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Ch. 4-1 States of Consciousness Consciousness Consciousness Our awareness of processes like sleeping, dreaming, concentrating, and making decisions Waking consciousness Mental state that encompasses the thoughts, feelings, and perceptions when we are awake and alert Altered states of consciousness Mental states that differ noticeably from normal waking consciousness Conscious Experience If we interpret all senses at once, we would go crazy Not everything happens in normal consciousness Recognizing a word Hearing a friend’s voice in the background Daydreaming and Fantasy Daydreaming and Fantasy Apparently effortless shifts in attention away from the here and now into a private world of make-believe Usually when we want to be somewhere else Fall into 4 categories Positive, negative, scattered, and purposeful Sleep To recharge batteries Can be like drug use without Sleep can help us create better solutions Circadian Cycles:The Biological Clock Circadian rhythm Regular biological rhythm with a period of approximately 24 hours We know when to sleep and wake in routine Can feel during daylight savings time Epinephrine Max in morning - body alert Melatonin Surges at night - promotes sleep Sleep Stages 1. Last a few moments 2 and 3. Hard to awaken Does not respond to light and sound Heart rate, temperature, and blood pressure drop off 4. 15-20 minute segments Heart rate, temp, and blood pressure is as low as it will get REM Rapid-eye movement Stages Continued REM Almost paralyzed Dreaming may occur here Normal night: 90 minutes from Stage 1 - REM 4-5 sleep cycles 45-50% Stage 2 20-25% REM Stage 3 and 4 disappear during the night