Final answer:
Nonrapid Eye Movement (NREM) Sleep Disorder is a sleep disorder that occurs during the non-REM phases of sleep. It is characterized by relatively low levels of physical activity and reduced sensory awareness. This disorder is different from REM Sleep Behavior Disorder, which involves high levels of physical activity during REM sleep.
Step-by-step explanation:
Nonrapid Eye Movement (NREM) Sleep Disorder refers to a sleep disorder that occurs during the non-REM phases of sleep. Non-REM sleep is characterized by relatively low levels of physical activity and reduced sensory awareness.
This disorder is different from Rapid Eye Movement (REM) Sleep Behavior Disorder, which is a sleep disorder where the muscle paralysis associated with the REM sleep phase does not occur, resulting in high levels of physical activity during REM sleep.
Non-REM Sleep Disorder is a form of parasomnia, which is a group of sleep disorders characterized by unwanted and disruptive motor activity or experiences during sleep.