An incident that is caused by sleep and also occurs during sleep is known as a

An incidence that is caused by sleep and also occurs during sleep is known as a hypnic j erk. Further Explanation: A hypnic j erk is a brief and sudden contraction of the muscles of the body which occurs when a person is beginning to fall asleep. Hypnic j erks resemble the "jump" experienced by a person when startled, sometimes accompanied by a falling sensation. Hypnic j erks are associated with a rapid heartbeat, quickened breathing, and sweat.

Therefore, your answer is a hypnic j erk.

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