Last Updated
：2025/11/29
hypnic jerk
Noun
Japanese Meaning
入眠直前に起こる、不随意の筋肉の痙攣（瞬間的な意識の覚醒を伴うことがある） / 眠りに落ちかける際に発生する突然の筋肉反応
（ plural ）
Quizzes for review
An involuntary twitch which occurs just as a person is beginning to fall asleep, often causing momentary wakefulness.
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hypnic jerk
I was almost asleep when a sudden hypnic jerk startled me awake, making me jump and check the time.
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I was almost asleep when a sudden hypnic jerk startled me awake, making me jump and check the time.
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