence of this pollution in meteorites. These contaminants are remnants of short-lived radioactive isotopes — versions of elements with the same number of protons as their more stable cousins, but with a different number of neutrons.

Short-lived radioactive elements decay over the course of millions of years, becoming a variety of "daughter" elements at known rates. ("Short-lived" is a relative term — other radioactive isotopes that scientists analyzing meteorites study may decay on timescales of billions of years.)

However, analysis of the short-lived radioactive isotopes and their daughter elements seen in primitive meteorites raised a challenge to the supernova theory of the solar system's formation. The evidence suggested the short-lived radioactive isotopes had to have formed in the supernova, made their way into the solar nebula and been trapped within the meteorites all in less than a million years. [Supernova Photos: Great Images of Star Explosions]

To see if a supernova could explain this pattern of isotopes seen in primitive meteorites, scientists developed computer models of supernova shock waves and solar system formation.

"The evidence leads us to believe that a supernova was indeed the culprit," said study lead author Alan Boss, an astrophysicist at the Carnegie Institution in Washington, D.C.

Previously, Boss and his colleague Sandra Keiser developed two-dimensional models involving the short-lived radioactive isotope iron-60, which is only created in significant amounts by nuclear reactions in massive stars and must have come either from a supernova or from a giant star called an AGB star. These models showed the iron-60 seen in primitive meteorites probably came from a supernova, since shock waves from AGB stars would be too thick to inject iron-60 into the solar nebula. In contrast, supernova shock waves are hundreds of times thinner.

Now Boss and Keiser have developed the first 3D computer models of supernova shock waves and solar system formation. These enabled them to see the shock wave striking the solar nebula, compressing it and forming a parabolic shock front that enveloped the cloud, creating fingerlike indentations in the cloud's surface. These "fingers" injected short-lived radioactive isotopes from the supernova into the nebula. Less than 100,000 years later, the cloud collapsed, triggering the birth of our solar system.

The 3D models revealed that only one or two "fingers" could explain the short-lived radioactive isotopes found in primitive meteorites. However, the researchers are still trying to find various combinations of supernova shock wave parameters that will line up with observations of exploding supernovas. Also, they need to make the solar nebula rotate "so that it will form a star surrounded by a protostellar-protoplanetary disk after it collapses," Boss told SPACE.com.

Boss and Keiser will detail their findings in an upcoming issue of the journal Astrophysical Journal Letters.

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'Locked-In' Coma Survivor Describes Hearing Doctors Discuss Ending His Life

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Richard Marsh

Two days after regaining consciousness from a massive stroke, Richard Marsh watched helplessly from his hospital bed as doctors asked his wife, Lili, whether they should turn off his life support machine.

Marsh, a former police officer and teacher, had strong views on that suggestion. The 60-year-old didn't want to die. He wanted the ventilator to stay on. He was determined to walk out of the intensive care unit and he wanted everyone to know it.

But Marsh couldn't tell anyone that. The medics believed he was in a persistent vegetative state, devoid of mental consciousness or physical feeling.

Nothing could have been further from the truth. Marsh was aware, alert and fully able to feel every touch to his body.

"I had full cognitive and physical awareness," he said. "But an almost complete paralysis of nearly all the voluntary muscles in my body."

The first sign that Marsh was recovering was with twitching in his fingers which spread through his hand and arm. He describes the feeling of accomplishment at being able to scratch his own nose again. But it's still a mystery as to why he recovered when the vast majority of locked-in syndrome victims do not.

"They don't know why I recovered because they don't know why I had locked-in in the first place or what really to do about it. Lots of the doctors and medical experts I saw didn't even know what locked-in was. If they did know anything, it was usually because they'd had a paragraph about it during their medical training. No one really knew anything."

Marsh has never spoken publicly about his experience before. But in an exclusive interview with the Guardian, he gave a rare and detailed insight into what it is like to be "locked in".

"All I could do when I woke up in ICU was blink my eyes," he remembered. "I was on life support with a breathing machine, with tubes and wires on every part of my body, and a breathing tube down my throat. I was in a severe locked in-state for some time. Things looked pretty dire.

