REM sleep characteristics
Which feature characterizes REM sleep?
Answer A: explanation for every choice
A
Correct. In REM sleep the EEG resembles wakefulness, vivid dreams occur, and most skeletal muscles are paralyzed.
B
Delta waves characterize N3 (slow-wave) sleep.
C
Sleep spindles and K-complexes characterize N2 sleep.
D
Sleepwalking occurs during N3 sleep, when muscles are not paralyzed.
TakeawayREM: brain active, body paralyzed, vivid dreams. N2: spindles and K-complexes. N3: delta waves, sleepwalking, night terrors.
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Reviewed 2026-11-05 by a medical student. Spot an error? Report it with question ID ps38.