Lecture 10-Consciousness

Lecture 10-Consciousness - OUTLINE Modules 14, 15, 16...

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OUTLINE – Modules 14, 15, 16 CONSCIOUSNESS 1. Circadian Rhythms 2. Sleep Stages of Sleep Sleep Debt Why we sleep? Sleep disorders 1. Dreams o Why do we dream? 2. Hypnosis (read Module 15) 3. Drugs o Depressants o Narcotics o Stimulants o Hallucinogens
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DEFINING CONSCIOUSNESS Def: our awareness of ourselves, our behavior, and our environment at any given moment Consciousness is not a unitary construct: Awake Daydreaming Asleep Subliminal Awake different levels of awareness o EX: learning to drive vs. driving now Today: Altered states of consciousness: Sleep Dreaming Drugs SLEEP – CIRCADIAN RHYTHMS Circadian rhythm 1. Fluctuations in alertness, energy and mood over the course of the day. Biological clock o About a 24 hr period (really 25 hrs) 2. These shifts are related to underlying bodily processes Daily cycles occur in o Hormone production o Body temperature o Blood pressure 3. Changes as we get older 4. We seem to function better (both cognitively/ physically) in our peak time : MEQ: (Morningness Eveningness Questionnaire) 5. Our circadian cycles run a little bit long. We see evidence of this in Jet lag Monday morning blues
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WHAT HAPPENS WHEN WE SLEEP? Wakefulness 5 Stages of sleep : (90-100 minute cycles) different patterns of brain activity Stage 1 Sleep - approximately 5 minutes less braing activity hallucinations jerking easy to awaken reasonably conherent Stage 2 sleep - about 20 minutes sleep spindles still somewhat easy to wake up Stage 3 & 4 - about 30 minutes delta waves-longer slower peaks very hard to wake you up but…whispering you name will wake you up STAGE 5 – Rapid Eye Movement (REM) REM sleep - 30-45 minutes
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Lecture 10-Consciousness - OUTLINE Modules 14, 15, 16...

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