The nurse knows the usual progression of sleep is:
a. NREM 1-4 then REM, then back through NREM 1 and 2.
b. REM then NREM 1-4, then back through NREM 2 and 3.
c. NREM 1-4 then back through NREM 3 and 2 then REM.
d. REM then NREM 1-4 then back through NREM 3.
ANS: C
The usual sleep sequence for a person is a fairly rapid progression through NREM 1 through 4, back through NREM 3 and 2, and then into REM sleep.
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