The presence of sleep spindles and K complexes is the defining characteristic of:
A) narcolepsy.
B) stage 2 NREM sleep.
C) stage 3 and 4 NREM sleep.
D) REM sleep behavior disorder.

Question

Quizplus · Accepted Answer

Sleep spindles and K complexes are characteristics of stage 2 NREM sleep. Narcolepsy is characterized by excessive daytime sleepiness and REM sleep intrusion, stage 3 and 4 NREM sleep is referred to as slow-wave sleep, and REM sleep behavior disorder is characterized by a lack of muscle paralysis during REM sleep.

The Presence of Sleep Spindles and K Complexes Is the Defining