dyskinesi

Dyskinesi, or dyskinesia, refers to involuntary, abnormal movements that can be brief or continuous. These movements may involve any part of the body, most often the face, tongue, limbs, or trunk. Dyskinesias can occur as a standalone condition or as a side effect of illness or medical treatment.

Classification and signs: Dyskinesias are broad and can present as choreiform (rapid, irregular movements), dystonic (sustained postures or repetitive twisting), or a combination of the two. Tardive dyskinesia is a well‑known form linked to long-term antipsychotic exposure, while levodopa‑induced dyskinesia occurs in Parkinson’s disease patients treated with dopaminergic therapy. Focal dyskinesias affect specific regions such as the face or neck; generalized forms involve multiple body regions.

Causes: Primary dyskinesias can be idiopathic. Secondary causes include medications (typical and atypical antipsychotics, metoclopramide, levodopa), neurodegenerative diseases (for example Parkinson’s or Huntington’s disease), stroke, metabolic disorders, and autoimmune or structural brain lesions.

Diagnosis: Diagnosis is clinical, based on history and examination. It is important to distinguish dyskinesia from tics, myoclonus, and tremor. Video assessment and standardized scales (such as the Abnormal Involuntary Movement Scale for tardive dyskinesia) may be used. Neuroimaging is typically employed to exclude other conditions.

Management: Treatment focuses on the underlying cause and reducing disability. In drug-induced cases, reduce or stop the offending medication or switch to a lower‑risk alternative. For Parkinson’s‑related dyskinesia, adjust dopaminergic therapy; amantadine may help. VMAT2 inhibitors (tetrabenazine, deutetrabenazine, valbenazine), botulinum toxin injections for focal dyskinesias, and deep brain stimulation are options for refractory cases. Rehabilitation can support function.

Prognosis: The course varies with cause and response to treatment. Some dyskinesias improve with medication changes; others may persist and require ongoing management.