Skip to Content


Pronunciation: ath′ĕ-tō′sis

Definition: A condition in which there is a constant succession of slow, writhing, involuntary movements of flexion, extension, pronation, and supination of the fingers and hands, and sometimes of the toes and feet. Usually caused by an extrapyramidal lesion.

Synonym(s): extrapyramidal cerebral palsy, Hammond disease

[G. athetos, without position or place]

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.