PSYCH101 Lecture Notes - Hypnagogia, Night Terror, Sleep Disorder

• School: University of Waterloo
• Department: Psychology
• Course: PSYCH101
• Professor: Richard Ennis

Document Summary

Sleep: periodic, natural, reversible loss of consciousness- as distinct from unconsciousness resulting from a coma, general anesthesia, or hibernation. Physiological: heart rate slows down, breathing becomes more irregular, muscles relax, and sensory systems close down (starting with vision, then hearing, etc. ) Neurological: electric voltage increases with more diffuse firings throughout the brain. Psychological: awareness of time slips away, control of thought and imagery decreases, hypnagogic hallucinations may occur (strange occurrences that are experience just before nodding off) Circadian rhythm: the biological clock; regular bodily rhythms that occur on a 24-hour cycle. Rem sleep: otherwise known as, rapid eye movement sleep, a recurring sleep stage during which vivid dreams commonly occur. Also known as paradoxical sleep, because the muscles are relaxed, but other body systems are active. Alpha waves: the relatively slow brain waves of a relaxed, awake state. Delta waves: the large, slow brain waves associated with deep sleep.