They contractions begin in one region of the body and spread to muscles in other areas.

Pathologic myoclonus may involve persistent, shock-like contractions in a group of muscles and is more widespread in general.This form occurs in healthy people, causes no difficulties, and does not require medical treatment. Examples are hiccups and the jerks or “sleep starts” that some people experience while drifting off to sleep. Physiologic myoclonus involves quick muscle twitches followed by relaxation.Myoclonus can be broadly categorized into two types: In response to an external event or when a person attempts to make a movement.Either alone or in sequence, in a pattern of movement or without pattern.Myoclonic jerks may occur in the following scenarios: Myoclonus is not a disease itself, rather it describes a clinical sign. The twitching cannot be stopped or controlled by the person experiencing it. Myoclonus refers to sudden, brief involuntary twitching or jerking of a muscle or group of muscles.

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