AU10consciousness - 10/6/10 1 2 3 4 5 6 Consciousness What...

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10/6/10 1 Consciousness What is consciousness? Are there different levels of consciousness? The brain and consciousness? Sleeping: An altered state of consciousness? Sleeping disorders? Why do we sleep? Drugs What is consciousness? A drunk person A person on LSD A sleep walker An anesthetized person A 1-day-old baby A chimpanzee A duck What is Consciousness? Awareness of the outside world Thoughts Feelings Perceptions Other mental processes Not unique to humans Subjective experience? Sleep REM Rapid Eye Movement Beta waves (awake, alert) Physiological arousal similar to awake Muscles paralyzed EEG Waves Beta Waves High Frequency, low amplitude (13 times per second) Alert consciousness Alpha Waves Lower Frequency, higher amplitude (8 to 12 times per 1 2 3 4 5 6
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10/6/10 2 second) Resting Consciousness Stages of Sleep Stage 1 Period in which we “drift off” Waves 4 to 7 times per second (theta) Brain powers down to 50% Hypnic myoclonia Ghosts? Stage 2 Breathing deepens, heartbeat slows, blood pressure drops Sleep spindles K complexes Sage 3 Start of slow-wave sleep Waves 1 to 2 times per second (delta) Stage 4 Deepest stage of sleep Difficult to wake up REM A Night’s Sleep A Night’s Sleep Pass through the stages 4-6 times/night Each cycle 90 minutes Early: mostly slow-wave sleep Later: mostly stage 2 & REM sleep Sleep Over the Life Span Why do we sleep? Circadian rhythm:
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This note was uploaded on 12/26/2011 for the course PSYCH 100 taught by Professor H during the Fall '07 term at Ohio State.

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AU10consciousness - 10/6/10 1 2 3 4 5 6 Consciousness What...

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