PSYC1002 Final: sleep and appetite

• School: University of Sydney
• Department: Psychology
• Course: PSYC1002
• Professor: Psychology professor

Document Summary

Hormones that keep use awake (in brain stem) If forebrain disconnected from brainstem = continuous sleep. Neurons are active while awake & quiet during sleep. Electrical stimulation of neurons can wake sleep animals. Pre-optic area (anterior hypothalamus) has neurons that contains gaba. Neurons inhibit ach, 5ht, na arousal systems in brain stems. Awake - electrical activity is high frequency & "noisy" Asleep - slow rhythmic patterns of electrical activity in brain ("slow-wave sleep") If woken up during rem = think we dreamt. But proven dreaming is not exclusive in rem. Difficult to wake people up during this stage of sleep. Typically occurs near morning time (after first fell asleep = stage 4) Rem sleep caused by neurons in pons that contain acetylcholine and stimulate neurons in the thalamus, which project to the visual cortex. Our brain tries to put meaning to the info.