PSYC 370 Chapter Notes - Chapter 14: Biphasic And Polyphasic Sleep, Raphe Nuclei, Hypnotic
9 Mar 2021
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It is difficult to stay continuously in nrem sleep, so the brain periodically switches to one of two other states. If there are any immediate bodily needs to be taken care of (need for food or water), the brain switches to wakefulness. 24 hours; hence, the more wakefulness there is during a cycle, the less time there is for sleep. Jet lag and shift work: people in modern industrialized societies are faced with two different disruptions of circadian rhythm: jet lag and shift work. Jet lag occurs when the zeitgebers that control the phases of various circadian rhythms are accelerated during east-bound flights (phase advances) or decelerated during west-bound flights (phase delays) Indicated that visual axons critical for the entrainment of circadian rhythms branch off from the optic nerve in the vicinity of the optic chiasm. Four areas of the brain involved in sleep.
