A new study at the University of Iowa reports a potential link between stress hormones and short-term memory loss in older adults. The study, published in the Journal of Neuroscience, reveals that having high levels of cortisol—a natural hormone in our body whose levels surge when we are stressed—can lead to memory lapses as we age.
Bringing clarity to a decades-long debate, a national team of researchers led by experts from the Perelman School of Medicine at the University of Pennsylvania has found that adding clot-busting medications known as thrombolytics to conventional approaches when treating sudden-onset pulmonary embolism patients is associated with 47 percent fewer deaths than using standard intravenous or under-the-skin anticoagulant medications alone.
One in 10 Americans has hearing loss that affects their ability to understand normal speech. Exposure to excessive noise also can damage hearing in higher pitches. “Hearing loss due to excessive noise is totally preventable, unlike hearing loss due to old age or a medical condition,” Dr. Bhayani says.
In a further test of a novel theory that suggests autism is the consequence of abnormal cell communication, researchers at the University of California, San Diego School of Medicine report that an almost century-old drug approved for treating sleeping sickness also restores normal cellular signaling in a mouse model of autism, reversing symptoms of the neurological disorder in animals that were the human biological age equivalent of 30 years old.
Sandia researchers have come up with a way to make titanium-dioxide nanoparticles, which have a variety of uses in everything from solar cells to LEDs. Titanium-dioxide nanoparticles show great promise, but industry has largely shunned them in the past because they’ve been difficult and expensive to make.
Explosions are the most common cause of traumatic brain injuries in veterans returning from Iraq and Afghanistan. A new study shows that military personnel with mild brain trauma related to such blasts had outcomes similar to those with mild brain injury from other causes, according to researchers at Washington University School of Medicine in St. Louis.
Confirming what neurocomputational theorists have long suspected, researchers at the Dignity Health Barrow Neurological Institute in Phoenix, Ariz. and University of California, San Diego School of Medicine report that the human brain locks down episodic memories in the hippocampus, committing each recollection to a distinct, distributed fraction of individual cells.
NASA's Hubble Space Telescope will be used to search for a suitable Kuiper Belt object that NASA's New Horizons space probe could visit. It would be our first and perhaps last look at such a remote relic from the distant past. The search is very challenging even for Hubble's sharp vision. It has to find something the size of Manhattan Island, as black as charcoal, and embedded against a snowstorm of background stars.
Before it can fertilize an egg, a sperm has to bind to and bore through an outer egg layer known as the zona pellucida. Researchers now identify the protein in the zona pellucida that sperm latch onto.
A new study suggests that the politically induced decline in the strength of worker unions may play a much more pivotal role in income inequality than previously understood.
Chairs provide great support during long meetings, but they may also be holding us back. Standing during meetings boosts the excitement around creative group processes and reduces people’s tendencies to defend their turf, according to a new Washington University in St. Louis study that used wearable sensors to measure participants’ activity levels.
An imbalance of female sex hormones among men in Western nations may be contributing to high levels of male obesity, according to new research from the University of Adelaide.
Researchers at the University of California, San Diego School of Medicine have found that persons with lower blood levels of vitamin D were twice as likely to die prematurely as people with higher blood levels of vitamin D.
Columbia Engineering professor Elizabeth M. C. Hillman has identified a new component of the biological mechanism that controls blood flow in the brain, demonstrating that the vascular endothelium plays a critical role in the regulation of blood flow in response to stimulation in the living brain. Understanding how and why the brain regulates its blood flow could provide important clues to understanding early brain development, disease, and aging.
Georgia Tech researchers froze ant rafts and scanned them with a miniature CT scan machine to look at the strongest part of the structure – the inside – to discover how opaque ants connect, arrange and orient themselves with each other.
A Kansas State University assistant professor of human nutrition explains why you should be cautious when choosing a supplement and what to look for to get the most accurate product.
People with diets higher in protein, especially from fish, may be less likely to have a stroke than those with diets lower in protein, according to a meta-analysis published in the June 11, 2014, online issue of Neurology®, the medical journal of the American Academy of Neurology.
Researchers using ALMA report the first-ever detection of molecular gas -- the fuel for star formation -- in two galaxies that were previously rocked by gamma ray bursts (GRBs), the brightest explosions in the Universe.
White-bread lovers take heart. Scientists are now reporting that this much-maligned food seems to encourage the growth of some of our most helpful inhabitants — beneficial gut bacteria. In addition to this surprising find, their study in ACS’ Journal of Agricultural and Food Chemistry also revealed that when looking at effects of food on our “microbiomes,” considering the whole diet, not just individual ingredients, is critical.
On opposite sides of the globe over millions of years, the snakes of North America and Australia independently evolved similar body types that helped them move and capture prey more efficiently.
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