"My brain protected me – it didn't let me grasp the seriousness of the situation. It's weird but I can remember never feeling scared. I knew my cognitive abilities were 100%. I could think and hear and listen to people but couldn't speak or move. The doctors would just stand at the foot of the bed and just talk like I wasn't in the room. I just wanted to holler: 'Hey people, I'm still here!' But there was no way to let anyone know."

Locked-in syndrome affects around 1% of people who have as stroke. It is a condition for which there is no treatment or cure, and it is extremely rare for patients to recover any significant motor functions. About 90% die within four months of its onset.

Marsh had his stroke on 20 May 2009. Astonishingly, four months and nine days later, he walked out of his long-term care facility. Today, he has recovered 95% of his functionality; he goes to the gym every day, cooks meals for his family and last month, he bought a bicycle, which he rides around Napa Valley, California, where he lives.

But he still weeps when he remembers watching his wife tell the doctors that they couldn't turn off his life support machine.

"The doctors had just finished telling Lili that I had a 2% chance of survival and if I should survive I would be a vegetable," he said. "I could hear the conversation and in my mind I was screaming 'No!'"

Locked-in syndrome is less unknown than it once was. The success of the 2007 film, The Diving Bell and the Butterfly, the autobiography of the former editor of French Elle magazine editor, Jean-Dominique Bauby, brought awareness of the condition to the general public for the first time.

Then in June, Tony Nicklinson failed in his court battle to allow a doctor to end a life he said was "miserable, demeaning and undignified".

Marsh, however, did something almost unheard of: he recovered. On the third day after his stroke, a doctor peered down at him and uttered the longed-for words: "You know, I think he might still be there. Let's see."

The moment that doctor discovered Marsh could communicate through blinking was one of profound relief for Marsh and his family – although his prognosis remained critical.

"You're at the mercy of other people to care for your every need and that's incredibly frustrating, but I never lost my alertness," he said. "I was completely aware of everything going on around me and to me right from the very start, unless when they had me medicated," he said.

"During the day, I was really lucky: I never spent a single day when my wife or one of my kids wasn't there. But once they left, it was lonely – not in the way of missing people but the loneliess of knowing there's no one there who really understands how to communicate with you."

The only way for Marsh to sleep, was to be medicated. That, however, only lasted four hours, after which there had to be a three-hour pause before the next dose could be administered.

In questions submitted by Guardian readers to Marsh ahead of this interview one asked about his experience of his hospital care while the staff did not think he was conscious. Marsh said: "The staff who work at night were the newest and least skilled, and I was totally at their mercy. I felt very vulnerable. I did get injured a couple of times with rough handling and that always happened at night. I knew I wasn't in the best of care and I just counted the minutes until I would get more medicine and just sleep.

In response to another question, about the right-to-die debate, Marsh said he has no opinion. All he will say is: "I understand the despair and how a person would reach that point." But he is co-writing a book that he hopes will inspire hope and provide information to victims of locked-in syndrome and their families.

"When they first told my family that I was probably locked-in, they tried to find information on the internet – but there wasn't any. One of my goals now is to change that … to be able to reach out to families who find themselves in the same situation that mine were in so they can help their loved ones.

"Time goes by so slow ... It just drags by. I don't know how to describe it. It's almost like it stands still.

"It's a terrible, terrible place to be but there's always hope," he added. "You've got to have hope."

This article originally appeared on guardian.co.uk

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Physics Students Rip Apart The Science Behind The Movie 'Armageddon'

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Bruce Willis and a nuclear bomb would not be able to protect the world from annihilation by a giant asteroid, according to a study which questions the scientific integrity of Michael Bay's 1998 blockbuster Armageddon.

In the film Willis, an oil drilling expert, is able to save the planet from imminent obliteration by flying around the moon, landing on the surface of the asteroid which threatens Earth and detonating a hydrogen bomb at its centre.

The heroic act, made possible by Willis's drilling expertise, splits the asteroid into two even halves which drift apart and fly relatively harmlessly past either side of the planet, saving humanity from extinction.

