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Keywords = reusable cup electrodes

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15 pages, 2713 KiB  
Communication
The Influence of Electrode Impedance on the Parameters of Visual Evoked Potentials
by Joanna Górecka
Appl. Sci. 2025, 15(1), 369; https://doi.org/10.3390/app15010369 - 2 Jan 2025
Viewed by 948
Abstract
The choice of a proper electrode is determined mainly by the type of examination. For recording spontaneous activity of the brain (EEG), two types of reusable electrodes should be considered, i.e., cup (Au, Ag, Ag/AgCl) and sintered bridge electrodes (SBEs) with a gold [...] Read more.
The choice of a proper electrode is determined mainly by the type of examination. For recording spontaneous activity of the brain (EEG), two types of reusable electrodes should be considered, i.e., cup (Au, Ag, Ag/AgCl) and sintered bridge electrodes (SBEs) with a gold or silver pin. In the case of evoked potentials (EPs), only cup electrodes are used. To test the effect of electrode choice on the parameters of evoked potentials, twenty reusable electrodes of each type, i.e., Au, Ag, Ag/AgCl, were used to record visual evoked potentials (VEPs). The electrodes were then further tested by the electrochemical impedance spectroscopy (EIS) method. The presented research confirms the existence of an effect of the number of examinations performed with the same set of reusable cup electrodes on the values of the VEP parameters. A prolongation of the latencies and variability in the amplitudes for all the individual VEP components were observed. The obtained results suggest possible advantages of using reusable cup electrodes only once. An alternative to these electrodes may be solutions based on materials composed of polymers or dry electrodes. Full article
(This article belongs to the Section Applied Biosciences and Bioengineering)
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