NDLI: The effect of force and electrode material on electrode-to-skin impedance

Content Provider	IEEE Xplore Digital Library
Author	Mihajlovic, V. Grundlehner, B.
Copyright Year	2012
Description	Author affiliation: Philips Res., Eindhoven, Netherlands (Mihajlovic, V.) \|\| Holst Centre / imec, Eindhoven, Netherlands (Grundlehner, B.)
Abstract	This paper studies the influence of electrode coating material and contact force on the electrical contact impedance between such electrodes and skin. The electrical interface that exists between the electrode and the skin was modeled, and the modeling parameters as a function of force and material were derived. Increasing force from 80g to 350g decreased the overall resistance from 342k to 75k for AgCl and from 9.6MΩ to 0.9MΩ for gold electrodes, while capacitance increased from 2.3μF to 18μF and from 1.1μF to 5.1μF, respectively. By increasing force the variance of estimated resistance and capacitance values is reduced. This demonstrated that the AgCl electrodes are the preferred candidate for EEG recordings due to better properties in the lower end of the frequency range of interest (0.1 - 100Hz), and that with the higher contact force they can lead to stable and reproducible EEG measurements.
Sponsorship	Circuits & Syst. Soc.
Starting Page	57
Ending Page	60
File Size	1664432
Page Count	4
File Format	PDF
ISBN	9781467322911
e-ISBN	9781467322935
e-ISBN	9781467322928
DOI	10.1109/BioCAS.2012.6418511
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-11-28
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrodes Gold Force Capacitance Skin Impedance Integrated circuit modeling
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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