Pachnis, I and Demosthenous, A and Donaldson, N (2007) Passive neutralization of myoelectric interference from neural recording tripoles. IEEE Trans Biomed Eng , 54 (6 Pt 1) 1067 - 1074. 10.1109/TBME.2007.891170.
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In this paper, we present a simple passive technique for removing myoelectric interference in neural recording systems using tripolar electrodes. Imbalance is simply unavoidable with the conventional quasi-tripole (QT) amplifier and this technakshnique is based on a modified version of the QT, which sees the tripole as a bridge that can be balanced by adding impedance to one of the outer electrodes. We show that parallel resistance and capacitance is better than a series combination for use at all frequencies, and that with a tripole that was intentionally made imbalanced, by an amount that we measure as 3%, the interference can be reduced about 10-fold. It is important to null the interference at low frequencies, in the electromyography (EMG) band, to get the best improvement. Common-mode interference can also be reduced by appropriate trimming if necessary.
|Title:||Passive neutralization of myoelectric interference from neural recording tripoles.|
|Keywords:||Action Potentials, Amplifiers, Electronic, Artifacts, Computer Simulation, Computer-Aided Design, Electrodes, Implanted, Electromyography, Equipment Design, Equipment Failure Analysis, Microelectrodes, Models, Neurological, Peripheral Nerves, Reproducibility of Results, Sensitivity and Specificity|
|UCL classification:||UCL > School of BEAMS > Faculty of Engineering Science > Electronic and Electrical Engineering|
UCL > School of BEAMS > Faculty of Engineering Science > Medical Physics and Bioengineering
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