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HEALTH
Your Bod
Nighttime twitches
When I’m falling asleep, my body twitches and, sometimes, it wakes me up. My friend says the same thing happens to her. Why?
These pre-snooze body movements are called hypnotic jerks. Just as you go to sleep, your heartbeat slows, your temperature falls, and your muscles relax. All this happens before your brain has completely powered down, explains pediatric sleep expert Dr. David Gozal, University of Louisville.
As your mind prepares for R&R, it fires off extra brain waves that cause your limbs to move a little. Researchers aren’t exactly sure why this happens, but they say nearly every person (with or without realizing it) experiences this before drifting to sleep.
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