During REM sleep, brain activity and blood flow increases from wakefulness, especially in the cerebral cortex, midbrain, and brainstem core. Which sleep stage shows this increase?

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Multiple Choice

During REM sleep, brain activity and blood flow increases from wakefulness, especially in the cerebral cortex, midbrain, and brainstem core. Which sleep stage shows this increase?

REM sleep features desynchronized, wake-like brain activity with increased cerebral blood flow and metabolic demand, especially in the cerebral cortex, midbrain, and brainstem. This contrasts with non-REM stages, where brain activity and blood flow are reduced, while Stage 2 remains a non-REM phase with lower activation overall. Since wakefulness would show even higher activity but isn’t a sleep stage, the stage that shows this rise in activation is REM sleep.

REM sleep features desynchronized, wake-like brain activity with increased cerebral blood flow and metabolic demand, especially in the cerebral cortex, midbrain, and brainstem. This contrasts with non-REM stages, where brain activity and blood flow are reduced, while Stage 2 remains a non-REM phase with lower activation overall. Since wakefulness would show even higher activity but isn’t a sleep stage, the stage that shows this rise in activation is REM sleep.

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