Which of the Following Statements About Brain Activity During Sleep

question 212

Multiple Choice

Which of the following statements about brain activity during sleep is TRUE?

• A) There is no abrupt change from NREM to REM sleep; instead, each 90-minute cycle of NREM and REM sleep reflects the gradual changing balance of REM-off and REM-on neuronal activity.
• B) PET scans have revealed that there are no differences in brain activity during REM and NREM sleep.
• C) The frontal lobes and the primary visual cortex are much more active during REM sleep than they are during wakefulness.
• D) There is a distinct and abrupt change in the brain as a person goes from NREM to REM sleep as REM-on neurons suddenly become very active.

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