iStockphoto(OXFORD, England) -- Bad at math? A new study by researchers at Oxford University suggests that applying high-frequency electrical noise to the brain can make you better at math for up to six months following treatment.

According to BBC News, 51 Oxford students participated in the small study appearing in Current Biology. Over a five-day period the students had to complete two arithmetic problems each day. Half were given transcranial random noise stimulation, or TRNS.

Six months later, the group that had received the TRNS preformed much better when asked to solve math problems than the control group.

Dr Roi Cohen Kadosh, study author from the department of experimental psychology at the University of Oxford, explained that the results “suggested that TRNS increases the efficiency with which stimulated brain areas use their supplies of oxygen and nutrients."

Dr Michael Proulx, senior lecturer in psychology at Bath University, told BBC News that using TRNS this was could have "real, applied impact," and could help those with learning disabilities or who are suffering from a stroke or other neurodegenerative illness.

Experts stress, however, that more testing is required before the practice becomes widespread, so don’t expect to hear math teachers telling students to put away their TRNS machines before tests anytime soon.

Copyright 2013 ABC News Radio

Jupiterimages/Thinkstock(NEW YORK) -- Over the past ten years, the rate of mental health disorders in American children has been rising, according to a new study.

Between 13 and 20 percent of children have experienced a mental disorder, says the study, published in the Morbidity and Mortality Weekly Report. Those figures were based on surveillance data from a number of federal agencies, including the Centers for Disease Control, gathered between 1994 and 2011.

The data from 2010 showed that the second leading cause of death among children between the ages of 12 and 17 was suicide. Additionally, mood disorders were the most frequent diagnosis for hospitalized children in the United States.

Among the most prevalent mental disorders in American children were ADHD, behavioral or conduct problems, anxiety and depression.

The CDC concluded that comprehensive surveillance is needed to prevent mental disorders and promote mental health for children.

Statistics from 2010 showed that children were hospitalized for mental disorders at a rate of 17 hospital stays per 10,000 population, up 80 percent from 1997.

Copyright 2013 ABC News Radio

iStockphoto/Thinkstock(NEW YORK) -- Mini-movies of growing embryos could help boost the success of in vitro fertilization, a new study found. But the number of women who could benefit from the time-lapse technology is unclear.

For the study, British researchers used time-lapse photography to track the earliest stage of embryonic development – a process that unfolds in womb-mimicking incubators for couples using IVF. The researchers then used an algorithm to spot the embryos most likely to grow into babies.

"Embryo selection based predominantly on specific time-lapse derived algorithms could rapidly become routine in IVF treatment," the study authors wrote in the journal Reproductive BioMedicine Online, describing how the healthiest-looking embryos had a 72.7 percent chance of leading to a pregnancy and a 61.1 percent chance of resulting in a live birth.

Embryos deemed to look less healthy by the time-lapse technique had a 25.5 percent chance of leading to a pregnancy and 19.2 percent of resulting in a live birth, according to the study.

But the study was small, with only 69 couples, and some experts say many women lack the luxury of choice when it comes to embryo implantation.

"A lot of the time, we don't have that many embryos to choose from," said Dr. James Goldfarb, director of the University Hospitals Fertility Center in Cleveland and past president of the Society for Assisted Reproductive Technologies, who was not involved in the study.

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An IVF cycle starts with a woman taking drugs to stimulate the production of multiple eggs. After about two weeks, the eggs are collected and fertilized. Then, the resulting embryos are grown in a lab for up to five days, depending on how many there are and how healthy they look.

The more healthy embryos there are, the more likely an embryologist will watch them for five days to let the weakest die off, leaving the strongest behind. The pregnancy rate for women under 35 with day 5 embryo transfers is 69 percent, compared to 57 percent for women with day 3 transfers, according to data from the Cleveland Clinic's IVF Laboratory.

"For some patients, you might get 15 eggs, and maybe 13 will fertilize and you have enough embryos that look good on day 3 to go out to day 5 without a problem," said Goldfarb. "But at the other end of spectrum, you might have a patient with only six or seven eggs, only three or four get fertilized, and by day 3, you only have two that look reasonable."

In that case, Goldfarb added, "it's better to transfer them on day 3."

