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Movement Disorders 

Movement Disorders
Chapter:
Movement Disorders
Author(s):

Andrea C. Adams

DOI:
10.1093/med/9780190206895.003.0012
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date: 22 October 2019

Movement disorders are neurologic syndromes in which movement is either excessive (hyperkinesia) or too little (hypokinesia). A general term used for both hyperkinesia and hypokinesia is dyskinesia, which is defined as difficulty performing voluntary movements. The prototypic hypokinetic movement disorder is Parkinson disease (PD). Other terms used to describe this movement disorder are bradykinesia (slowness of movement) and akinesia (loss of movement).

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