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Motor symptoms of Parkinson's disease before (PRE) and after (POST) implantation of deep brain stimulation (DBS) electrodes as measured with the Unified Parkinson's Disease Rating Scale (UPDRS) motor score (part III). The subscript notation ON and OFF denotes the state of medication. For the PRE sessions, ON and OFF refer to the levodopa treatment, and for the POST sessions, ON and OFF refer to DBS treatment. The bars indicate mean values (across patients) ± standard deviation.
