Characteristics of the Deconvolved Transient AEP from 80 Hz Steady-State Responses to Amplitude Modulation Stimulation

Wang, Tao; Chen, Yuner; Fu, Qiuyang; Tan, Xiaodan

doi:10.1007/s10162-021-00806-2

Cited by 1 publication

(1 citation statement)

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“…Periodic responses at the lower pulse rates, (e.g., < 256 pps) contained multi-peaked structures comparable to auditory brainstem responses (ABR) to single acoustic clicks in cats (Achor and Starr 1980;Jewett 1970). At higher pulse rates, waveforms tended to become more sinusoidal, possibly due the interference patterns of individual responses at shorter inter-pulse intervals (e.g., Wang et al 2021). The amplitude spectra showed distinct peaks that corresponded to the pulse rate but also contained peaks at several higher harmonics.…”

Section: Ffrmentioning

confidence: 96%

Temporal Pitch Sensitivity in an Animal Model: Psychophysics and Scalp Recordings

Richardson

Guérit

Gransier

et al. 2022

JARO

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Cochlear implant (CI) users show limited sensitivity to the temporal pitch conveyed by electric stimulation, contributing to impaired perception of music and of speech in noise. Neurophysiological studies in cats suggest that this limitation is due, in part, to poor transmission of the temporal fine structure (TFS) by the brainstem pathways that are activated by electrical cochlear stimulation. It remains unknown, however, how that neural limit might influence perception in the same animal model. For that reason, we developed non-invasive psychophysical and electrophysiological measures of temporal (i.e., non-spectral) pitch processing in the cat. Normal-hearing (NH) cats were presented with acoustic pulse trains consisting of band-limited harmonic complexes that simulated CI stimulation of the basal cochlea while removing cochlear place-of-excitation cues. In the psychophysical procedure, trained cats detected changes from a base pulse rate to a higher pulse rate. In the scalp-recording procedure, the cortical-evoked acoustic change complex (ACC) and brainstem-generated frequency following response (FFR) were recorded simultaneously in sedated cats for pulse trains that alternated between the base and higher rates. The range of perceptual sensitivity to temporal pitch broadly resembled that of humans but was shifted to somewhat higher rates. The ACC largely paralleled these perceptual patterns, validating its use as an objective measure of temporal pitch sensitivity. The phase-locked FFR, in contrast, showed strong brainstem encoding for all tested pulse rates. These measures demonstrate the cat’s perceptual sensitivity to pitch in the absence of cochlear-place cues and may be valuable for evaluating neural mechanisms of temporal pitch perception in the feline animal model of stimulation by a CI or novel auditory prostheses.

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Section: Ffrmentioning

confidence: 96%