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