Definition of Dyskinesia

Dyskinesia: The presence of involuntary movements, such as the choreaform movements seen in some cases of rheumatic fever or the characteristic movements of tardive dyskinesia. Some forms of dyskinesia are side effects of certain medications, particularly L-dopa and, in the case of tardive dyskinesia, antipsychotic drugs.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=11214
Last Editorial Review: 3/19/2012