But now the effectiveness of the solution has been called into question by a group of physics students who claim mankind does not possess a bomb big enough to do the job.

A mathematical analysis of the situation found that for Willis's approach to be effective, he would need to be in possession of an H-bomb a billion times stronger than the Soviet Union's "Big Ivan", the biggest ever detonated on Earth.

Using estimates of the asteroid's size, density, speed and distance from Earth based on information in the film, the postgraduate students from Leicester University found that to split the asteroid in two with both pieces clearing Earth would require 800 trillion terajoules of energy.

In contrast the total energy output of "Big Ivan", which was tested by the Soviet Union in 1961, was only 418,000 terajoules.

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With such insufficient power, the only way for the Armageddon mission to work in reality would be to detonate the bomb at the outer edge of the Kuiper Belt, a region of the solar system beyond Neptune's orbit where Pluto is located.

The Kuiper Belt is filled with icy bodies and Pluto-like dwarf planets but has very few high-iron content asteroids like the one featured in Armageddon, making it highly unlikely that one would originate from so far away, they added.

Ben Hall, one of the authors of Could Bruce Willis Save the World?, published in the Special Physics Topics journal, said: "I really enjoyed the film Armageddon and up until recently never really considered the plausibility in the science behind the movie. But after watching it back I found myself being more sceptical about the film in many areas.

"Directors attempt to make films scientifically accurate, but find that a lot of trouble is run into in what can and cannot be done, thus leading to falsification in the science to make movies more interesting or visually appealing to the audience."

In a follow-up study the four students also calculated that the Hubble Space Telescope, the most powerful telescope available in the 1990s, would only realistically have been able to detect the asteroid at a distance of eight billion miles – almost the exact point at which it would need to be split.

Even in the unlikely event the asteroid was picked up in an image from the telescope, which has less than 0.02 per cent of the sky in its field of view, this would leave no time for Bruce Willis to reach it, the students said.

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Computers Go Where People Can't To Find New Sources Of Gold

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Gold and other valuable metals hidden within mountain ranges can now be discovered through 3D computer models, says an Israeli researcher who developed the software for them.

Mountain ranges are notoriously difficult environments in which to hunt valuable minerals, but the new approach already has revealed a deposit of more than 500,000 tons of metals on the southern slope of the Caucasus between the Black and Caspian seas. The reserve includes copper, zinc, lead, aluminum, and a mixture of gold and silver, investigators say.

The 3D models are based on data gathered from other methods already used to hunt for such underground resources as metals, oil, gas or water, researcher Lev Eppelbaum, a geophysicist at Tel Aviv University in Israel, explained. There are a number of ways to detect the presence of metals — for instance, measuring how magnetic fields vary over the Earth's surface.

Scientists also can look for gravitational variations. The strength of Earth's gravitational field on any point of the planet's surface varies on the density of the underlying matter, and the density of polymetallic ore, which consists of more than one metal, exceeds that of the surrounding rocks. Satellites can provide a measure of how the Earth's gravitational field varies over its surface by the changes in their orbits as they pass overhead.

However, when it comes to mountain ranges, the mapping of magnetic and gravitational fields can easily get thrown off by changes in the altitude of the landscape, surrounding temperature, and air pressure, Eppelbaum said.

To analyze such complex, rough terrain, Eppelbaum and colleague Boris Khesin of Ben Gurion University in Israel developed new mathematical approaches to process the information gathered from already existing methods. Their specially designed software then allows researchers to interpret all this data in a cohesive 3D model.

"This 3D combined modeling software, which we programmed ourselves, enables scientists to see the buried targets more clearly," Eppelbaum said.

The system essentially focuses on eliminating different types of "noise" from multiple sources of data to get a clearer picture of anomalies underground.

"This interpreting system has been specially developed for complex geological environments," Eppelbaum told InnovationNewsDaily.

In addition to the Caucasus, Eppelbaum said, the software could be applied to mountainous regions such as the Appalachian Mountains in the United States and Canada or the Alps in Europe. He now plans to collaborate with geophysicists worldwide to discover new mineral reserves around the world. [Shortage of Rare Metals Could Threaten High-Tech Innovation]

"These reserves are very valuable resources for countries to discover," Eppelbaum said.

