N2 sleep is to ________ as N3 sleep is to ________.

A) alpha waves;sleep spindles
B) sleep spindles;delta waves
C) delta waves;alpha waves
D) alpha waves;rapid eye movements

Sleep Spindles

Short bursts of brain activity occurring during stage 2 of sleep, thought to play a role in memory consolidation and learning.

Delta Waves

Slow brainwaves primarily associated with deep sleep and regenerative states of rest.

Alpha Waves

Brain waves detected by an EEG that are associated with a state of relaxed alertness.