PSYB64H3 Lecture Notes - Lecture 8: Circadian Rhythm, Suprachiasmatic Nucleus, Jet Lag
Document Summary
Psyb64 lecture 8 sleep and waking : circadian rhythms, stages of wakefulness & sleep, sleep over the lifespan, dreaming, functions of sleep, brain mechanisms of wakefulness & sleep, biochemistry of wakefulness & sleep, sleep disorders, circadian rhythms. Any external cue that synchronizes an organism"s internal clock. Shift work, jet lag, and daylight saving time. Easier to adjust to a phase-delay than a phase-advance. Daylight saving time in spring requires a phase advance, and can produce symptoms similar to jet lag. The time change in fall is equivalent to a phase delay, and causes little disruption for most people. Scn close to optic nerves providing information on light and to pituitary and pineal glands to influence behaviour through release of hormones. Scn perceives the difference between day and night but does not dictate whether an animal is nocturnal or diurnal in its behavior.
