Hiroyasu Furuyama
Clinical Brain Research Laboratory, Department of Neurology, Toyokura Memorial Hall, Sapporo Yamanoue Hospital, Sapporo 063-0006, Japan
Publications
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Research Article
Difficulty in Terminating Posture of Three-Dimensional Gait Bradykinesia in Parkinson's Disease
Author(s): Tateo Warabi*, Hiroyasu Furuyama, Mami Okada and Nobuo Yanagisawa
This study investigated whether difficulty in initiating volitional gait in patients with Parkinson’s disease stems from impaired termination of the preceding posture or impaired initiation of new movement. Forty-one patients with Parkinson’s disease and 15 age-matched controls participated. While participants fixated on a conditioning visual target, a visual cue test stimulus prompted participants to initiate volitional gait. Three-dimensional sole-floor reaction forces during coordinated gait movement, antagonist/ agonist electromyography (EMG), and levodopa therapy were recorded. From the visual cue, gait initiation was measured by tibialis anterior EMG burst onset (EMG-on latency) and coordinated gait movement onset, whereas preceding postural termination latency was measured by the pause in antagonist soleus tonic EMG activity (EMG-off latency). Three visual fixat.. Read More»