PSYB64H3 Chapter Notes - Chapter 11: Cataplexy, Raphe Nuclei, Sleepwalking
16 Feb 2017
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Psyb64- chapter 11: sleep and waking (lecture and textbook) Circadian rhythms is a repeating cycle of about 24 hours for sleep and wakefulness. Zeitgebers- is an external cue(or a stimulus) for setting biological rhythms. Light is the most important zeitgebers for human beings. Free running circadian rhythm- a rhythm that is not synchronized with external cues. Without zeitgebers, frcr, lasts for approximately 24. 2 24. 9 hours. earth"s rotation due to the exposure of sunlight. Individuals sleeping patterns are different because of the different versions genes for our internal clocks. People who are productive in the morning are referred to as larks. People who are more productive in the night are referred to as night owls. Almost everyone is known to be a night owl when they are adolescent. Entrainment is the resetting of the human biological clock to 24 hour cycle of the. This is because the drop in melatonin(neurochemical involved in sleeping regulation pattern) at the onset of puberty.
