Myoclonus

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Myoclonus after a peripheral nerve block

Myoclonus is a rapid involuntary twiching of muscles. Myocloni are a side effect of many neurological conditons, but they can also happen in healthy people. As an example, twiching muscles when falling asleep are normal. Mycloni are a common symptom of epilepsy. Other less common diseses that provoke myocloni include encephalitis, Tics, and certain types of porphyria.

Certain analgesics can provoke myocloni.