Psychology 2220A/B Lecture Notes - Lecture 11: Lesion, Executive Functions, Hypersomnia

• School: Western University
• Department: Psychology
• Course: Psychology 2220A/B
• Professor: Scott Mac Dougall- Shackleton

Document Summary

Terms: nocturnal, diurnal, crepuscular: annual organization. Circadian sleep cycles: circadian rhythms about a day , virtually all physiological, biochemical, and behavioral processes show some circadian rhythmicity. Do endogenous clocks exist: hold animals in constant conditions. Individuals have slightly different rhythms, and become de-synchronized. Circadian clock: synchronized by environmental cues time-setters or zeitgebers. E. g. light, food availability: large shifts of clock can take several cycles to entrain. Reducing jet lag: gradually shift sleep-wake cycle prior to travel, administer post-flight treatments to promote the needed shift. Exposure to zeitgebers will lead to more rapid entrainment: bright sunlight, exercise, meals. Where is the endogenous circadian clock: many tissues exhibit endogenous rhythms, suprachiasmatic nuclei (scn) Where is the clock: many tissues exhibit endogenous rhythms, suprachiasmatic nuclei (scn) master clock in mammals, lesion scn leads to arrhythmia, transplant scn reinstates normal rhythm, transplant mutant scn (approx. Scn: is the scn the master clock in humans, patient a. h. received scn damage during surgery.