Opsoclonus Myoclonus Syndrome

**Semantic type:** Disease or Syndrome

**Definition:** A combination of opsoclonus (involuntary conjugate eye movements of large amplitude) and myoclonic jerks. This can be a paraneoplastic syndrome (a result of brain metastasis) or post-infectious (viral encephalitis).

**Synonyms:** - Opsoclonus-Myoclonus Syndrome