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Reduced I1 response of cutaneomuscular reflex in Parkinson’s disease. The cutaneomuscular reflex obtained from abductor pollicis brevis muscle with superficial radial nerve stimulation showed reduced I1 response in two Parkinson’s disease patients (gray) compared to two normal subjects (red). (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)
