EEG and Electrophysiology 1-2-3 Questions And Answers

derivation correct answer: refers to both the process of recording from a pair of electrodes in an EEG channel and the resulting EEG record. common reference montage correct answer: montage achieves good analysis of asymmetry provided that there is symmetrical placement of the reference electrode(s). burst correct answer: refers to the abrupt appearance and disappearance of a group of waves that can be discriminated from background activity. average reference montage correct answer: montage detects the voltage difference between a single electrode placed in input 1 and the average of the remaining 10-20 electrodes placed in input 2. active electrode correct answer: is placed over the scalp or brain to detect EEG activity. bipolar montage correct answer: montage detects voltage differences between single, adjacent electrodes. The montage consists of multiple bipolar derivations where no single electrode is common to all derivations. Mostly linked Asymmetry correct answer: refers to the unequal amplitude and/or form and frequency of EEG activity over corresponding areas on opposites sides of the head. montage correct answer: the particular arrangement by which a number of pairs of electrodes in EEG channels (derivations) are simultaneously displayed in an EEG record. mu rhythm correct answer: ranges from 7-11 Hz and is detected over the central or centro-parietal regions of the scalp when a patient is awake. This rhythm is composed of arch-shaped waves that can be blocked or weakened by contralateral movement or the intention to move. referential montage correct answer: montage consists of referential derivations (pairs of electrodes including an active electrode placed in input terminal 1 and reference electrode