Sleep spindles and K-complexes are most often associated with ___ sleep.
A. stage 1
B. stage 2
C. stage 3 and stage 4
D. REM
Answer: b. stage 2
Sleep spindles and K-complexes are most often associated with ___ sleep.
A. stage 1
B. stage 2
C. stage 3 and stage 4
D. REM
Answer: b. stage 2