Latency and Amplitude Effects of Electrode Placement on the Early Auditory Evoked Response This study examined the effects of electrode placement on the early auditory evoked response in normally hearing subjects. The electrodes are termed noninverting, inverting, and common. Ten commonly used electrode combinations were evaluated. Both amplitudes and latencies of Waves I, III, and V were measured for each electrode combination. No ... Research Article
Research Article  |   February 01, 1986
Latency and Amplitude Effects of Electrode Placement on the Early Auditory Evoked Response
 
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Article Information
Research Article   |   February 01, 1986
Latency and Amplitude Effects of Electrode Placement on the Early Auditory Evoked Response
Journal of Speech and Hearing Disorders, February 1986, Vol. 51, 63-70. doi:10.1044/jshd.5101.63
History: Received May 31, 1985 , Accepted October 10, 1985
 
Journal of Speech and Hearing Disorders, February 1986, Vol. 51, 63-70. doi:10.1044/jshd.5101.63
History: Received May 31, 1985; Accepted October 10, 1985

This study examined the effects of electrode placement on the early auditory evoked response in normally hearing subjects. The electrodes are termed noninverting, inverting, and common. Ten commonly used electrode combinations were evaluated. Both amplitudes and latencies of Waves I, III, and V were measured for each electrode combination. No mean differences in latencies were observed for Waves I, III, or V with any of the 10 electrode combinations. Similarly, no statistically significant Wave I or Wave III amplitude differences were found among the 10 electrode montages. However, larger Wave V amplitudes were found with placement of the noninverting electrode at the vertex (0.53 µv) as compared to the upper forehead (0.39 µv). Moreover, Wave V amplitudes were larger for inverting/common electrode placements at the seventh cervical vertebra/forehead, neck/forehead, and neck/neck (0.50 µv) than for mastoid/mastoid and mastoid/forehead placements (0.40 µv). Thus, three combinations of electrodes gave the largest Wave V amplitudes. These placements for the noninverting, inverting, and common electrodes, respectively, were (a) vertex-seventh-forehead, (b) vertex-neck-forehead, and (c) vertex-neck-neck.

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