what is it called when you are lying down for a long period of time and your body jumps?


Question:
I think it has something to do with the muscles ...but I'm looking for the scientific name

Answers:
If this happens when you're starting to fall asleep, or just coming around to wakefulness, it's called a hypnic jerk, and it is nothing to worry about. It's not unusual...it's a type of generalized muscle twitch. Check out "hypnic jerk" on Wikipedia if you want to know more about it.

Other Answers:
It's a spasm. Normally this happens as you are starting to fall asleep.
an orgasm? :)


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