PSYCH 100 Lecture Notes - Lecture 13: Slow-Wave Sleep, Rapid Eye Movement Sleep, Non-Rapid Eye Movement Sleep
Document Summary
Everything of which we are aware of at any given time: thoughts, feelings, sensations, external stimuli. Altered states of consciousness: sleep, meditation, hypnosis, drugs. Circadian rhythm: regular fluctuation from high to low points of certain bodily functions and behaviors. Affects functions of: blood pressure, heart rate, appetite, secretion of hormones and digestive enzymes, sensory acuity, elimination, body"s response to medication. Understanding of sleep increased by the study of: brain waves, eye movements, chin muscle tension, heart rate, respiration rate. Two types of sleep: rem and non-rem (nrem) Stage 1: lightest sleep, theta waves occur. Stage 2: somewhat more deeply asleep (mid-sleep, sleep spindles occur, k complex occurs. Stage 3: deep sleep, delta waves 20% = slow wave/deep sleep begins, heart and breathing are slow and regular. Stage 4: deepest sleep, delta waves reach nearly 100, blood pressure and brain activity at lowest points in 24 hour period. Called active sleep , dream sleep , or paradoxical sleep .
