A hypnic jerk is a sudden muscle twitch that occurs right before falling asleep, caused by the brain misinterpreting the body's natural relaxation as a sign of falling, which triggers a quick muscle jerk as a protective survival mechanism.
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Why Your Body Jolts Before Falling Asleep 🧠💤Added:
Why does my boyfriend's body twitch right before I fall asleep? That sudden twitch is called a hypnic jerk.
>> [music] >> It feels like my legs just jumped on their own. As your body relaxes, your brain can misread it as falling and trigger a [screaming] quick muscle jerk.
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