Loss of visual feedback revealing motor impairment – an early symptom of Parkinson’s disease in two Irish farmers

摘要

BackgroundIn the absence of visual feedback, humans depend upon proprioceptive information for reaching movements and coordination. Use of sensory information in order to assist movement is impaired in patients with early Parkinson’s disease (PD). It has been postulated that patients with PD compensate for this kinaesthetic deficit by relying on visual information.