An undated image of a brain scan provided by the University of Iowa Department of Neurology, shows an MRI scan of patient SM's brain. The arrows point to the amygdala, the region of the brain which SM... more 
An undated image of a brain scan provided by the University of Iowa Department of Neurology, shows an MRI scan of patient SM's brain. The arrows point to the amygdala, the region of the brain which SM is missing, as shown by the vacant black holes underneath the arrows. less 
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Associated Press | Photo By University of Iowa Department of Neurology
Thu, Dec 16, 2010 11:10 PM EST