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Effect on Parkinsonian Signs and Symptoms of Bilateral Subthalamic Nucleus Stimulation Lancet 345:91-95, Limousin,P.,et al, 1995 See this aricle in Pubmed Article Abstract Quadripolar electrodes connected to a pulse generator were implanted in the subthalamic nuclei on both sides.Patients were evaluated with the unified Parkinson's disease rating scale and timed motor tests.3 months after surgery,activities of daily living scores had improved by 58-88%and motor scores by 42-84%.This improvement was maintained for up to 8 months in the first patient operated upon.One patient was confused for 2 weeks after surgery,and another developed neuropsychological impairment related to a thalamic infarction which improved over 3 months.In one patient, stimulation could induce ballism that was stopped by reduction of stimulation.This is the first demonstration in human beings of the part played by the subthalamic nuclei in the pathophysiology of Parkinson's disease.

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