Chorea and hemiballismus are both forms of involuntary movement disorders. Hemiballismus can cause sudden, violent, and flinging motions. Chorea can cause irregular, spontaneous, and nonrepetitive ...

Athetosis and chorea are two types of involuntary movements that can occur in children and adults with neurological conditions, such as cerebral palsy. The movements have different features, and the ...

Cerebral palsy affects around one in 345 children in the U.S., and more than half of them experience a problem called dystonia - involuntary and often painful muscle contractions, most commonly in the ...

When a person loses a leg above the knee, the nerves that once moved that leg don’t simply go quiet. They keep firing. The brain still sends signals down through what remains, still attempts to flex ...