Which term is used to describe REM sleep, emphasizing the paradox of brain activity with muscle atonia?

Which term is used to describe REM sleep, emphasizing the paradox of brain activity with muscle atonia?

• A. REM sleep
• B. NREM sleep
• C. Jet lag
• D. Paradoxical sleep

Answer: (D)

Paradoxical sleep is the term that highlights the strange mix seen in REM sleep: the brain is highly active—as if awake—while the body is effectively paralyzed due to muscle atonia. This combination, with rapid eye movements and dreaming, creates a paradoxical picture, which is why this label is used. In contrast, non-REM sleep features slower, synchronized brain activity and lacks the vivid dreams and muscle paralysis prominent in REM, and jet lag describes circadian disruption rather than a sleep stage’s intrinsic characteristics.

Paradoxical sleep is the term that highlights the strange mix seen in REM sleep: the brain is highly active—as if awake—while the body is effectively paralyzed due to muscle atonia. This combination, with rapid eye movements and dreaming, creates a paradoxical picture, which is why this label is used. In contrast, non-REM sleep features slower, synchronized brain activity and lacks the vivid dreams and muscle paralysis prominent in REM, and jet lag describes circadian disruption rather than a sleep stage’s intrinsic characteristics.