Medically reviewed by Brigid Dwyer, MD Key Takeaways Involuntary muscle movements happen when your body moves without you intending it, like with tics or tremors.  The causes of involuntary movements ...

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 ...

Differentiating tardive dyskinesia from other movement disorders can be challenging. "One major criterion is the history of exposure to neuroleptic medications," said Jeff Bronstein, MD, PhD, of the ...

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 ...

Tardive dyskinesia (TD) is a rare movement disorder linked to long-term use of certain medications, especially dopamine receptor-blocking drugs like antipsychotics. Early TD symptoms often start with ...