Hypnic jerk

Causes of Fatigue Slideshow Pictures

Medical Definition of Hypnic jerk

Hypnic jerk: The common normal phenomenon of jerking awake, usually accompanied by a feeling of falling, just as one is drifting off to sleep. Also called a sleep jerk or sleep start.


Quick GuideThe 14 Most Common Causes of Fatigue

The 14 Most Common Causes of Fatigue

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Reviewed on 6/14/2012

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