The number of embryos transferred depends on the woman's age. But for women 35 and under, it's typically one or two, according to Goldfarb. So if only one or two embryos are thriving on implantation day, there's not much of a choice.

But the new study raises an interesting possibility for women with multiple embryos to choose from. Based on time-lapse imaging, the researchers were able to weed out embryos with an abnormal number of chromosomes – embryos that would likely fail to implant in the womb or result in a miscarriage. None of the embryos deemed the least healthy by the time-lapse technique resulted in a pregnancy or a live birth, according to the study.

"In some ways, it's more of a negative to get pregnant and miscarry," said Goldfarb. "That rollercoaster can be much more traumatic than not getting pregnant at all."

But the study does not break down the couples' ages and explain how that might have impacted their IVF success rate, noting only that they ranged in age from 25 to 47 with an average age of 36. Nor does it detail how long the embryos were observed in culture before being transferred into the womb, instead indicating that they were "cultured until 5 or 6 days" after fertilization. And while the study does suggest that technology can help in the embryo selection process, experts say the decision to undergo IVF and the odds of being successful vary from couple to couple.

"Obviously, the goal is to pick out the best embryos, and this study is certainly not the first to look at this technique," said Goldfarb, explaining how similar studies have found mixed results. "It's something still in play, and we'll how this sorts out in long run."

"But I think the one thing patients want to hear is your best assessment of their individual chance of getting pregnant," he added. "And you can get a pretty good estimate of that based on their age and some other characteristics."

Copyright 2013 ABC News Radio

iStockphoto/Thinkstock(NEW YORK) -- How much sleep you get might be at least partially determined by the color of your bedroom.

According to a recent survey, bedrooms decorated with more calm colors, like blue, yellow and green, often offer more sleep than those adorned with more stimulating colors. According to the U.K.'s Daily Mail, the survey showed that people whose bedrooms are blue get the most sleep, nearly eight hours on average. Comparatively, those with purple bedrooms get an average of under six hours of sleep.

Yellow, green, silver and orange bedrooms also offered more than seven hours sleep, which contributes to how a person might feel during the day.

According to the Daily Mail, the data relates to the way the human eye reacts to specific colors. Certain cells in the retina feed information the brain controlling body rhythms. Those cells happen to be most sensitive to the color blue.

Alternatively, purple is considered a stimulating color that drives creativity. With the color of their bedroom prompting the mind to keep working, even at night, people can be depriving themselves of important sleep.

Bedroom decoration can also affect people beyond sleeping patterns, says the Daily Mail. Couples who sleep in a caramel colored have sex three times per week on average, while those in red-colored bedrooms were intimate just once each week.

Similarly, couples with grey bedrooms spend the most time online shopping in bed, while silver bedrooms were often linked with more frequent exercise.

"Room color does influence your mood and set the tone for your living environment," Frances Whitley, in-house interior designer for Travelodge, told the Daily Mail.

Copyright 2013 ABC News Radio

The Copeland Family(NEW YORK) -- Aimee Copeland, the 25-year-old who lost her hands, both feet and her entire right leg to flesh-eating bacteria a year ago, has received two new bionic hands.

Copeland spent the week in Ohio at Touch Bionics, where she received two bionic hands free of charge. The hands cost $100,000 a piece, on average, a company spokesperson told ABC News.

Copeland spent the week getting fitted for the limbs and learning how to use them. The prosthetics respond to muscle signals in Copeland’s residual limbs and are capable of 24 different kinds of movements.

She will leave Touch Bionics to return to her Snellville, Ga., home Friday. Touch Bionics offered to donate the prosthetic hands because Copeland had run out of health insurance to pay for them herself, a company spokesperson said.

Copeland cut open her right leg falling from a zip line near the Tallapoosa River in Georgia in April 2012, allowing a deadly bacterium to enter her body. She said she sensed something wasn’t quite right days after receiving 22 stitches to close the wound on her calf because it hurt up to her thigh.

The bacteria advanced undetected until her leg turned “a dark purple color,” Copeland said on the set of ABC’s Katie talk show in September.

“I wasn’t able to walk,” she told show host Katie Couric. “I wasn’t able to speak. The only thing I was able to babble was, ‘I think I’m dying.’”

