PSY 250 Study Guide - Midterm Guide: Melatonin, Lesion, Atony
10 Aug 2018
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Why dreams: methods for monitoring brain and physiological activity. Surface recording electrode are used to measure electrical signals, eeg waves. Eeg wave patterns are characterized in terms of frequency and amplitude: analogy of changs in eeg, awake: chatting. Sleep: chanting: awake > sleep = level of synchrony. Place electrode on scalp to measure electrical activity from the brain. Inject gel for conductance when gel is it used it can be more accurate. Place electrodes above and under eyes to measure signal difference when the eyes move. Muscles moving the eyes created that signal difference to find eye movement. Electromyography (emg: measuring muscle activity, stages of sleep: Eeg during awoke states: awake by non-attentive (ex. Eyes closed: alpha waves (8-12 hz, medium frequency and amplitude, related to cognitive factors so may have more meaning, fully awake, attentive, beta waves (12-30 hz) Faster amplitude, higher frequency: gamma wave is greater than 30 hz, b. eeg during 4 stages of sleep.
