PET and fMRI scans have revealed that the brain's activity during REM sleep is:
A) very similar to its activity during both wakefulness and NREM slow-wave sleep.
B) at its lowest level of activity during the night's sleep.
C) distinctly different from its activity during either wakefulness or NREM slow-wave sleep.
D) greatly increased in both the frontal lobes and the primary visual cortex.

Question

Quizplus · Accepted Answer

PET and fMRI scans have shown that the brain's activity during REM sleep is distinctly different from its activity during either wakefulness or NREM slow-wave sleep. During REM sleep, the brain is highly active in the areas of the brain responsible for memory consolidation, emotional processing, and visual imagery, as well as the brainstem regions that regulate sleep and arousal. This is in contrast to NREM slow-wave sleep, where the brain activity is characterized by slow and synchronized waves of activity, and wakefulness, where the brain activity is more varied and responsive to external stimuli.

PET and FMRI Scans Have Revealed That the Brain's Activity