Subconscious
Circadian Rhythm
REM
Rapid-Eye-Movement sleep
NREM
Non-Rapid-Eye-Movement sleep
Alpha waves
Sleep spindles
Theories of sleep:
Insomnia
Narcolepsy
Sleep apnea
Night terrors
REM rebound
Hypnosis
Ernest Hilgard & "the Hidden Observer"
Psychoactive drugs
Agonistic drugs
Antagonistic drugs
Withdrawal
Tolerance
Depressants
Stimulants
Opiates
Hallucinogens