Paper Information

Journal:   IRANIAN JOURNAL OF ELECTRICAL AND COMPUTER ENGINEERING (IJECE)   SUMMER-FALL 2010 , Volume 9 , Number 2; Page(s) 139 To 143.
 
Paper:  MOTION ARTIFACT FROM ELECTRODES AND CABLES
 
Author(s):  SIMAKOV A.B., WEBSTER J.G.
 
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Abstract: 

We review the many causes of motion artifacts in biopotential recording. We moved several electrode materials at several velocities in electrolytes. Artifact voltage ranged from 350 μV at 0.13% NaC1 concentration and 100 mm/s to 10 mV at 1.3% concentration and 25 mm/s. We present a theoretical model in which adsorbed ions attach to the electrode. Ions in the diffusion layer move with the electrolyte. This separation of charge causes the artifact. A second source of motion artifact is cable movement. This causes the polarization potential of the electrodes to have a varying attenuation because the stray capacity of the electrode varies. Experimental and theoretical artifacts ranged from 1 to 100 mV. Artifact is reduced by using electrodes having large area, electrolytes having high concentration, amplifiers having high impedance, and preamplifiers located at the electrodes.

 
Keyword(s): ELECTRODE MOTION ARTIFACT, BIOPOTENTIAL RECORDING, ELECTROLYTES, POLARIZATION POTENTIAL, CABLE MOVEMENT ARTIFACT
 
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