PSYCH 4560 Chapter Notes - Chapter 6: Hemoglobin, Supercooling, Radioactive Tracer
6 Mar 2018
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Brain activity: move in interest toward brain research, brain activity = multidisciplinary; popular as fact and in fiction, objective marker of brain activity, thoughts (info processing, feelings, stress/arousal, complex relationship, cognition/emotion/behavior. Delta wave: 0. 5-4 hz, sleep rhythm, asleep (nrem sleep, sleep stages, infants, commonly thought to store info as you sleep. Theta wave: 4-8 hz, relatively unknown, lower alert theta = sleep onset, rem (strong dream, higher alert theta = overlearned task activity, perceptual cognition. Alpha wave large amplitude: 8-12 hz, present in 75% of population while awake relaxed (eyes closed, lack of cognitive processing) Beta wave low amplitude: 18-30 hz, alert cognitive processing, alpha blocking (we can"t relax) Gamma waves: 30-70 hz, alert highest level cognitive processing, super beta low amplitude relatively unknown. Recordings: signal diff comparison, monopolar, eeg electrode, non-eeg reference (ear or scalp average reference, difference from nothing, bipolar, multiple eeg electrodes, difference between regions, left side v right side.
