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Unformatted text preview: Consciousness: Modules 8 and 9 States of Consciousness o Consciousness is our awareness of ourselves and the environment. Awareness requires our attention. o Alternative states of consciousness happen naturally (sleep) or be artificially induced (hypnosis & drugs). Sleep & Dreaming o Even though we spend about 1/3 of our lives doing it, there is no complete agreement on why we sleep and dream. Biological Rhythms o Circadian rhythms are on a (roughly) 24-hour cycle and include sleep/wakefulness. Referred to as the biological clock can be altered with artificial light. Sleep Stages o We cycle through 5 stages every 90 minutes or so o Alpha waves are the slowed activity our brains show when we are relaxed with eyes closed, but still awake (9-14 cps). Stages 1 & 2 o Light sleep high amplitude, slow, regular wave form called theta waves(5-8 cps) o Daydreaming individuals show theta wave activity Stages 3 & 4 o Deep sleep low amplitude, slow wave form called delta waves (1.5-4 cps)Deep sleep low amplitude, slow wave form called delta waves (1....
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- Fall '10