Parkinson's Research

** HOLD FOR RELEASE AT 4 P.M. EST ** Sharon Pederson poses for a photograph with Kellen, her Norwegian lundehund dog, at a friend's house in Petaluma, Calif., Monday, Jan. 5, 2009. Pederson is a study subject who got deep brain stimulation, or DBS, surgery for her Parkinson's disease. In DBS, a surgeon implants electrodes in the brain which are then connected to a pacemaker-like device that can be adjusted and turned off and on. The device sends tiny electrical pulses to the brain, disabling overactive nerve cells. (AP Photo/Jeff Chiu)

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