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Unformatted text preview: Ch 6&7 study guide Consciousness- our awareness of ourselves and our environment Circadian rhythm- the biological clock; regular bodily rhythms that occur on the 24 hour cycle. Our thinking is sharpest and memory most accurate when we are at our daily peak. Lights reset and regulate our c.r. selective attention- the focusing of conscious awareness on a particular stimulus. Our 5 senses take in 11 billion bits of information per second of which we consciously process about 40 night terrors- a sleep disorder characterized by night arousal and an appearance of being terrified and unlike nightmares night terrors occur during stage 4 sleep within 2 or 3 hours of falling asleep and are seldom remembered hallucinations- false sensory expressions, absence of an external visual stimulus. Like the sensation of falling or floating in stage 1 of sleep stages of sleep with brain wave activity: Stage 1: slowed breathing, irregular brainwaves, sensory expressions, hypnogogic sensations(twitches) Stage 2: relax more deeply and begin about 20 minutes of stage 2 sleep appearance of sleep spindles (burst of rapid, rhythmic brainwave activity. You are now deeply asleep) Stage 3:a transitional stage, first appearance of large slow delta waves Stage 4: deep sleep, both 3 and 4 show large delta waves, called slow wave sleep. Together 3 and 4 are 30 minutes. this is the hardest stage to wake someone up; stage 4 is when children often wet the bed or sleep walk REM- rapid eye movement happens about 1 hour after you first fall asleep. Your first time in REM is for about 10 minutes. Brain waves are rapid, breathing is rapid and irregular, and every 30 seconds your eyes dart around under your eyes. This is the stage you dream in. paradoxical sleep, your body is paralyzed but other body systems are active. Explain the human sleep cycle: What influences sleep patterns? Age, newborns sleep 2/3 their day while adults barely sleep 1/3. Also culture. In industrialized nations, people sleep less now than they did a century ago. Thanks to light bulbs, shift work, and social diversions, those who would have gone o bed @ 9 are now up till 11 or later....
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- Spring '08