PSYC 211 Lecture Notes - Lecture 12: Raphe Nuclei, Per2, Locus Coeruleus

• School: McGill University
• Department: Psychology
• Course: PSYC 211
• Professor: Jonathan Britt

Document Summary

Limited knowledge on sleep - no firm grasp on why we need sleep and what it"s function is. Sleep research in humans is conducted in a sleep laboratory: electrodes placed around the eyes monitor eye movements, recorded as an electro-oculogram (eog) - most common. In wake stages, there are larger fluctuations of activity because the eye is constantly jerking around the room to get a sense of the environment. In the initial, light-stages of sleep there is often very little eye movements. In deeper stages of sleep, stages 3-4, there are some slow and irregular movements of the eye: when people enter rem sleep, there are periods where the eye moves back and forth very quickly. Divisions of sleep stages: there is the awake state and the sleep state, non-rem sleep is divided into light sleep (stages 1 and 2), and deep, slow-wave sleep (stages 3-4;