'Brain waves' challenge area-specific view of brain activity
Our understanding of brain activity has traditionally been linked to brain areas ? when we speak, the speech area of the brain is active. New research shows that this view may be overly rigid. The entire cortex, not just the area responsible for a certain function, is activated when a given task is initiated. Furthermore, activity occurs in a pattern: waves of activity roll from one side of the brain to the other.
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