Terms in this set (20)
stage 1 - brain waves small and irregular, feel yourself drifting on the edge of consciousness; stage 2 - short bursts of rapid, high peaking waves called sleep spindles, minor noises won't disturb you; stage 3 - stage 2 waves and delta waves, very slow with high peaks, breathing and pulse are slowed, muscles relaxed, and hard to rouse; stage 4 - delta waves prevalent, deep sleep, difficult to rouse.