Narcolepsy: characterized by uncontrollable sleep attacks
-lapses directing into REM sleep (usually during times of stress or joy)
Sleep apnea: a sleep disorder characterized by temporary cessations of breathing during sleep and consequent momentary reawakenings
Night terrors: a sleep disorder characterized by high arousal and an appearance of being terrified
-occur in stage 4, not REM and are not often remembered
Sleepwalking (somnambulism): sleep walking most often occurs during deep non-REM sleep (stage 3 or stage 4 sleep) early in the night
Dreams: a sequence of images, emotions, and thoughts passing through a sleeping person's mind
Manifest content: the remembered storyline of a dream
Latent content: the underlying meaning of a dream
Three theories of why we dream
1. Freud's wish fulfillment theory
-dreams are the key to understanding our inner conflicts
-ideas and thought that are hidden in our unconscious
2. Information processing theory
-dreams act to sort out and understand the memories that you experience that day
-REM sleep does increase after stressful events
3. Activation-synthesis theory: during the night our brainstem released random neural activity, dreams may be a way to make sense of that activity
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