Slow-wave sleep



Slow Wave Sleep (SWS) is a term used to describe stages 3 and 4 sleep.

Electroencephalographic Characteristics
Large 75 microvolt delta waves predominate the electroencephalogram.

Predominates the first third of the night.

Characteristics
SWS is often referred to as deep sleep. This is probably due to the often intense groggy feeling one gets when awoken from this stage. If deprived of sleep, there is a sharp rebound of SWS, suggesting a "need" for this stage.

慢波睡眠