PSYB51H3 Chapter Notes - Chapter 1: Hemoglobin, Positron Emission Tomography, Stellar Magnetic Field
Document Summary
Electroencephalography (eeg): a technique that, using many electrodes on the scalp, measures electrical activity from populations of many neurons in the brain. Can be sued to roughly localize whole populations of neurons and measure their activities with excellent temporal accuracy. Event-related potential (erp): a measure of electrical activity from a subpopulation of neurons in response to particular stimuli that requires averaging many eeg recordings. Magnetoencephalography (meg): a technique, similar to eeg, that measures changes in magnetic activity across populations of many neurons in the brain. Provides a better idea of where in the brain neurons are most active. functional magnetic resonance imaging (fmri): a variant of magnetic resonance imaging that makes it possible to measure localized patterns of activity in the brain. Activated neurons provoke increased blood flow, which can be quantified by measuring changes in the response of oxygenated and deoxygenated blood to strong magnetic fields.
