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

The Journal of the Acoustical Society of America
Matthew A PetoeWayne J Wilson

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.

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Citations

Oct 26, 2010·The Journal of the Acoustical Society of America·Matthew A PetoeWayne J Wilson
Feb 1, 2013·The Journal of the Acoustical Society of America·Magdalena WojtczakAndrew J Oxenham
Jan 28, 2012·The Journal of the Acoustical Society of America·Magdalena WojtczakAndrew J Oxenham
Mar 20, 2012·The Journal of the Acoustical Society of America·Claus ElberlingManuel Don
Mar 19, 2014·International Journal of Pediatric Otorhinolaryngology·Zheng-min XuZhi-hong Yao
Mar 5, 2015·International Journal of Audiology·Ethan I HuangJ Robert Boston
Feb 18, 2012·International Journal of Pediatric Otorhinolaryngology·Claus-Michael SchmidtArne Knief
Jul 12, 2014·International Journal of Audiology·Kensi M Cobb, Andrew Stuart
Apr 19, 2017·International Journal of Audiology·Ahmad Aidil Arafat DzulkarnainMuhammad Amar Mohd Ruzai
Jul 30, 2014·Ear and Hearing·Andrew Stuart, Kensi M Cobb
Sep 24, 2020·American Journal of Audiology·Ahmad Aidil Arafat DzulkarnainMohd Naufal Shah Mazlan
Jun 25, 2020·Journal of Audiology & Otology·Fatin Nabilah JamalMuhammad Nasrullah Marzuki
Aug 25, 2021·Journal of Audiology & Otology·Ahmad Aidil Arafat DzulkarnainMohd Normani Zakaria

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