PSYC 106 Lecture Notes - Lecture 14: Neuromodulation, Cataplexy, Sleep Deprivation
Document Summary
Energy conservation theory- must conserve energy due to excess use during day. Restorative theories- built up free-radicals/waste that needs to be removed. Affects emotional responses- increased stress, mood fluctuations, irritability, decreased motor performance. Affects cognitive responses- difficulty concentrating, memory problems, decision making, productivity. Affects somatic responses sensations of pain and chills, lower immune system activity, increased risk for cancer, cardiovascular disease, and diabetes. 2 mechanisms that control sleep: sleep homeostasis and circadian clock. Circadian rhythms- determines when we go to sleep. The homeostatic mechanism regulates sleep intensity, while the circadian clock regulates the timing of sleep. Environmental cues (like light) tell circadian rhythms when to wake up, and signals are sent from the hypothalamus and basal forebrain to arousal systems in the brainstem which increase cortex, subcortex, and thalamus activity. Progression characterized as a decrease in level of consciousness. 90 minute cycle- takes 90 minutes to progress through all stages.
