PSYA01H3 Chapter 5: Chapter 5 Psychology
Document Summary
Module 5. 1 biological rhythms of consciousness: wakefulness and sleep. This is an example of an infradian rhythm any rhythm that happens for more than a day. Most well known ex. of this is the menstrual cycle. B/c this happens yearly, it"s a circannual rhythm yearly cycle . Organisms have evolved biological rhythms that are adapted to the cycles in their env. But most biological rhythms occur w/ more frequency than once a month. Some hormonal activity happens in 90-120 minute cycles. These more frequent biol"ical rhythms are referred to as ultradian rhythms. Most impact in a day is by the circadian rhythms: are internally driven daily cycles of ~ 24 hours affecting physiol"ical + behav"al processes. They inv being awake at specific times, being hungrier during certain times, and even being able to concentrate more at certain times. A key brain part in this is the superchiasmatic nucleus (scn) of the hypothalamus.
