Mind numbing

 作者:沈迟     |      日期:2019-03-07 06:05:16
By Helen Pearson A good pair of dentures may fend off dementia. That’s the message from Japanese researchers, who say that chewing helps prevent memory loss as we grow old. New memories are briefly stored in the hippocampus, a brain area critical for learning. But as we age, hippocampal cells start to deteriorate and our short-term memory gets worse. Elderly people with missing teeth often chew less, too, and some studies have suggested that bad memory and tooth loss might be linked. To put this idea to the test,