subconscious

circadian rhythm

REM or rapid eye movement sleep

NREM or non rapid eye movement sleep

alpha waves

sleep spindles

Restoration theory of sleep

adaptive theory of sleep

psychoanalytic/psychodynamic view

manifest content

latent content

activation synthesis theory

information processing theory

insomnia

narcolepsy

sleep apnea

night terrors

REM rebound

hypnosis

Ernest hilgard and the hidden observer

psychoactive drugs

agonistic drugs

antagonistic drugs

withdrawal

tolerance

depressants

stimulants

opiates

hallucinogens