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Stress Puts Brake on New Neurons High levels of stress hormones inhibit neurons from regenerating in one part of the brain. The discovery, reported in the October Nature Neuroscience, could potentially lead to drugs that prevent or restore memory loss. For years, researchers thought that neurons in the human brain form only before birth. But about a year ago came the finding that neurons in a part of the hippocampus responsible for memory, called the dentate gyrus, continue to reproduce in adulthood (ScienceNOW, 29 October 1998). It was unclear, however, whether these neurons actually work. Researchers also discovered that this regeneration drops dramatically in the elderly. Full text at: http://www.apnet.com/inscight/10041999/grapha.htm |
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