April 19, 2012 |
In some ways, parties seem like the worst possible places to socialize. A cacophony of voices -- not to mention a blaring stereo system -- make for a noisy environment in which to hear what a friend is saying. Hence the term "the cocktail-party effect," which refers to people's ability to focus on one speaker and tune out another. Now Nima Mesgarani and Edward F. Chang of UC San Francisco have figured out how the brain accomplishes this feat of selective hearing: The auditory cortex, which processes sounds, favors the voice that it needs or wants to hear.
April 19, 2012 |
A yearlong study of boxers' and mixed martial-arts fighters' brain activity has found those who fight for more than six years begin to experience damage and those who fight longer than 12 years expose themselves to an even greater decline each time they return to the ring. "What we've found suggests changes and damage in the brain happens years before symptoms emerge," said Dr. Charles Bernick, author of the study. "It's what we see in Alzheimer's and Parkinson's patients. " Bernick has supervised MRIs and computerized and cognitive tests of an estimated 170 fighters at the Cleveland Clinic's Las Vegas center in the past year.
March 21, 1986
Imprisoned financier Michele Sindona, who was once known as "God's Banker" because of his ties with the Vatican, was reported in a deep coma and near death, two days after being sentenced to a life term for ordering a murder. Sindona, 65, was taken ill as he ate breakfast at a prison in Voghera, Italy. He was reported to have been in a coma on arrival at a nearby hospital, where tests indicated no brain activity.
June 13, 2011 |
Could the teen brain identify chart-topping pop music hits -- and duds -- before a big-shot producer ever could? Perhaps, according to a study published online June 8 in the Journal of Consumer Psychology. Almost by accident, some previous research by Emory University scientists into the teen brain showed that adolescents' brain activity could potentially predict a song's ultimate success or failure. Back in 2006, Emory University neuroeconomist Gregory Berns had 27 teens between age 12 and 17 listen to 120 songs picked from Myspace that were relatively unknown artists without recording contracts, and measured the teens' brain activity.
September 13, 2012 |
Inside the human skull lies a 3-pound mystery. The brain - a command center composed of tens of billions of branching neurons - controls who we are, what we do and how we feel. "It's the most amazing information structure anybody has ever been able to imagine," says Dr. Walter Koroshetz, deputy director of the National Institute of Neurological Disorders and Stroke in Bethesda, Md. For centuries, the brain's inner workings remained largely unexplored. But all that is changing.
December 30, 2010 |
Anesthesia doesn't put patients to "sleep," as they're often told. Rather, anesthesia puts the brain into a state of unconsciousness that's more like being in a reversible coma than being asleep, a new study says. The study published in the New England Journal of Medicine on Thursday looked at how the brain behaves while asleep, in a coma and under general anesthesia. The brain activity of an anesthetized patient, for example, was more like a deeply unconscious coma patient than someone sleeping.
September 14, 2012 |
A group of scientists created a novel brain implant that improves cognitive performance and decision-making in a monkey. The device, developed in part by researchers at USC, manipulates ongoing brain activity to guide the animal away from mistakes and toward a correct decision. The study, published this week in the Journal of Neural Engineering, marks an important step toward implantable devices that could one day help people with brain injuries better perform basic tasks. The field of "brain prosthetics" has been dominated by efforts to restore physical abilities, like devices that use brain activity to move a robotic arm or a cursor across a screen.
November 15, 2012 |
In an unlikely pairing, two professional rappers have teamed up with researchers from the National Institutes of Health to study what happens in the brain during freestyle rapping. The results, published Thursday in the journal Scientific Reports , suggest that the process is similar to that of other spontaneous creative acts, including jazz improvisation. The study was initiated by the Los Angeles-based rappers Daniel Rizik-Baer and Michael Eagle and carried out by Allen Braun and Siyuan Liu of the NIH's National Institute on Deafness and Other Communication Disorders.