Gaps in geophysical data remain a major hurdle for researchers, however. For instance, when it comes to the Caucasus, some valuable information is not available, such as on uranium deposits of the northern Caucasus. "The last data on oil and gas developments in the Caucasian region are also unacceptable," Eppelbaum said.

The findings by Eppelbaum and Khesin, who died in 2010, were detailed at the European Geosciences Conference in Vienna in April and in their book "Geophysical Studies in the Caucasus."

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IT'S OFFICIAL: The East Coast Has Just Experienced The Hottest Year On Record

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(Reuters) - The first seven months of this year have been the hottest on record in the northeastern United States, researchers at Cornell University said on Tuesday.

Cornell's Northeast Regional Climate Center said the average temperature for the region from January to July was a balmy 49.9 degrees Fahrenheit (9.9 Celsius), making it the warmest for the period since record-keeping began in 1895.

On a state-by-state basis, the seven-month period marked the warmest across New York, New Jersey, Delaware and Maryland, along with Connecticut, New Hampshire, Maine, Massachusetts, Rhode Island and Vermont, the Regional Climate Center said.

In Pennsylvania and West Virginia, it was the second-warmest first seven months of a year.

The 12 months that ended July 31 were the warmest in 117 years in every northeastern state expect West Virginia, the university researchers said.

"We're seeing quite a bit of these records being broken in the 2000s," said Mark Wysocki, a senior climatologist at the Northeast Regional Climate Center, adding that four of the top 10 highest averages were set during the past 12 years.

Heat waves, coupled with droughts and wildfires, have grabbed headlines across much of the United States this year.

But many scientists have cautioned against reading too much into a relatively small set of data or saying whether the extreme weather events are unmistakable evidence of global climate change.

(Editing By Joseph O'Leary and Cynthia Osterman)

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How Tall You Are Is The Outcome Of A Genetic Battle Of The Sexes

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For women looking to pass on their genes, it pays to be short. For men, tall is the ideal. The result? An evolutionary tug-of-war in which neither gender reaches their perfect height.

Those are the results of a new study published today (Aug. 7) in the journal Biology Letters. The research finds that an evolutionary battle of the sexes keeps the genders in an endless feedback loop of height variations across the generations.

"We should not simply assume that when a trait is beneficial for one sex, that selection or evolution will necessarily favor this trait," study researcher Gert Stulp, a scientist at the University of Groningen in the Netherlands, told LiveScience in an email.

In the same way, traits that harm one sex but not the other may not be "weeded out" by natural selection, Stulp said.

"This may even hold for health-related traits, such that genetic underpinnings beneficial to the health of one sex may increase the susceptibility to disease in the other sex," he said.

Why height matters

In modern western societies, studies have found that women who are on the short side tend to have more children. In contrast, average-height men do the best, reproductively speaking, outpacing short and tall men in number of children fathered, Stulp said.

Men and women are sexually dimorphic, meaning there are obvious bodily differences in size and shape between the sexes. But we also share most of our genome, meaning that evolution has a limited toolbox for creating this dimorphism. That can lead to conflict in which evolutionary forces act on males and females in opposite directions.

Given the evolutionary pressure for short women and average men, height seemed a potential area of conflict. Stulp and his colleagues pulled data from a long-running research project called the Wisconsin Longitudinal Study, which has followed more than 10,000 Wisconsin high-school graduates for nearly 50 years.

The researchers took data from pairs of siblings from this study, including 808 brother-brother pairs, 996 sister-sister pairs and 1,718 brother-sister pairs. They averaged the heights across the pairs to get a better sense of average family height — height is highly heritable and is under the influence of multiple genes — and then examined how height related to the number of children in each family. [6 (Other) Great Things Sex Can Do For You]

Evolutionary back-and-forth

The results revealed that in short families, where both brother and sister were likely to be below-average height, sisters had more children than brothers. In average-height families, however, brothers had more children than their sisters.

