Chorea sancti viti

Chorea (disease)

Chorea sancti viti (Latin for "St. Vitus' dance") is an abnormal involuntary movement disorder, one of a group of neurological disorders called dyskinesias. The term chorea is derived from a Greek word χορεία (a kind of dance, see chorea), as the quick movements of the feet or hands are vaguely comparable to dancing or piano playing.

Presentation

Chorea is characterized by brief, irregular contractions that are not repetitive or rhythmic, but appear to flow from one muscle to the next.

These 'dance-like' movements of chorea (from the same root word as "choreography") often occur with athetosis, which adds twisting and writhing movements. Lumps called nodules may also form under the skin in bony areas.

Causes

Chorea can occur in a variety of conditions and disorders.

Ballism

When chorea is serious, slight movements will become thrashing motions; this form of severe chorea is referred to as ballism. Walking may become peculiar, and include odd postures and leg movements. Unlike ataxia and dystonia, which affect the quality of voluntary movements or parkinsonism, which is a hindrance of voluntary movements, the movements of chorea and ballism occur on their own, without conscious effort.

Treatment

There is no standard course of treatment for chorea. Treatment depends on the type of chorea and the associated disease.

Although there are many drugs that can control Chorea, there is no known cure.

Cause Treatment
Huntington's disease A common treatment is dopaminergic antagonists, although treatment is largely supportive.
Sydenham's chorea Usually involves antibiotic drugs to treat the infection, followed by drug therapy to prevent recurrence.
Drug-induced chorea. Adjusting medication dosages.
Metabolic and endocrine-related choreas Treated according to the cause(s) of symptoms.

See also

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