Sleep spindles usually first appear in NREM Stage __________ sleep.
A) 1
B) 2
C) 3
D) 4

Name: Sleep spindles usually first appear in NREM Stage __________ sleep. A) 1 B) 2 C) 3 D) 4
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Sleep spindles typically first appear in NREM Stage 2 sleep, which is characterized by a slower heart rate, decreased body temperature, and a decrease in muscle activity compared to wakefulness. In Stage 2 sleep, brain activity slows down with occasional bursts of rapid electrical activity known as sleep spindles.

Sleep Spindles Usually First Appear in NREM Stage __________ Sleep