Master the Sleep Sciences: Ace Your CPSGT & RPSGT Exam 2026 – Dream Big and Conquer!

Question: 1 / 400

What are the four stages of non-REM sleep?

N1, N2, N3, and N4

N1, N2, N3, and REM

N1, N2, N3, and N4 with transitions

N1, N2, REM, and awake

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