After being in and out of the emergency room with the painful wound that wouldn’t heal, doctors realized Copeland had necrotizing fasciitis and amputated her leg from the hip. Later, when her hands turned black, doctors amputated them, too.

Copeland spent two months in a hospital and another two months in rehabilitation before returning to her renovated home in late August 2012.

Copyright 2013 ABC News Radio

Goodshoot/Thinkstock(NEW YORK) -- H&M made headlines last month when it featured plus-size model Jennie Runk in its new swimwear ad campaign.

In an industry where swimwear is traditionally modeled by willowy or waifish models, Runk’s appearance in the retailer’s general -- not plus-size -- swimsuit campaign sent a strong message.

Runk, 24, is 5 feet, 10 inches tall, and wears size 12 or 14.

In an open letter this week posted on her Facebook page, and reprinted by the U.K.’s BBC News, Runk railed against the general obsession with size.

“People assume plus equates to fat, which in turn equates to ugly.  This is completely absurd because many women who are considered plus-sized are actually in line with the American average,” she wrote.

Runk, who was discovered when she was 13 years old, had a choice to lose weight and remain a size 4 or gain weight and kick-start her career as a plus-size model.

“I knew I was going to end up gaining weight anyway,” she said in an interview with ABC News’ Bianna Golodryga that aired Friday on Good Morning America.  “I was getting hips, I was growing into a woman, so I figured it was easier.”

That kind of confidence has served her well in an industry where some retailers -- most recently Abercrombie & Fitch -- don’t even offer clothing in her size.

Asked how she avoided negative thoughts about her body, Runk said, “I am the only one who can judge me.  My opinion is the only one that matters when it comes to me.”

Runk credits her success to the many other so-called plus-size models who blazed the trial before her, including Robyn Lawley, designer Ralph Lauren’s first plus-size model.

“I met a lot of them and they taught me a lot of what I know now,” Runk said.

Runk hopes she has helped start a conversation that may change attitudes about beauty and the so-called “mean girl” culture that sometimes comes along with  it.

“Our bodies are built to be naturally different sizes,” she said.  “To denote any of these body types negatively is only hurting all of us, because that’s where you get girls of one body type slamming another to make themselves feel better.”

Copyright 2013 ABC News Radio

iStockphoto/Thinkstock(NEW YORK) -- The changing climate could prove to be very troublesome for allergy sufferers.  Here are some of the possible effects:

Attack of Potent Pollen

In the past 53 years, carbon dioxide levels have risen globally, approximately 22 percent.  Much has been written about how the rise in greenhouse gases and that it's bad for the environment, but less has been said about how these gases can help some plants flourish.

Unfortunately for humans, these plants -- like poison ivy and ragweed -- tend to be irritating or even harmful to our health.  A 2005 study found that when ragweed plants, a prime cause of hay fever symptoms in late summer and fall, were exposed to higher carbon dioxide levels they not only produced more pollen, but the grains of pollen were covered with increased numbers of nose-irritating proteins, supercharging the pollen's allergic properties.

The study subjected ragweed plants in a lab setting to different carbon dioxide levels from three eras -- the preindustrial age, the present day and even the end of the 21st century.  The study found that the allergen concentrations increased 20 percent from the preindustrial age to today.  But they were projected to rise a startling 60 percent by the end of the century.

So the plants might be flourishing in 90 years, but anyone with a ragweed allergy will be miserable.

"They're growing faster, they're producing more flowers," said Dr. Lewis Ziska, a research plant physiologist at the United States Department of Agriculture and one of the study's authors.  "It's a two-edged sword...the [plants] that are responding have implications for public health."

Double Whammy Allergy Season

Traditionally, allergists break up the year into three distinct seasons.  In spring, it's the trees that cause the most problems; summer brings flowering grasses that induce sneezing; and in fall, ragweed pollen afflicts allergy sufferers with itchy, watery eyes.  

But as temperatures more common for July start showing up in April and May in certain areas of the country, plants react to the weather and not the calendar date.  

Increased overlap between allergy seasons means more pollen in the air and little relief for people hoping for a break between seasons.  However, even when there are multiple allergy seasons happening at once, allergists say there are things people can do to stave off the worst symptoms.

