Treatment of the symptoms of opsoclonus myoclonus include clonzaepam or valproate. These may decrease the severity of both the opsoclonus and the myoclonus.

Diagnosis is primarily arrived at through identification of concurrent opsoclonus and myoclonus.

Nocturnal myoclonus-- A disorder in which the patient is awakened repeatedly during the night by cramps or twitches in the calf muscles. Nocturnal myoclonus is sometimes called periodic limb movement disorder (PLMD).

Treatment of myoclonus is rarely entirely successful. The patient is likely to have some residual myoclonus even with the most successful treatments. Nonetheless, treatment may reduce frequency and severity

Myoclonus describes the sudden involuntary jerking of a muscle.
Nocturnal myoclonus