Abstract
IMPAIRMENT of speech, leading sometimes to unintelligibility, was recognized by Parkinson1 to be part of the disease which now bears his name. Reduced voice volume, dysarthria and prosodic monotony are common manifestations of Parkinsonism2 and are generally attributed to hypokinesis, a cardinal feature of the disease, the physiological basis of which is ill understood. The term itself is difficult of definition, but it is generally thought to imply a delay in initiation of movement combined with slowness and restriction in amplitude of movements once initiated.
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MAWDSLEY, C., GAMSU, C. Periodicity of Speech in Parkinsonism. Nature 231, 315–316 (1971). https://doi.org/10.1038/231315a0
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DOI: https://doi.org/10.1038/231315a0
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