Have you ever twitched just as you are falling asleep? Maybe you have but you haven’t been aware of it. It is believed that up to 70% of people experience a sudden jerk in that few moments between being awake and being asleep. This involuntary muscle spasm is known as a hypnic jerk, sleep start or hypnagogic jerk, and as inferred above, is quite common. But what is hypnic … [Read more...] about Hypnic (Hypnagogic) Jerking Explained: What is Hypnic Jerking