Do you twitch when going to sleep? 😴 💤 Hypnic jerks — also called sleep starts — are sudden, involuntary muscle contractions you may experience as you are falling asleep. Hypnic is short for hypnagogic, a word that describes the transition between wakefulness to sleep, which is when these jerks occur. Hypnic jerks happen seemingly at random as you are falling asleep, and typically only affect one side of the body, such as your left arm and left leg! FOLLOW TO RELAX YOUR BODY! #sleep #health |