DefinitionJerky body movements is a condition in which uncontrolled, purposeless, rapid motions interrupt normal movement or posture.Alternative NamesJerky body movements; Chorea; Muscle - jerky movements (uncontrolled); Hyperkinetic movementsConsiderationsTypical movements of chorea (called tics) include facial grimacing, raising and lowering the shoulders, bending and extending the fingers and toes. The condition can affect one or both sides of the body.These involuntary movements are generally not repetitive and can appear purposeful even though they are involuntary and uncontrollable. A person with chorea may be viewed as jittery or restless.Common CausesThere are many possible causes of unpredictable, jerky movements, including Sydenham's chorea, Huntington's disease, Wilson's disease