To keep pollen out of the home, experts recommend washing your face and changing your clothes after you arrive home and using a neti pot daily to help flush out irritating pollen grains.

A Milder Winter Might Mean a Miserable Spring

When the weather is warmer and seasons are milder, some plants will be releasing allergy-inducing pollen for longer periods of time.

A 2011 study looked at the length of the ragweed seasons in cities along different latitudes from Georgetown, Texas, to Saskatoon, Canada, over a 14-year period.  During that time, nearly all the cities experienced fewer days with frost and longer ragweed seasons.

Cities further north also had statistically larger increases to their ragweed allergy seasons.  The population of Saskatoon had to contend with a ragweed season 27 days longer in 2009 than in 1995.

Marooned on an 'Urban Heat Island' Means More Sneezing

According to the U.S. Census Bureau, more than 80 percent of Americans currently reside in urban areas.

While cities that lack greenery may seem like a safe place for people with pollen allergies, experts say they won't offer much sanctuary during allergy season.  That is partly because cities often become what scientists call "urban heat islands," where concrete and pavement soak up heat, resulting in consistently higher temperatures compared with surrounding rural areas.

With warmer temperatures and higher levels of carbon dioxide, some allergen-inducing plants can produce more pollen than the same plants located in rural areas.  

A 2003 study on allergen levels in Baltimore found more than three times the amount of ragweed pollen in the city compared with the surrounding rural areas.

Also, densely packed urban areas have higher levels of diesel and car exhaust, which can irritate the nose and throat, making allergy symptoms worse.

Copyright 2013 ABC News Radio

iStockphoto/Thinkstock(HOUSTON) -- Are able-bodied people gaming a system set up for people with limited mobility, and thus taking resources away from those in need?

An increasing number of air travelers are requesting wheelchairs at Houston-area airports, ABC Houston affiliate KTRK reports. An airport manager was quoted as telling the station, "We've handled maybe a hundred wheelchairs a year. Now there are some certain times we can handle a hundred wheelchairs in a day."

American Airlines told ABC News that while they haven't seen a noticeable uptick in wheelchair requests in Houston, the number of requests at New York's John F. Kennedy airport -- now about 600 per day -- has increased recently.

Anecdotal evidence from frequent fliers and advocates for people with disabilities suggests, however, that more people are taking advantage of the system. CEO of FareCompare.com and frequent flier Rick Seaney said he's seen an increase in the number of wheelchairs at the airport.

"I would put it on par with a variety of issues like abusing handicap status for parking, disability," he said. "There are always going to be a few that game the system potentially ruining it for the truly needy."

And that's really the heart of the matter: Not whether an able-bodied person has to wait a little longer in a security line at the airport for a person with a wheelchair to go ahead of them, but the fact that people who abuse the system limit resources for people who actually need them. What's worse, there's the potential that abuse of the system could become so rampant that lawmakers may actually dial back accommodations overall, hurting the people who actually need them.

"We've tried to be very careful about disability policy rights with lawmakers and have tried to find a balance," said Curt Decker, executive director of the National Disability Rights Network. "There should be reasonable service provided to people with disabilities so they can participate in society, but those services shouldn't be a burden to the rest of the community.

"When the system is exploited it raises questions about how services should be restricted [for people who truly need them]."

Travelers request wheelchair services and other special accommodations directly from the airline. For example, the American Airlines website has several pages dedicated to assisting travelers who need special accommodation. But there's no one-size-fits-all policy, which leaves room for people inclined to take advantage to do just that.

"Every person with a challenge or disability is different, and you are the best judge of the service you require," the website reads.

Decker said the airlines don't want to get too deep into their customer's personal lives, which may prevent them from asking probing questions regarding the person's claims about a disability. Plus, "there are a lot of hidden disabilities, sometimes you just don't know."

In other words, don't assume the person in the wheelchair cutting the security line doesn't truly need the assistance, even if they look perfectly capable to stand in line like everyone else.

But if you're tempted to game the system, keep in mind it's not a victimless crime. "If people who don't need the services use them, they take up resources and people who actually do need them won't have them available," said Decker.

"Whenever I'm at the airport I see airline personnel scrambling to find wheelchairs for all the people who need them. Especially on the flights to Florida."

Copyright 2013 ABC News Radio