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Open AccessArticle

Effects of Cable Sway, Electrode Surface Area, and Electrode Mass on Electroencephalography Signal Quality during Motion

1
J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA
2
Max Planck Institute for Biological Cybernetics, 72076 Tübingen, Germany
3
International Max Planck Research School for Cognitive and Systems Neuroscience, 72074 Tübingen, Germany
4
U. S. Army Research Laboratory, Aberdeen Proving Ground, Aberdeen, MD 21005, USA
*
Author to whom correspondence should be addressed.
Sensors 2018, 18(4), 1073; https://doi.org/10.3390/s18041073
Received: 1 February 2018 / Revised: 26 March 2018 / Accepted: 27 March 2018 / Published: 3 April 2018
(This article belongs to the Special Issue Novel Sensors for Bioimaging)
More neuroscience researchers are using scalp electroencephalography (EEG) to measure electrocortical dynamics during human locomotion and other types of movement. Motion artifacts corrupt the EEG and mask underlying neural signals of interest. The cause of motion artifacts in EEG is often attributed to electrode motion relative to the skin, but few studies have examined EEG signals under head motion. In the current study, we tested how motion artifacts are affected by the overall mass and surface area of commercially available electrodes, as well as how cable sway contributes to motion artifacts. To provide a ground-truth signal, we used a gelatin head phantom with embedded antennas broadcasting electrical signals, and recorded EEG with a commercially available electrode system. A robotic platform moved the phantom head through sinusoidal displacements at different frequencies (0–2 Hz). Results showed that a larger electrode surface area can have a small but significant effect on improving EEG signal quality during motion and that cable sway is a major contributor to motion artifacts. These results have implications in the development of future hardware for mobile brain imaging with EEG. View Full-Text
Keywords: EEG; motion artifacts; electrode mass; electrode surface area; cable sway; signal to noise ratio; phantom head; locomotion EEG; motion artifacts; electrode mass; electrode surface area; cable sway; signal to noise ratio; phantom head; locomotion
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MDPI and ACS Style

Symeonidou, E.-R.; Nordin, A.D.; Hairston, W.D.; Ferris, D.P. Effects of Cable Sway, Electrode Surface Area, and Electrode Mass on Electroencephalography Signal Quality during Motion. Sensors 2018, 18, 1073.

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