PSY3320 Lecture Notes - Lecture 6: Atony, Photopic Vision, Sleep Diary

• School: Monash University
• Department: Health Sciences - Psychology
• Course: PSY3320
• Professor: Multiple Professors

Document Summary

Some areas of brain more active in sleep than in wake (e. g. during rem, visual cortex is very active) Sleep is largely controlled by the hypothalamus. Important in maintaining neural processes and memory consolidation. Ideal for measuring sleep is psg (polysomnography) in lab. Other ways include actigraphy, sleep trackers, sleep phone apps. Recorded physiological signals while a person is asleep. Eeg, emg, eog are the main components. Eeg > measures electrical brain activity using electrodes attached to the sleep. Eog > electrical activity associated with eye movements, electrodes placed either side of the eyes. Emg > measures electrical muscle activity usually of the face, during sleep it"s common to measure tonic activity at chin/jaw. They measure: the sum of electrical potential energy (voltage) between two electrodes e. g. c4-a1. Eeg trace shows voltage on the y axis and time on the x axis. Amplitude = peak to peak changes in voltage, frequency = number of waves per second.