Spectral characteristics of short latency auditory evoked potentials

Khachunts, A. S.; Vaganyan, L. G.; Bagdasaryan, Robert; Tatevosyan, N. E.; Tatevosyan, I. G.; Kostanyan, E. G.; Bilyan, R. N.; Manasyan, K. A.

doi:10.1007/bf02760727

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…These ABRs had central FFT frequencies that were significantly higher than for 100 s clicks and A-Chirps in band A, and significantly higher than for 100 s clicks in band B. Head trauma, coma, epilepsy, multiple sclerosis, and neurinomas of the acoustic nerve are all conditions that are known to affect the location of each of the major FFT peaks, 65,66 but these conditions were absent in our healthy subjects. The position of the recording electrode is also known to shift the frequencies of the FFT peaks, as is stimulus polarity.…”

Section: Fft Frequency Shiftsmentioning

confidence: 60%

“…Phase information, as in the CSM, has been shown previously to be a better predictor of auditory function than amplitude information. 73,74 Khachunts et al 66 analyzed the FFT spectra of normal and pathological ears and suggested that the presence of more than three main FFT peaks was indicative of a pathology such as epilepsy or neurinoma of the acoustic nerve. Moller 54 also suggested that the splitting of FFT peaks is due to phase-locked synchronization between nerve bundles as a result of myelin injury, as in multiple sclerosis.…”

Section: Additional Peak At 830 Hzmentioning

confidence: 99%

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Spectral and synchrony differences in auditory brainstem responses evoked by chirps of varying durations

Petoe

Bradley

Wilson

2010

The Journal of the Acoustical Society of America

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The chirp-evoked ABR has been termed a more synchronous response, referring to the fact that rising-frequency chirp stimuli theoretically compensate for temporal dispersions down the basilar membrane. This compensation is made possible by delaying the higher frequency content of the stimulus until the lower frequency traveling waves are closer to the cochlea apex. However, it is not yet clear how sensitive this temporal compensation is to variation in the delay interval. This study analyzed chirp-and click-evoked ABRs at low intensity, using a variety of tools in the time, frequency, and phase domains, to measure synchrony in the response. Additionally, this study also examined the relationship between chirp sweep rate and response synchrony by varying the delay between high-and low-frequency portions of chirp stimuli. The results suggest that the chirp-evoked ABRs in this study exhibited more synchrony than the click-evoked ABRs and that slight gender-based differences exist in the synchrony of chirp-evoked ABRs. The study concludes that a tailoring of chirp parameters to gender may be beneficial in pathologies that severely affect neural synchrony, but that such a customization may not be necessary in routine clinical applications.

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Section: Fft Frequency Shiftsmentioning

confidence: 60%