By Gillian Fournier

Involuntary movements in certain neurological disorders such as Parkinson’s disease or psychosis; generally a side effect of medications used to treat the disorder.

Example: After taking neuroleptics for more than twenty years to treat her schizophrenia, a middle-aged woman displays sucking, licking, and pouting movements.

This website is a great resource for more information about this issue: http://www.ninds.nih.gov/disorders/tardive/tardive.htm

    Last reviewed: By John M. Grohol, Psy.D. on 18 Aug 2010


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