A big, convulsive twitch while dozing off? Sleep experts explain the ‘hypnic jerk’

You’re gently drifting off to sleep when suddenly your arms and legs convulse and you jolt yourself awake. Or, perhaps you’re relaxing in bed when, out of the blue, your dozing partner does an almighty twitch, scaring you half to death.

This article was originally published on MedicalXpress.com

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