Dr. Stuart Goodman of St. Vincent Healthcare talks about the process of implanting devices in a patient's brain to stimulate areas to reduce tremors in Parkinson's patients on Feb. 7, 2011 in Billings, Mont. Larry Leininger 73, right of Billings had the procedure done twice to help his severe tremors. (AP Photo/Billings Gazette, David Grubbs)
Read the article: Brain pacemakers may help block psychiatric disease
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