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. 2016 Mar 31;10:114. doi: 10.3389/fnins.2016.00114

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Copyright © 2016 Hahne, Farina, Jiang and Liebetanz.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The electrical impedance for the 3 electrode types. (A) Impedance spectra. The proposed implant has the smallest impedance, followed by the wet AgCl electrodes and the dry electrodes. (B) Impedance change following donning (at f = 100 Hz). The impedance of the dry electrodes decreased continuously within the 120 min of measurements. This effect was less pronounced for the Ag/AgCl electrodes. (C) Impedance variations across days, measured approximately 120 min after placing the dry and Ag/AgCl electrodes.