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Comparison of auditory brainstem response peak measures using ear lobe, mastoid, and custom ear canal reference electrodes

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Author(s): Samuel R. Atcherson | Timothy J. Lim | Page C. Moore | Carlos P. Minaya

Journal: Audiology Research
ISSN 2039-4330

Volume: 2;
Issue: 1;
Start page: e3;
Date: 2012;
Original page

Keywords: auditory brainstem response | ear canal | reference electrode | wave I.

ABSTRACT
Auditory brainstem response (ABR) peak measures were compared for a custom ear canal electrode and traditional mastoid and ear lobe reference electrode sites with the assumption that the ear canal electrode would yield larger Wave I amplitudes. In this study, Waves I, III, and V latencies and amplitudes were measured and compared in twenty participants between the ages of 18 and 50, with particular interest in a potential Wave I advantage using the custom ear canal reference electrode. The statistical analysis suggested that all reference electrode sites yielded comparable results with no statistical differences in peak latency or peak-to-trough amplitude for Waves I, III, and V. Although the custom ear canal electrode did not produce larger Wave I amplitudes over the other two references, a deeper placement of the ear canal electrode might have yielded different results.
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