As the muscles in your body relax during Stage 1 sleep, the reflex muscle contraction that may happen is called
A)an autonomic cramp.
B)a hypnic jerk.
C)the restless leg syndrome.
D)the hypnogogic image syndrome.

Question

Quizplus · Accepted Answer

A hypnic jerk, also known as a hypnagogic jerk or sleep start, is a common involuntary muscle spasm that occurs as a person is falling asleep. It is characterized by a sudden jolt or sensation of falling, leading to muscle contractions.

As the Muscles in Your Body Relax During Stage 1