Question

question 4
at what stage of sleep is there no muscle movement?
○ gamma
○ circadian
○ delta
○ rem

Explanation:

Gamma refers to brain waves, not a sleep stage. Circadian is a 24-hour biological rhythm, not a sleep stage. Delta sleep is deep non-REM sleep with some muscle tone. REM sleep is characterized by muscle atonia, meaning no voluntary muscle movement.

Answer:

REM