An Analysis of Different Biopotential Electrodes Used for Electromyography

Authors R. Raja Sudharsan1, J. Deny1, E. Muthu Kumaran2, A. Sharon Geege3

1 Kalasalingam Academy of Research and Education, Krishnankoil 626126, India

2 Dr BR Ambedkar Institute of Technology, Pahargaon, Port Blair-744103, Andaman and Nicobar Islands, India

3 National Engineering College, Kovilpatti 628503, India.

Issue Volume 12, Year 2020, Number 1
Dates Received 06 January 2020; revised manuscript received 15 February 2020; published online 25 February 2020
Citation R. Raja Sudharsan, J. Deny, et al., J. Nano- Electron. Phys. 12 No 1, 01020 (2020)
PACS Number(s) 82.45.Fk
Keywords Electrodes, Electromyography, Noninvasive, Signal to noise ratio, Silver (13) .

Measuring electromyographic signals from human body using electrodes is becoming a challenging task nowadays due to its materials used, noise, temperature coefficient, pain and other external disturbances while measuring the electromyograph for the human body. This paper deals with the analysis of different bio-potential electrodes for measuring electromyography (EMG). This is carried out by analysis of various materials used for manufacturing the electrodes, the noise which is generated, resistivity of the material and also invasive (generates pain while measuring) and non-invasive (does not generate any pain while measuring) electrodes. There are different types of electrodes used for electromyographic measurement, among which needle electrode is used more in clinical measurements. But this electrode produces much signal to noise ratio (SNR) of about 120 dB and produces some pain due to needle electrodes which will be inserted into the skin of human body (invasive) during measurements. So, the surface electrode is placed over the epidermis (outer layer of the skin) of human body, has been analyzed for measuring the electromyographic signals from the particular position of defect (gait analysis, neuropathic and myopathic disorders) in human body, which produces SNR of about 75 dB and temperature coefficient of 0.0038 K – 1. These electrodes are made of silver (Ag)/silver chloride (AgCl) which is non-invasive electrode. So, this type of surface electrodes (also disposable surface electrodes) will be simpler and much easier to measure with low cost and also gives more accurate results of EMG measurements from human body without pain during measurements.

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