In other words, if you were born into a short family, you'd be more likely to have nieces and nephews through your sister than your brother. If your family was of average height, your brother would be the one more likely to make you an aunt or uncle.

The findings support the idea that the sexes are locked in a push-and-pull battle over height. Here's how it works: Say a woman is shorter than average. This makes it more likely she'll have children and pass on her genes. If she has a daughter and a son, they're likely to be short, thanks to their mother's genes. That's good for the daughter — evolution is pushing her toward her ideal height to pass on her genes — but bad for her son, as he would be more likely to reproduce if he had a few more inches.

This pattern happens over an entire population, not just a single family. What that means is that as the population as a whole gets shorter because of short women reproducing more, everyone is moving away from the ideal height for men. That increases the evolutionary pressure for men, so that taller guys reproduce more than their shorter brethren, pushing the heights of the next generation back into the average range. [5 Myths About the Male Body]

"Because selection in this generation is then likely to be stronger on average-height men, the next generation will again be slightly taller," Stulp said. "This is, of course, to the detriment of women, so that the selection pressure on female height will get stronger to push it back to shorter height again."

This back-and-forth loop between slightly shorter and slightly taller generations will continue as long as evolutionary pressures for men and women remain different, Stulp said.

Many factors play a role in mate choice, Stulp said, and height is only one. Nevertheless, research has found that people do care about height when picking a mate, he said.

"Asking people about their preferences for height and examining, for instance, the role of height in speed-daters, a reasonably clear picture arises: Taller men and average height women are on average preferred," he said. "Particularly women value height in their male partner." 

Height is also correlated with income, attractiveness, education, health and longevity, Stulp said.

Other traits may be subject to the same evolutionary battle of the sexes, he said. For example, wide hips are good for women in childbirth, but not ideal for locomotion in men. Perhaps facial masculinity is another example, Stulp said: A macho-faced guy is likely to do well with the ladies, but his sisters who inherit the same traits aren't likely to be as attractive to potential male mates.

"I think it is important to recognize that evolutionary processes occur in contemporary human populations," Stulp said. "Evolution did not stop at the industrial revolution."

Follow Stephanie Pappas on Twitter @sipappas or LiveScience @livescience. We're also on Facebook Google+

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More Kids And Teens Are Prescribed Antipsychotics Than Ever Before

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NEW YORK (Reuters Health) - Antipsychotic drugs are prescribed during almost one in three of all visits kids and teens make to psychiatrists in the United States, according to a new study, up from about one in eleven during the 1990s.

Much of that increase, researchers say, is from doctors prescribing the drugs for disruptive behaviors, such as attention deficit/hyperactivity disorder (ADHD). There are, however, no antipsychotics approved by the U.S. Food and Drug Administration to treat those disorders in kids.

"They're approved for schizophrenia and bipolar disorder and irritability with autism. None of them are approved for use with ADHD," said Dr. Mark Olfson, the study's lead author and a professor of clinical psychiatry at Columbia University in New York.

Olfson and his colleagues, who published their work Monday in the Archives of General Psychiatry, found that for kids and teens, roughly 90 percent of the antipsychotic prescriptions written during office visits between 2005 and 2009 were "off label," which means the drugs are being prescribed for something other than for what they're approved.

While the study cannot say whether the prescriptions were unnecessary, the effectiveness of antipsychotic drugs for disorders like ADHD is uncertain. The drugs, however, have been linked to weight gain and diabetes.

Last year, a large study of children, from the University of Massachusetts, found that kids who took antipsychotic drugs were four times more likely to develop diabetes than their peers who were not taking the medications. (See Reuters Health story of November 22, 2011: http://reut.rs/MtH5dB.)

In September, an FDA advisory board also raised concerns about the drugs and urged the agency to monitor weight gain and other metabolic diseases in children taking antipsychotics. (See Reuters story of September 22, 2011: http://reut.rs/MtHCwe.)

"For some of these kids, taking these can be setting themselves up for metabolic problems in the future," said Olfson.

PRESCRIPTIONS AND ALTERNATIVES

For their study, Olfson and his colleagues used information on almost half a million doctors' visits in the U.S. between 1993 and 2009.

