Muscle sounds in Parkinson's disease.
BACKGROUND: A sound with a frequency of around 40 Hz can be heard, with a stethoscope, in the muscles of the hand and forearm during tonic contraction or movement. This sound is the acoustic correlate of the Piper rhythm seen in electromyographic records of muscle activity. The way in which motor ac...
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| Format: | Journal article |
| Language: | English |
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1997
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