Word: neuroscientists
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...degrade. Signals peter out and fade away, and questions take their place: Do I know you? Who am I? But it's not just with Alzheimer's: the hippocampus also goes at least somewhat awry in normal memory loss. "It's relatively stable in volume till about 60," Harvard neuroscientist Randy Buckner explains, "and then begins to change. People with Alzheimer's disease, though--they slide off the cliff...
This could be a boon to middle-agers whose concentration is slipping, since studies show just how vital paying attention can be to forming memories. In one study, neuroscientist Dr. Adam Gazzaley of the University of California, San Francisco, recruited two groups of subjects--one ages 19 to 30 and the other 60 to 77--and scanned their brains while they were looking at pictures of human faces, then again when they were viewing landscapes. This allowed him to map out where in the brain they were taking in these images. Then he put the volunteers back in the scanner...
...your adrenal gland to pump out a supply of the stress hormone cortisol. Cortisol, in turn, tells your body to stop worrying about its basic metabolic needs and instead to "do the things you need to do to save yourself from whatever created the stress," says University of Virginia neuroscientist James Coan...
Believing or disbelieving something is always as much about feeling as fact. Sam Harris, a doctoral candidate at UCLA, wanted to see what that means in physiological terms. To many readers, Harris is best known for his antireligious book The End of Faith. But he is also a neuroscientist. In a study reported in the Annals of Neurology, Harris presented 14 people with 360 statements designed to elicit belief, disbelief or uncertainty. He tracked their brain response with a functional magnetic resonance imager (fMRI) and got some very revealing results...
...such vaccine, known as TA-CD (for "therapy for addiction - cocaine addiction"), is being developed by husband-and-wife team Dr. Thomas Kosten, a psychiatry professor, and Therese Kosten, a neuroscientist and psychologist, at Baylor College of Medicine in Texas. TA-CD has had success in early clinical trials: Now under review, a blinded, placebo-controlled study of 114 subjects showed that compared with the placebo group, people who received the vaccine were twice as likely to reduce their cocaine use by at least 50%. The Kostens are currently seeking approval from the Food and Drug Administration to go ahead...