Overall, antipsychotic prescriptions increased across all age groups - including adults. For kids and teens, however, the increase was more rapid.

The number of kids getting antipsychotic prescriptions increased from 0.24 for every 100 people between 1993 and 1998, to 1.83 for every 100 people between 2005 and 2009.

For teens, that number increased from 0.78 for every 100 people in the 1990s to 3.76 in the 2000s.

"There is very little question as to whether these drugs are being prescribed in kids much more than they used to," said Olfson.

Those numbers, however, only represent the number of people going to doctors' offices - not clinics, community health centers or other medical centers.

Also, the researchers cannot say how long patients were on the drugs, or whether any of the prescriptions were from repeat visits by the same patient.

Overall, Olfson told Reuters Health that he hopes parents ask more questions about antipsychotics and whether there are any alternative treatments.

He said there are psychosocial interventions such as parent management training that have been shown to reduce aggressive and disruptive behaviors in kids, but added that those interventions are more expensive and take more time.

"Perhaps if they were more available, we wouldn't have as much use of these antipsychotic medications," Olfson said.

SOURCE: http://bit.ly/Qbay74 Archives of General Psychiatry, online August 6, 2012.

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Why Some People's Voices Are Obnoxiously Loud

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You know that guy with the voice heard 'round the world? The one who — no matter how far away he is — sounds as if he is shrieking directly into your ear? He seems to show up at every party, restaurant and (worst of all) office.

Voices that "carry" contain a pitch of sound that strongly resonates with both the human vocal tract and the human ear, said acoustics expert John Smith, a biophysicist at the University of New South Wales in New Zealand. This piercing pitch, dubbed the "speaker's formant," has a frequency around 3,000 hertz, or 3,000 beats per second: about the same frequency as that of fingernails scraping a chalkboard. (To hear such a voice, click here.)

By comparison, most human speech falls in the gentler 80- to 250-hertz (Hz) range.

How do loudmouthed people generate that much faster and much more earsplitting frequency? Understanding their method requires a short lesson on how speech works.

We generate sound by rapidly vibrating two small flaps of mucous membrane called vocal folds in our voice boxes, Smith said. The back-and-forth motions of these folds interrupt the flow of air from our lungs to create "puffs" of sound. If our vocal folds wiggle back and forth 100 times each second, they produce puffs with a frequency of 100 beats per second (Hz). However, additional motions of the vocal folds, such as collisions with each other, can generate additional frequencies that are multiples of that fundamental frequency: "harmonics" at 200 Hz, 300 Hz, 400 Hz and so on. [Why Are Beeps So Annoying?]

All these frequencies travel together through the vocal tract — the tubelike cavity leading from the voice box up through the throat and mouth to the outside world. Depending on its shape, this tract resonates at certain frequencies, meaning it vibrates in time with them. In the same way that an organ pipe increases the amplitude of the sound waves that travel through it, the resonance of the vocal tract amplifies those resonant frequencies, making them louder.

And that's the trick: Whether done subconsciously or on purpose, loud talkers have somehow learned to harness the natural resonances of their vocal tracts to pump up the volume of their voices. (They may have been subconsciously copying their loudmouthed parents.)

First, they manipulate their vocal folds to generate a harmonic frequency up around 3,000 Hz. "This could involve using a stronger flow of air from the lungs and controlling the folds so they undergo a motion that results in a sound that is intrinsically richer in harmonics," Smith told Life's Little Mysteries. Most people mainly produce harmonics at lower frequencies. [7 Biggest Mysteries of the Human Body]

Second, they alter the shape of their vocal tract, often narrowing or restricting the tract just above the vocal folds, so that it will resonate at that high frequency, making the high frequency louder. "This increase in sound level occurs in a frequency range where the ear is more sensitive and where background noise is usually reduced," Smith said. "Coupled with any increased harmonic content from the vocal folds, it can produce a large increase in subjective loudness."

Recent and ongoing research by Smith and his colleagues shows that singers make similar adjustments to their vocal tracts in order to project their voices. The scientists have managed to characterize how this is done at different pitches. In a report published in January in the Journal of the Acoustic Society of America, they showed that even trumpet players seem to control their own vocal resonances in order to play very high notes.

