Sleep Stage

Description

EEG waveform

· Awake and alert

Beta

· Awake and eyes closed

Alpha

Stage N1

· Light sleep

· Slow heartbeat, breathing, eye movements

· Relax muscles

· Slow brain waves

Alpha, Theta (5)

Stage N2

· Deeper sleep

· Descend Body temperature

· Stop eye movement

· Slow brain wave activity

Alpha, Theta spindle waves, K complexes (5)

Stage N3

· Deepest non-REM sleep

· Lowest heartbeat and breathing

· Slower brain wave activity

Delta,

spindle waves (5)

REM

· Dreaming

· Faster and irregular breathing

· Increase heart rate and blood pressure

· Temporary paralyzed muscle

Delta (5)