Comparison of psychophysical and evoked-potential tuning curves in the chinchilla

Salvi, Richard; Ahroon, William A.; Perry, John; Gunnarson, Adele D.; Henderson, D.

doi:10.1016/s0196-0709(82)80018-5

Cited by 58 publications

(19 citation statements)

References 19 publications

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“…2B) have been measured in several laboratories (25)(26)(27)(28). The only study in chinchilla that measured both FM and SM PsychTCs reported that they had similar bandwidths (25).…”

Section: Methodsmentioning

confidence: 99%

Unexceptional sharpness of frequency tuning in the human cochlea

Ruggero

Temchin

2005

Proc. Natl. Acad. Sci. U.S.A.

106

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The responses to sound of auditory-nerve fibers are well known in many animals but are topics of conjecture for humans. Some investigators have claimed that the auditory-nerve fibers of humans are more sharply tuned than are those of various experimental animals. Here we invalidate such claims. First, we show that forward-masking psychophysical tuning curves, which were used as the principal support for those claims, greatly overestimate the sharpness of cochlear tuning in experimental animals and, hence, also probably in humans. Second, we calibrate compound action potential tuning curves against the tuning of auditory-nerve fibers in experimental animals and use compound action potential tuning curves recorded in humans to show that the sharpness of tuning in human cochleae is not exceptional and that it is actually similar to tuning in all mammals and birds for which comparisons are possible. Third, we note that the similarity of frequency of tuning across species with widely diverse cochlear lengths and auditory bandwidths implies that for any given stimulus frequency the ''cochlear amplifier'' is confined to a highly localized region of the cochlea.auditory nerve ͉ basilar membrane ͉ masking ͉ compound action potential ͉ psychophysical tuning curve

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“…2B) have been measured in several laboratories (25)(26)(27)(28). The only study in chinchilla that measured both FM and SM PsychTCs reported that they had similar bandwidths (25).…”

Section: Methodsmentioning

confidence: 99%

Unexceptional sharpness of frequency tuning in the human cochlea

Ruggero

Temchin

2005

Proc. Natl. Acad. Sci. U.S.A.

106

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“…Each animal was anesthetized [IM injection of Ketamine (35 mg/kg) and Xylazine (1 mg/kg)] and made monaural by the surgical destruction of the left cochlea. During this procedure a bipolar electrode was implanted, under stereotaxic control, into the left inferior colliculus and the electrode plug cemented to the skull for the recording of the auditory evoked potential (AEP) (Henderson et al, 1973;Salvi et al, 1982). The AEP was used to estimate pure tone thresholds.…”

Section: A Auditory Evoked Potentialmentioning

confidence: 99%

The value of a kurtosis metric in estimating the hazard to hearing of complex industrial noise exposures

Qiu

Hamernik

Davis

2013

The Journal of the Acoustical Society of America

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A series of Gaussian and non-Gaussian equal energy noise exposures were designed with the objective of establishing the extent to which the kurtosis statistic could be used to grade the severity of noise trauma produced by the exposures. Here, 225 chinchillas distributed in 29 groups, with 6 to 8 animals per group, were exposed at 97 dB SPL. The equal energy exposures were presented either continuously for 5 d or on an interrupted schedule for 19 d. The non-Gaussian noises all differed in the level of the kurtosis statistic or in the temporal structure of the noise, where the latter was defined by different peak, interval, and duration histograms of the impact noise transients embedded in the noise signal. Noise-induced trauma was estimated from auditory evoked potential hearing thresholds and surface preparation histology that quantified sensory cell loss. Results indicated that the equal energy hypothesis is a valid unifying principle for estimating the consequences of an exposure if and only if the equivalent energy exposures had the same kurtosis. Furthermore, for the same level of kurtosis the detailed temporal structure of an exposure does not have a strong effect on trauma.

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“…injection of Ketamine (35 mg/kg) and Xyalazine (1 mg/kg)] and made monaural by the surgical destruction of the left cochlea. During this procedure a bipolar electrode was implanted, under stereotaxic control, into the left inferior colliculus and the electrode plug cemented to the skull for the recording of auditory evoked potentials (Henderson et al, 1973;Salvi et al, 1982). The auditory evoked potential (AEP) was used to estimate pure tone thresholds.…”

Section: Auditory Evoked Potentialmentioning

confidence: 99%