ScienceDaily Health Headlines
for Sunday, July 31, 2011
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How bats stay on target despite the clutter (July 30, 2011) -- Neuroscientists have learned how bats can remain on target despite obstacles. The key lies in bats' neural response to echoes from their sonar pulses: Differences in delay as short as 3 microseconds between parts of an echo is enough to tell the bat the object may not be its target. The research could lead to more precise targeting by sonar-led vehicles. ... > full story
Mouse with 'off switch' in key brain cell population developed; Research may increase understanding of SIDS, depressive disorders (July 30, 2011) -- Scientists have developed a strain of mice with a built-in off switch that can selectively shut down the animals' serotonin-producing cells, which make up a brain network controlling breathing, temperature regulation and mood. The switch controls only the serotonin-producing cells, and does not affect any other cells in the animal's brains or bodies. ... > full story
Fast ripples confirmed to be valuable biomarker of area responsible for seizure activity in children (July 30, 2011) -- New research focusing on high-frequency oscillations, termed ripples and fast ripples, recorded by intracranial electroencephalography, may provide an important marker for the localization of the brain region responsible for seizure activity. According to the study the resection of brain regions containing fast ripples, along with the visually-identified seizure-onset zone, may achieve a good seizure outcome in pediatric epilepsy. ... > full story
Dissecting dyslexia: Linking reading to voice recognition (July 30, 2011) -- When people recognize voices, part of what helps make voice recognition accurate is noticing how people pronounce words differently. But individuals with dyslexia don't experience this familiar language advantage, say researchers. ... > full story
Motorcycle helmets hard on hearing (July 30, 2011) -- Motorcycle helmets, while protecting bikers' brains, may also be contributing to hearing loss. Scientists mapped the airflow and noise patterns to find out why. ... > full story
Breast screening has had little to do with falling breast cancer deaths, European study finds (July 30, 2011) -- Breast cancer screening has not played a direct part in the reductions of breast cancer mortality in recent years, according to a new European study. ... > full story
Oral interferon may prevent and control avian influenza virus infection (July 29, 2011) -- Avian influenza virus is a threat to the commercial chicken industry and, with its recent rapid spread across China, has also shown the ability for transmission from chickens to humans and other mammals. ... > full story
Cellular power plant genome mutates when reprogrammed: Genetic changes in mitochondrial genome of human induced pluripotent stem cells (July 29, 2011) -- Induced pluripotent stem cells (iPS cells) are truly talented multi-taskers. They can reproduce almost all cell types and thus offer great hope in the fight against diseases like Alzheimer's and Parkinson's. However, it would appear that their use is not entirely without risk: during the reprogramming of body cells into iPS cells, disease-causing mutations can creep into the genetic material. The genome of the mitochondria -- the cell's protein factories -- is particularly vulnerable to such changes, according to new research. Scientists encountered mutations in the mitochondrial genome of iPS cells. Because such genetic mutations can cause diseases, the cells should be tested for such mutations before being used for clinical applications. ... > full story
Packing on pounds riskier for South Asians, say researchers (July 29, 2011) -- A new study has found that some ethnic groups are more likely to be adding dangerous fat onto their internal organs like their liver when they gain weight, while others just add it to their waistline. ... > full story
Fair play -- a question of self-image? Researchers explain conditions under which people are prepared to behave fairly (July 29, 2011) -- Why do people behave selfishly and accept that their behavior may have negative consequences for others? Researchers in Germany investigated this question in a laboratory experiment. They found that such behavior often depends on whether information about the consequences for others can be ignored. Based on their findings, the researchers believe that conclusions can be drawn on, for instance, how the marketing of fair trade products could be improved. ... > full story
'Brain cap' technology turns thought into motion; Mind-machine interface could lead to new life-changing technologies for millions of people (July 29, 2011) -- "Brain cap" technology now being developed allows users to turn their thoughts into motion. Researchers have created a noninvasive, sensor-lined cap with neural interface software that soon could be used to control computers, robotic prosthetic limbs, motorized wheelchairs and even digital avatars. ... > full story
Traumatic brain injury linked with tenfold increase in stroke risk (July 29, 2011) -- Suffering a trauma to the brain may increase the risk of stroke tenfold within three months, according to new research. This is the first study to show a direct correlation between traumatic brain injury and stroke. Researchers suggest neuroimaging, intensive monitoring and stroke education for anyone incurring a traumatic brain injury. ... > full story
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