Hypnic Jerk – Your Body Gone Haywire

Symptoms || Causes || Prevention Tips

What is a hypnic jerk?

You may notice that when you laying down in your bed after hours, when you half asleep, you just about to drift away and fall asleep. While suddenly your body decides that it has its own approach!! In this situation, suddenly you jerk violently, without apparent reason. This situation is called a hypnic jerk.

A  hypnic jerk, also known as a hypnagogic jerk, sleep start, sleep twitch, myoclonic jerk, or night start is an involuntary twitch which occurs when a person is beginning to fall asleep, often realize them to jump and awake suddenly for a moment. If you have found yourself in this situation, then remember that you were not the only one. The situation is something more common than you think.

The hypnagogic jerk is related to the actual movement as well as the feeling that you will come to experience. The main characteristic of a hypnagogic jerk is that it occurs suddenly and could easily disrupt your bedtime, leaving you feeling wide awake after the time of the jerk.

The jerk also creates the situation that you would lash out or move your legs and arms. Some people may jump up or twitch ever so slightly. In few cases, at the time of the jerk sleep twitch is accompanied by a scream or shout as your body reacts to the violent nature of the phenomenon.

In the time of the jerk :

  • Your heartbeat becomes fast.
  • You get quick breathing.
  • You get sweat.
  • Falling into the void.

Can you stop this jerk?  


The hypnagogic jerk is an involuntary muscle spasm. That’s why, if you try to stop it, you get failed. And at the jerk time, the person awake.

Is the hypnagogic jerk normal?

Don’t worry, this jerking is completely normal. Generally, jerk happens if you are :

  • not comfortable
  • ironically enough
  • really tired

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