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Physiological observations in Sydenham's chorea.

By M Hallett and C Kaufman


Involuntary movements in a patient with Sydenham's chorea were usually characterised by bursts of EMG activity lasting more than 100 ms, occurring asynchronously in antagonist muscles. The "hung-up" knee jerk was a choreic movement induced by the tendon tap. Exaggerated voluntary movements were produced with EMG burst longer than normal

Topics: Research Article
Year: 1981
DOI identifier: 10.1136/jnnp.44.9.829
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Provided by: PubMed Central
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