Is there an exact moment we fall asleep?

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Is there an exact moment we fall asleep?

In: Biology

11 Answers

Anonymous 0 Comments

You can’t sense when we drift off to sleep, but we have all had instances where the light switch is turned off by our brain and it fails needing a reset.

Enter hypnic jerk. Ever start to fall asleep and you quickly jerk awake?

Your body needs itself paralyzed before going off to dreamland. Before turning off the lights your brain shoots off a “jerk” to your muscles to see if your are actually ready for sleep. If you are ready for sleep this jerk has zero effect, but if your motor system is still online then you jerk awake; this is intentional.

If the jerk wakes you it’s intended to restart the sleep process correctly to ensure the series of events that need to happen occur in the correct order.

The jerk for me usually happens when I am really tired like after a day of spending a long time in the sun.

As to your question I would say after this jerk is when you fall asleep.

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