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Paroxysmal Movement Disorders 

Paroxysmal Movement Disorders
Chapter:
Paroxysmal Movement Disorders
Author(s):

Melissa J. Armstrong

and William Weiner

DOI:
10.1093/med/9780199609536.003.0026
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date: 21 October 2021

Paroxysmal movement disorders are characterized by distinct episodes of abnormal movements. These episodes have abrupt onset, variable duration, and a discrete conclusion on top of a normal or stable neurological baseline. Clinical phenomenology during the attacks is divided into dyskinesia—including chorea, athetosis, dystonia, and/or ballismus—and ataxia. By convention these are labelled paroxysmal dyskinesias and episodic ataxias. Because of the intermittent nature of these movement disorders, diagnosis is usually made from clinical and family history. Recent advances in genetics have identified causative mutations for many of these disorders.

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