PSY290H1 Chapter Notes - Chapter 14: Circadian Rhythm, Non-Rapid Eye Movement Sleep, Immunosuppression
Document Summary
Chapter 14 sleep, dreaming, and circadian rhythms. Stage 2; higher amplitude, lower frequency, two wave forms i. e. k complexes and sleep spindles. Stage 3; occasional presence of delta waves; the largest and slowest eeg waves with a frequency of 1 to 2 hz. Recuperation theories of sleep; sleep restores the disrupted homeostasis of the body. Adaptation theories of sleep; sleep is a reaction to an internal 24-hour timing mechanism as protection from accident and predation at night. Sleep of mammals and birds is characterized by high-amplitude, low-frequency waves. No correlation between sleep time, and body size/ level of activity. Based on the recuperation theories of sleep, we can make the following predictions about sleep deprivation: wakefulness produces physiological and behavioral disturbances, disturbances will worsen, post-disturbances, sleep will be regained. Sleep-deprived individuals report an increase in sleepiness, and display negative affect on various written tests of mood. Performance on tests of executive function has proven much more susceptible to sleep deprivation.
