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June 1977

Scalp Distribution of Early (0 to 10 msec) Auditory Evoked Responses

Author Affiliations

From the Department of Audiology (Mr Martin), Tennessee State University, Nashville, Tenn, and the Department of Audiology and Speech Pathology (Dr Moore), Memphis State University, Memphis. Dr Moore is now with the National Institutes of Health, National Institute of Neurology and Communicative Disorders and Stroke, Bethesda.

Arch Otolaryngol. 1977;103(6):326-328. doi:10.1001/archotol.1977.00780230048005

• Auditory nerve and brain stem evoked responses were summated from multiple scalp and earlobe electrodes from five subjects with normal hearing to determine the spatial voltage relationships along the coronal and/or sagittal planes that make up the electrode array. All recordings maintained their positive polarity, and polarity inversions were not observed at any cephalic sites; thus, a null potential line was not identified for these short-latency potentials at the scalp. Less distinct potentials were derived from the earlobes when referenced to the chin. Linked earlobes generated some potentials of negative polarity. These observations lend additional support to the concept that early auditory scalp potentials are most likely generated from far field neural aggregates located caudally to the auditory cortex.

(Arch Otolaryngol 103:326-328, 1977)

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