subconscious

sleep spindles

REM or rapid eye movement sleep

NREM or non rapid eye movement sleep

restoration theory of sleep

adaptive theory of sleep

psychoanalytic/ psychodynamic view

activation - synthesis theory

information processing theory

Ernest Hilgard & "the Hidden Observer"

circadian rhythm

alpha waves

manifest content

latent content

insomnia

narcolepsy

sleep apnea

REM rebound

hypnosis

agonistic drugs

antagonistic drugs

opiates

psychoactive drugs

withdrawal

tolerance

depressant

stimulants

hallucinogens