THINKING AWAY ALZHEIMER'S DISEASE
In the late 1990s, Richard Davidson, a neuroscientist and psychologist at the University of Wisconsin's Laboratory for Affective Neuroscience, flew eight of the Dalai Lama's most seasoned meditators to his lab in Wisconsin, There, Davidson attached hundreds of EEG sensors to each monk's scalp to record electrical activity in many different areas of the brain as they meditated. After 15 seconds, according to the EEG readings, the monks’ brains did not slow down, as is usually expected in meditation; they began speeding up. In fact, they were activated on a scale neither Davidson nor any other scientist had ever seen. The monitors showed sustained bursts of high gamma-band activity—rapid cycles of 25-70 Hz. The gamma band, the highest rate of brain-wave frequencies, is employed by the brain when it is working its…