Module Outline

Module 8: Sleep, Dreams, and Body Rhythms

Module 8 begins by defining consciousness and the various types of body rhythms humans go through.

Next, the module reports on sleep deficit studies and theories on why we sleep. The various stages of sleep are discussed, along with theories on dreams.

The module concludes with a brief discussion of the major sleep disorders, including insomnia, sleep apnea, and narcolepsy. A few minor disorders are also mentioned.

Consciousness
	Consciousness
Body Rhythms
	Pseudoscientific claim
	Biological rhythms
	Circadian rhythms
	Ultradian rhythms
	Infradian rhythms
Sleep and Sleep Deficit
	William Dement
Why We Sleep
	Hypothalamus
	Melatonin
	Protective theory
	Restorative theory
	Creativity theory
Sleep Stages, REM, and Dreaming
	Electroencephalograph (EEG)
	Non-REM sleep
	NREM 1 sleep
	NREM 2 sleep
	NREM 3 sleep
	Slow-wave sleep
	REM sleep
	Paradoxical sleep
	Why we dream
	Freudian wish-fulfillment theory
	Information processing theory
	Physiological functioning theory
	Activation-synthesis theory
	Cognitive development theory
Sleep Disorders and Sleep Problems
	Insomnia
	Sleep apnea
	Narcolepsy
	Somnambulism (sleepwalking)
	Night terrors
	Bruxism
	Enuresis
	Myoclonus