Multitasking Brain Divides And Conquers, To A Point - 2 views
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Lara Cowell on 07 May 12Our brains are set up to do two things at once, but not three, a French team reports in the journal Science. Their experiment examined an area of the brain involved in goals and rewards and tested people's abilities to accomplish up to three mental tasks at the same time. When volunteers were doing just one task, there was activity in goal-oriented areas of both frontal lobes, suggesting that the two sides of the brain were working together to get the job done. But when people took on a second task, the lobes divided their responsibilities. Since the brain has only two frontal lobes, researchers surmised there might be a limit to the number of goals and rewards it can handle. Indeed, when people started a third task, one of the original goals disappeared from their brains. Also people slowed down and made many more mistakes.