On chirp stimuli and neural synchrony in the suprathreshold auditory brainstem response

Petoe, Matthew .A, Bradley, Andrew P. and Wilson, Wayne J. (2010) On chirp stimuli and neural synchrony in the suprathreshold auditory brainstem response. Journal of the Acoustical Society of America, 128 1: 235-246. doi:10.1121/1.3436527

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Author Petoe, Matthew .A
Bradley, Andrew P.
Wilson, Wayne J.
Title On chirp stimuli and neural synchrony in the suprathreshold auditory brainstem response
Journal name Journal of the Acoustical Society of America   Check publisher's open access policy
ISSN 0001-4966
Publication date 2010-07
Year available 2010
Sub-type Article (original research)
DOI 10.1121/1.3436527
Open Access Status File (Publisher version)
Volume 128
Issue 1
Start page 235
End page 246
Total pages 12
Place of publication Melville, NY, United States
Publisher A I P Publishing LLC
Collection year 2011
Language eng
Formatted abstract
The chirp-evoked ABR has been regarded as a more synchronous response than the click-evoked ABR, referring to the belief that the chirp stimulates lower-, mid-, and higher-frequency regions of the cochlea simultaneously. In this study a variety of tools were used to analyze the synchronicity of ABRs evoked by chirp- and click-stimuli at 40 dB HL in 32 normal hearing subjects aged 18 to 55 years (mean=24.8 years, SD=7.1 years). Compared to the click-evoked ABRs, the chirp-evoked ABRs showed larger wave V amplitudes, but an absence of earlier waves in the grand averages, larger wave V latency variance, smaller FFT magnitudes at the higher component frequencies, and larger phase variance at the higher component frequencies. These results strongly suggest that the chirp-evoked ABRs exhibited less synchrony than the click-evoked ABRs in this study. It is proposed that the temporal compensation offered by chirp stimuli is sufficient to increase neural recruitment (as measured by wave V amplitude), but that destructive phase interactions still exist along the cochlea partition, particularly in the low frequency portions of the cochlea where more latency jitter is expected. The clinical implications of these findings are discussed.
© 2010 Acoustical Society of America.
Keyword Auditory evoked potentials
Phase spectral-analysis
Otoacoustic emissions
Impulse responses
Hearing subjects
Nerve fibers
Tone bursts
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Information Technology and Electrical Engineering Publications
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Citation counts: TR Web of Science Citation Count  Cited 11 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 11 times in Scopus Article | Citations
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Created: Sun, 01 Aug 2010, 00:03:29 EST