What is another word for slow-wave sleep?
Pronunciation: [slˈə͡ʊwˈe͡ɪv slˈiːp] (IPA) 
Slow-wave sleep is a crucial phase of sleep that occurs during the non-REM (rapid eye movement) stage. During this stage, the brain produces slow and synchronized electrical activity, which helps the body and mind to rest and heal. There are several synonyms for slow-wave sleep, such as Delta sleep, deep sleep, Stage 3 sleep, and N3 sleep. Delta sleep refers to the high amplitude, low-frequency brain waves that are generated during slow-wave sleep. Deep sleep signifies the most restful phase of sleep, where the body can perform essential metabolic functions. Stage 3 sleep is the transition between light and deep sleep, which typically lasts for 20-30 minutes each cycle. N3 sleep is the category of slow-wave sleep, with at least 20% of the brain waves at the delta frequency range.
