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J Am Acad Audiol 1999; 10(04): 211-218
DOI: 10.1055/s-0042-1748482
Original Article

Test-Retest Stability and Short-Term Habituation of the Ν1 and Gamma Band Response

Gary P. Jacobson
Division of Audiology, Department of Otolaryngology—Head and Neck Surgery, Henry Ford Hospital, Detroit, Michigan
,
Devin L. McCaslin
Department of Speech and Hearing, The Ohio State University, Columbus, Ohio
,
Brien Smith
Department of Neurology, Henry Ford Medical Hospital, Detroit, Michigan
,
Kost Elisevich
Department of Neurological Surgery, Henry Ford Hospital, Detroit, Michigan
,
Pamela Mishler
Audiology and Speech Pathology Service, Veterans Administration Medical Center, Dayton, Ohio
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Abstract

The gamma band response (GBR) is an exogenous, cortically generated, event-related potential that occurs between 20– and 170–msec post-stimulus onset. The auditory GBR is superimposed on the transient evoked middle and long latency cortical auditory evoked potentials and demonstrates a peak spectral frequency between 30 and 40 Hz. The present investigations were conducted to evaluate the test-retest stability and short-term habituation of the GBR. Both the GBR and N1 were recorded from six normal-hearing, neurologically intact subjects (Investigation 1, test-retest stability) and two subjects with intractable epilepsy with implanted subdural electrode grid arrays (Investigation 2, short-term habituation characteristics). For Investigation 1, the test-retest interval was 1 month. For Investigation 2,300 samples were acquired per stimulus block (a 10-minute interval) and then subaveraged in blocks of 25 to 50 samples each. Results suggest that (1) like N1 , the GBR shows high repeatability (qualitative) and test-retest stability (quantitative) and (2) the GBR does not demonstrate evidence of short-term habituation.

Abbreviations: aeGBR = auditory evoked gamma band magnetic field; aeGBP = auditory evoked gamma band potential; AEP = auditory evoked potential; ECD = equivalent current dipole; GBR = gamma band response; ISI = interstimulus interval; MEG = magnetoencephalography; MRI = magnetic resonance imaging; N1 = N1 component of the long latency response

Key Words

Auditory evoked potential - gamma band response - habituation


Publication History

Article published online:
28 April 2022

© 1999. American Academy of Audiology. This article is published by Thieme.

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