Ch5cont

Ch5cont - Ch. 5: Consciousness Consciousness Our subjective...

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Unformatted text preview: Ch. 5: Consciousness Consciousness Our subjective experience of the world, our sensations, and cognitions. States of consciousness Sleeping Daydreaming Hypnosis Meditation Drug induced states The Wake-Sleep Cycle Purpose of Sleep? Restorative theories Learning/brain organization theories QuickTime and 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. What triggers wake-sleep transitions? Circadian Rhythm ~24-hour cycle Light exposure-->suppresses melatonin No light exposure-->melatonin release Melatonin is inhibitory Reticular Activating System (RAS) Stimulates cortex when awake Inhibits cortex when asleep* *except for during dreaming The Stages of Sleep EEG-recordings across the stages of sleep Stage 1 Hypnogogic Stage 2 Sleep spindles Stages 3 and 4 Delta (or slow) waves REM (rapid eye movement) sleep Characteristics of REM and NREM...
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Ch5cont - Ch. 5: Consciousness Consciousness Our subjective...

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