2011
DOI: 10.3109/00016489.2011.630016
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Characteristics of cochlear microphonics in infants and young children with auditory neuropathy

Abstract: The largest identifiable CMs were generally found between 0.5 and 0.8 ms after stimulation with mean delay of 0.63 ± 0.04 ms in both group A and the control group, and 0.63 ± 0.07 ms in group B. There was no significant difference between the AN group and the control group in CM time delay. There was no significant difference (p > 0.05) between group A (AN with OAEs present, 0.47 ± 0.15 μV) and the control group (0.45 ± 0.13 μV) in CM amplitude, while CM amplitudes in children with AN with DPOAEs absent (0.24 … Show more

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Cited by 22 publications
(21 citation statements)
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“…Because no significant differences were found between normal and NICU cases, the data are generalizable to both groups. The present finding regarding CM amplitude is in agreement with values reported by Young (2000) on the click-evoked CM amplitude obtained from 26 normal newborns, and also with amplitudes reported by Shi et al (2012) in a group of children under 3 years of age using a similar extratympanic recording method. In the past, it has been difficult to identify a method capable of recording the CM without the hindrance of stimulus artifact.…”
Section: Discussionsupporting
confidence: 93%
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“…Because no significant differences were found between normal and NICU cases, the data are generalizable to both groups. The present finding regarding CM amplitude is in agreement with values reported by Young (2000) on the click-evoked CM amplitude obtained from 26 normal newborns, and also with amplitudes reported by Shi et al (2012) in a group of children under 3 years of age using a similar extratympanic recording method. In the past, it has been difficult to identify a method capable of recording the CM without the hindrance of stimulus artifact.…”
Section: Discussionsupporting
confidence: 93%
“…The dashed lines indicate CM onset and offset (the initial and final crossings of the condensation and rarefaction tracings). The duration of the CM was defined as the interval from the onset time of the phase reversal after the initial stimulus artifact, to the time at which the phase reversals were no longer visually apparent (Shi et al, 2012). CM amplitude was measured using the method described by Shi et al (2012), in which the difference waveform (C-R/2) from peak-to-trough was determined for the largest wave within the duration of the CM (Fig.…”
Section: Methodsmentioning
confidence: 99%
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“…In an electrocochleography “very early auditory evoked potentials” (VEAEP) can be recorded. They include the cochlear microphonic potentials of hair cells (CM), the summation potential of the cochlea (SP), and the compound action potential of the auditory nerve (CAP) [ 43 ]. This examination is performed in anesthesia in infants and toddlers and is part of the diagnostics before a cochlear implant or is used for further differentiation of an AS/AN.…”
Section: Diagnostics and Causes Of Early Childhood Hearing Disordermentioning
confidence: 99%
“… 3 Clinically, the diagnostic criteria of AN/AD is defined as (1) sensorineural hearing loss, usually bilateral, of any degree; (2) normal outer hair cell function as evidenced by the presence of OAEs and/or CM; (3) absent or atypical ABR; (4) understanding of speech worse than would be predicted from the behavioral or pure tone audiometry; (5) absent acoustic reflexes to the ipsilateral and contralateral tones a 110-dB hearing level. 1 7 8 9 …”
Section: Introductionmentioning
confidence: 99%