Chorea in Huntington Disease

Huntington disease (HD) is a hereditary progressive neurodegenerative disorder, in which neurons within the brain break down, resulting in motor, cognitive and psychiatric symptoms. Symptoms generally appear between the ages of 30 to 50 and worsen over a 10 to 25-year period. Many patients with HD experience chorea, a troublesome involuntary movement disorder, in which patients develop abnormal, abrupt or irregular movements. Chorea can affect various body parts, and interfere with speech, swallowing, posture and gait. HD is estimated to affect approximately 30,000 adults in the United States, with more than 200,000 at risk of inheriting the disease.