Benign myoclonus of infancy

Benign myoclonus of early infancy is characterized by episodes of myoclonic spasms involving flexion of the trunk, neck, and extremities in a manner resembling the infantile spasms of West syndrome. The spasms typically occur in clusters, only seen in waking state with no change in consciousness during the spells.
Onset common between 3- 9 months of age and cease within 2 weeks to 8 months.
Differentials include: West syndrome, myoclonic epilepsy syndromes, shuddering attacks
An EEG is usually necessary to exclude epilepsy syndromes of infancy which is essentially normal. The developmental and neurologic outcomes are normal
Treatment is not needed and movements are self-limited