PS101 Lecture Notes - Lecture 6: Delta Wave, Alpha Wave, Homeostasis
Document Summary
What is consciousness: moment to moment awareness of ourselves and environment. What are the properties of consciousness: subjective & private no one knows your thoughts, others cannot directly know our reality (and vice versa, dynamic, ever-changing, self-reflective, mind is aware of its own consciousness. History of the question: what is consciousness: seemed ideally suited for psychology, difficult topic, no agreement. Does the absence of conscious thought = the unconscious: te(cid:396)(cid:373) (cid:862)u(cid:374)(cid:272)o(cid:374)s(cid:272)ious(cid:863, freud (cid:858)no(cid:374)(cid:272)o(cid:374)s(cid:272)ious(cid:859) Circadian rhythms: neurons in scn are active during daytime. Inhibits melatonin secretion: raises body temperature and alertness, neurons in scn become inactive at night, allows melatonin secretion to increase, melatonin promotes relaxation and sleepiness, free running circadian rhythms (cid:858)natu(cid:396)al(cid:859) (cid:449)ake-sleep cycle longer than 24 hours. Circadian rhythms: disruptions of circadian rhythms, jet lag, night-shift work, seasonal affective disorder. Sleep & dreaming: circadian rhythms promote readiness for sleep, spend about 1/3 of time asleep, studied in sleep labs.