The difference is, singers and musicians are paid to project their sounds. Loudmouths do it voluntarily.

Follow Natalie Wolchover on Twitter @nattyover or Life's Little Mysteries @llmysteries. We're also on Facebook & Google+.

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The Science Of 'Breaking The Seal' When You're Drinking

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If you like beer, and like it in large quantities, this might be a familiar scenario: You sit down at the bar, get a beer and drink it.

You drink another one. Maybe a third.

Things have gone well up to this point, but now you have to pee. So you go. Once you return to your seat and keep drinking, though, it feels like you’ve crossed a point of no return, and you have to pee again and again.

You’ve “broken the seal.” After that initial pee, you seem to have to run to the bathroom every 15 to 20 minutes for the rest of the night, and the urine just won’t stop flowing. What’s going on?

Part of what makes you pee so much while boozing is that alcohol inhibits arginine vasopressin, also known as antidiuretic hormone or ADH. ADH is made in the part of the brain called the hypothalamus, and then stored and released from the pituitary gland at the base of the brain. Its job is to conserve water in the body by reducing its loss in urine. It binds to receptors on the kidneys and promotes water reabsorption, a decrease in the volume of urine sent to the bladder, and excretion of more concentrated urine.

Alcohol throws a wrench into the works, though, and blocks certain nerve channels that help get ADH secreting out into your system. Without ADH carrying on about conserving water, the kidneys don’t reabsorb water as easily and excess water winds up getting dumped into urine to leave the body. With alcohol keeping ADH from doing its job, you produce a lot more water-diluted urine, which fills the bladder quickly and makes you have to pee more often.

So, there’s really no seal to break, no dam to crack open. If anything, the damage was done when you took your first drink and started suppressing your ADH, not when you took your first pee.

Keep Going

But how come you can hold your pee just fine until that first bathroom break, and then it seems you have to go constantly?

First, it takes a little bit of time for alcohol to suppress ADH and for the kidneys to ramp up the water works. When you crack open your first beer, you may have some urine in your bladder already, but also some ADH in your system to keep things from getting out of hand. As you continue to drink, though, your ADH levels drop and your urine production increases. By the time your bladder has filled and you’re ready to go to the john, you’ve probably had a few more drinks. Your ADH is more suppressed and your kidneys are working at full tilt, so you’re going to have to go more often.

Additionally, alcoholic beverages can be a bladder irritant for many people and the carbonation of drinks like beer and champagne can cause gas and pressure that contribute to that irritation. As your bladder fills up again after the initial pee, all that irritation can create a very strong urge to pee some more and make your bladder feel fuller than it really is, sending you running to the bathroom over and over again throughout the night.

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How To Predict Which Teens Will Become Problem Drinkers

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Years before teenagers turn to heavy drinking, their developing brains already look different from their sober peers, according to a new study.

Researchers followed a group of teenagers over three years and found that those who developed heavy drinking habits (defined as four to five drinks on one occasion) showed less activity in brain regions used for higher-order decision-making, called working memory, before tasting alcohol.

"This isn't to say we're going to throw every kid in a [brain] scanner; that would not be cost effective," Lindsay Squeglia, lead author who started the work as a doctoral student in the psychiatry department at the University of California, San Diego, said in a telephone interview. However, parents and educators could use deficient working memory as a red flag to prevent possible future heavy alcohol consumption.

As for why brain activity might impact drinking behaviors in teens, Squeglia and her colleagues suggest that differences in working memory could cause teens to become more vulnerable to drinking, make them forget the negative side effects, less able to weigh risks and options in general and make for a less efficient brain. [10 Cool Facts About the Teen Brain]

Teen brains

Previous research found risk factors for teen drinking that might make a teen more vulnerable, such as family history, conduct disorder problems and age, but, "the brain study was able to predict future drinking better," Squeglia said.

The researchers focused on brain regions known to be involved in working memory — the way people store and manipulate information to make higher-order choices beyond impulses, a function teens and young adults are still developing.

