Which statement about REM sleep is true?

Prepare for the Certification in Clinical Sleep Health exam. Use flashcards and multiple-choice questions with hints and explanations. Ace your exam!

Multiple Choice

Which statement about REM sleep is true?

Explanation:
REM sleep features intense brain activity, with EEG patterns that resemble wakefulness and dreaming. This neuronal firing drives higher metabolic demand in the brain, so oxygen use rises during REM compared with non-REM sleep. Measurements of cerebral oxygen consumption show that CMRO2 increases in REM, approaching wake-like levels, whereas non-REM sleep exhibits reduced brain metabolism. Therefore, brain oxygen consumption is increased during REM sleep. The other possibilities don’t fit because REM is not a state of lower or unchanged brain metabolism, and while there can be variability across cycles, the general pattern is elevated oxygen use relative to non-REM.

REM sleep features intense brain activity, with EEG patterns that resemble wakefulness and dreaming. This neuronal firing drives higher metabolic demand in the brain, so oxygen use rises during REM compared with non-REM sleep. Measurements of cerebral oxygen consumption show that CMRO2 increases in REM, approaching wake-like levels, whereas non-REM sleep exhibits reduced brain metabolism. Therefore, brain oxygen consumption is increased during REM sleep. The other possibilities don’t fit because REM is not a state of lower or unchanged brain metabolism, and while there can be variability across cycles, the general pattern is elevated oxygen use relative to non-REM.

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