ch 5 notes II - Ch 5 Consciousness Focus on Awareness...

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Ch. 5: Consciousness: Focus on Awareness
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Consciousness Our awareness of our own existence, sensations, and cognitions Normal consciousness Altered states of consciousness Sleeping Dreaming Hypnosis Meditation Drug induced
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Why do we sleep? Evolutionary theory Restorative theory Facilitating learning
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QuickTimefand a TIFF (Uncompressed) decompressor are needed to see this picture. Sleep needs are enormous during early development, and decrease over lifespan-- suggesting a role in neural organization and learning.
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Stages of Sleep
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Stages of Sleep EEG-based measurements: Stage 1 Hypnogogic Stage 2 Sleep spindles Stages 3 and 4 Delta waves REM (rapid eye movement) sleep
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Characteristics of REM and NREM sleep REM Rapid (awake) EEG waves Muscle paralysis Rapid Eye Movements Responding to stimuli: Easier to wake ~50% of participants incorporate external stimuli into dream Dreams common rehearse within ~8 minutes of waking
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