Using functional magnetic resonance imaging, a method that detects brain activity through changes in blood flow, the group peeked into the brains of 40 adolescents ages 12 to 16 as they performed memory tests; scans were taken again about three years later, when half, or 20 individuals, had resorted to heavy drinking.

The 20 non-drinkers and 20 heavy drinkers were matched for age, gender, family history of alcoholism and socioeconomic markers.

At the start of the study, the brains of the future heavy drinkers showed less activity compared with the non-drinkers in the frontal and parietal lobe regions, which are involved in visual-spatial processing.

"Some teens are especially prone to heavy drinking because of differences in the way they process information," said David Kerr, of the Oregon Social Learning Center, who was not involved in the study. "And those differences are visible in their brains, likely before they touch a bottle."

And it turns out, heavy drinking during that three-year interval seems to have taken a toll on these teens' brains. At the three-year-or-so mark, when performing memory tasks, drinking teens showed more activity in the frontal and parietal lobes than their peers; they also showed less activity in the occipital lobe, or the brain's reward center involved in short-term memory and planning tasks.

"The heavy drinkers had to use more brainpower to complete the same task as the [non-drinking] controls," Squeglia said.

Kerr, who said the study was telling "this incredibly interesting story," notes the vicious cycle drinking and the teen brain.

"We see this interplay of bad luck — in the form of brain characteristics that make heavy drinking more likely in the future — and bad outcomes —where the teen brain is made worse for it," Kerr wrote in an email to LiveScience. (Kerr and his colleagues reported this month finding that a father's alcohol use during his childhood predicted his children's alcohol use.)

Reducing teen binge-drinking

Since 1997, binge drinking has significantly decreased in high school-age youth in the United States, according to data from the Centers for Disease Control and Prevention.

How to further decrease binge drinking is an important public health question, the researchers said.

For Squeglia, one next step is to look at other brain regions to determine if other preexisting differences exist between heavy and non-drinkers.

Future research will include "not just looking at what happens in the brain, but trying to intervene during this critical developmental period (when adolescents) start to drink," Squeglia said.

The study is detailed online today (Aug. 8) in the Journal of Studies on Alcohol and Drugs.

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Swine Flu Is Spreading In Indiana

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Swine flu is spreading in Indiana, with human cases rising tenfold in a week, state public health officials said on Wednesday, confirming 113 people are infected and saying they expect to see more.

The total confirmed cases of the Influenza A variant virus that has been transmissible from swine to humans in Indiana jumped from just 11 last week.

The cases, which show symptoms of a mild seasonal flu, have been found in 18 counties across the state, state health official said.

On Monday, Indiana said it was closing the swine barn at its state fair one day early after six pigs showed elevated temperatures that could be a sign of the illness.

"It's important for folks to remember this is a mild illness with symptoms similar to what we see with seasonal flu," Dr. Gregory Larkin, the state's health commissioner, said in a statement.

Health officials have warned people to wash their hands before and after they are near swine and to not eat or drink in close proximity to pigs.

Federal officials have reported an unusually high number of human swine flu cases from a relatively new strain, influenza A variant, that came up last year.

Last week, the U.S. Centers for Disease Control and Prevention warned people to be cautious around pigs after several cases of swine flu were linked to attendance at agricultural fairs where sick pigs were present.

At the time, the CDC reported a dozen new cases of the swine flu variant had pushed the number of total cases to 29 seen since the H3N2v strain had surfaced in July 2011. Since last week, health officials in Ohio and Indiana had reported additional cases.

The flu in swine rarely jumps to humans, but can be spread when people are standing near an infected pig that coughs or sneezes. The flu also can be spread when a person touches an infected pig or a surface, and then their own mouth or nose.

"We believe most of these cases are still due to contact with pigs," CDC spokesman Tom Skinner said on Wednesday. "However, limited human-to-human transmission with this virus has been observed in the past and we expect that some human to human spread will be observed in these current outbreaks."

(Reporting by Susan Guyett. Writing by David Bailey. Editing by Corrie MacLaggan and David Gregorio)

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