PSYC 2650 Study Guide - Midterm Guide: Pulse Oximetry, Reference Electrode, Mental Chronometry
10 Feb 2019
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Document Summary
Mri less about timings, more about space. Takes a picture of the brain, to look at brain structure does not measure brain action. Non-invasive imaging technique that can measure metabolic activity related to neural functioning. Measures changed in cerebral blood oxygenation active neural tissue requires oxygen. Changes in bold (blood-oxygen level dependent) signal mark active brain regions. Revolutionized the study of human cognition and its biological underpinnings. Excellent spatial resolution as it can image brain with min precision picture of the brain"s moment by moment activities summarizes brain activity over a period of several second but can"t tell when the activity took place. Eeg measures small electrical potentials from scalp. Scalp electrodes measure voltage changes relative reference electrode. They don"t tell you where the reaction is coming from (activity/ information) Bad spatial resolution, millions of neurons create an electrical field. Can tell us about timing but weak in telling where the activity took place.
