Brains disconnect as people sleep

By Bruce Bower, 15:53 PM April 15, 2008

Consciousness fades during sleep not because the brain shuts down but because it loses its capacity to integrate information via networks of interconnected areas, a new study suggests.

Giulio Tononi of the University of Wisconsin–Madison and his colleagues studied six adults who sat in reclining chairs with their eyes closed and gradually fell asleep. The researchers used a technique called transcranial magnetic stimulation to generate mild magnetic pulses that briefly activated the right-pre...

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