What happens to your brain when your mind is at rest?

Marcus Raichle For many years, the focus of brain mapping was to examine changes in the brain that occur when people are attentively engaged in an activity. No one spent much time thinking about what happens to the brain when people are doing very little. But Marcus Raichle, a professor of radiology, neurology, neurobiology and biomedical engineering at Washington University in St. Louis, has done just that. In the 1990s, he and his colleagues made a pivotal discovery by revealing how a specific ... More at http://www.nsf.gov/discoveries/disc_summ.jsp?cntn_id=133010&WT.mc_id=USNSF_51&WT.mc_ev=clickThis is an NSF News item.