Why Do I Jump in My Sleep?

Why Do I Jump in My Sleep?. Part of the series: Sleep Problems. When a person jumps in their sleep, these movements are called myoclonic twitches, and it's theorized that these are caused by a body that relaxes too quickly or a brain that is aware of becoming unconscious. Discover why myoclonic twitches aren't a great cause for concern with help from a psychologist in this free video on moving while sleeping.