Involuntary twitching of muscles before going to sleep - is hypnagogic myoclonus Bashny.Net

Doctors call them "hypnagogic convulsions" or "sleepy jerks." These cramps are sudden contraction of the muscles of legs, arms, neck and / or head. This phenomenon is widespread and has no effect on health. Hypnagogic leg cramps appear if the nerve fibers reaching the muscles suddenly WHO * Uzhda simultaneously. These nerves in a bun with a thick almost crayon. Every nerve creates dramatic tension in a small part of the muscle fibers associated with it and extending the leg. When all the nerves of the beam at the same time, WHO * Oujda, a person feels a cramp.

Experts investigating the dream, can not say exactly what causes the contraction of muscle fibers, and why it appears it was during sleep. All of us are occasionally faced with it, but some people experience these seizures more often than others. The appearance of hypnagogic unpredictable seizures. However, clinical studies indicate that they often occur at the time when the neck muscles begin to relax before going to bed.

Source: Stephen Juan, «The odd body»

via factroom.ru