Can anyone help give me more info? My baby girl started getting muscle jerks and twitches all over right at 8 months old whenever going to sleep, but they also happen in clusters maybe twice per night, waking her up startled and upset. It seems to match up with benign neonatal sleep myoclonus but looking online bnsm occurs typically from birth and disappears by 6 months... Is this the beginning of adult sleep myoclonus? Has anyone else out there gone through this?