EEG Study Set| 60 Questions| And Answers

EEG history correct answer: oldest non-invasive neuroimaging technique (late 1920s), first recorded by Hans Berger then Adrian and Matthews popularized it; Pauline and Hallowell Davis first ERP recordings EEG vs ERP correct answer: continuous recordings o ongoing electrical brain activity vs EEG signals time-locked to particular events (presentation of stimulus/motor response) T /F: ERPs allow us to associate brain activity with specific, experimentally controlled events correct answer: true EEG set up (how does it get from brain to computer) correct answer: brain activity recorded through electrodes on the scalp connected to an amplifier (boost size of signals) then saved digitally to computer EEG signal represents correct answer: the summed activity of many neurons (and probably many regions in the brain from any given electrode because electrical signals conduct well in the brain but the skull is a poor conductor of electricity so signals are blurred spatially - means more electrodes not necessarily better) what is picked up through an electrode is the ________ activity of many neurons acting in _______, with similar anatomical ______ and ______ correct answer: summed, synchrony, location , alignment (parallel) an important concept for understanding the the generation and propagation of EEG signals is correct answer: the electrical dipole eeg signal is DETECTABLE from the scalp occurs when a correct answer: large group of neurons with a particular anatomical location are aligned with each other large group of neurons correct answer: field what is an ECD and when does it form? correct answer: equivalent current dipole occurs when one side of the field has a positive charge (cell body) and the other end has a negative charge (axon) what types of neurons are we primarily recording from the cortex with EEG and hence lend themselves to creating ECDs?