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by Jon Hamilton


Scientists are beginning to understand why fearful memories are so persistent in the brain, and how they can be erased.


The research could help thousands of people with post-traumatic stress disorder, including many veterans, says Kerry Ressler, a psychiatrist at Emory University and investigator for the Howard Hughes Medical Institute.


In recent years, Ressler says, he’s been working with veterans from Iraq who survived incidents like being in a Humvee that was blown up by a bomb. Many are haunted by the memories.


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Copyright 2009 NPR



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