Efferent auditory system: its effect on auditory processing

Burguetti, Fernanda Acaui Ribeiro; Carvallo, Renata Mota Mamede

doi:10.1016/s1808-8694(15)31385-9

Cited by 27 publications

(31 citation statements)

References 22 publications

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“…12 Our results are also similar with those of another study showing that the mean suppression values in controls were higher than those in the study group, which suggested a decreased inhibitory effect in the auditory efferent system of subjects with disordered auditory processing. 9 There was no agreement with regards to the presence of contralateral acoustic reflexes and DPOAE suppression in both ears in the entire sample (Tables 5 and 6). Thus, we suggest that the efferent function assessed by DPOAE suppression testing is related with improved speech understanding in noisy environments, as ambient noise has a similar intensity to that of the test.…”

Section: Discussionmentioning

confidence: 90%

“…9 The result is that speech understanding in competing noise is compromised, as auditory efferent fibers are activated in the presence of loud noise, altering the mechanics of outer hair cells, thereby reducing the quality of the sound message. 10 The contraction of intratympanic muscles and the ability to discriminate sounds in the presence of noise are regulated by the superior olivary complex; 11 thus, it is possible that altered acoustic reflexes may compromise speech intelligibility in noisy environments.…”

Section: Discussionmentioning

confidence: 99%

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Reconhecimento de fala em presença de ruído e suas relações com a supressão das emissões otoacústicas e o reflexo acústico

Lautenschlager¹,

Tochetto

Costa

2011

Braz. j. otorhinolaryngol. (Impr.)

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Subj ects presenting difficulties in understanding speech with competing sounds may have absence of otoacoustic emission suppression and the acoustic reflex. Aim:To study the performance of the efferent auditory system in normal hearing subjects complaining of difficulties to understand speech in noise. Material and methods:A prospective study comprising 50 normal-hearing subjects aged from 19 to 32 years, reporting difficulties with speech recognition in noise (with complaints -WC) or not (with no complaints -WNC). Distortion product evoked otoacoustic emissions (DPOAEs) were tested at frequencies from 1500 to 6000 Hz.The contralateral acoustic reflex (CAR) was investigated from 500 to 4000 Hz.Results: Groups differed statistically as to the occurrence of CAR in the left ear at 4000 Hz. At 1500 Hz, there was a statistically significant effect -absence of DPOAEs in the WC group in the right ear. In left ears, absence of DPOAE suppression was higher in the WC at 1500 Hz and 2000 Hz. Conclusion:An association between self-reported difficulties in discriminating speech in noise and the absence of contralateral acoustic reflex at 4000 Hz in the left ear was observed; there was also absence of the suppression effect of DPOAEs, especially at middle frequencies in both ears. Braz J Otorhinolaryngol. 2011;77(1):115-20. BJORL ORIGINAL ARTICLE

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Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Reconhecimento de fala em presença de ruído e suas relações com a supressão das emissões otoacústicas e o reflexo acústico

Lautenschlager¹,

Tochetto

Costa

2011

Braz. j. otorhinolaryngol. (Impr.)

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“…There was no statistically significant difference in the Study group (Table 1) or in the Control group (Table 2). After having these results, the data from the two ears were combined, according to Burguetti & Carvallo 13 . We investigated if the TEOAE amplitudes without and with noise varied between the two groups ( Table 3).…”

Section: Discussionmentioning

confidence: 99%

O papel do sistema olivococlear medial em crianças portadoras de TDAH

Pereira

Feitosa

Pereira

et al. 2012

Braz. j. otorhinolaryngol.

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A ttention deficit hyperactivity disorder (ADHD) patients show, as one of the main symptoms, an attentional impairment. Selective attention in the hearing process is the ability to understand speech in a noisy environment, which can be evaluated by several methods. One of the main approaches is the functioning of the Medial Olivocochlear Efferent System, which can be accessed by TransientEvoked Otoacoustic Emissions (TOAE).Objective: This study aimed at evaluating the suppression effect of contralateral noise on TOAE in ADHD (study group) and normal subjects (control group). Study Design: Case-control study. Material and Methods:A study with 20 children distributed in two, age-and gender-matched groups. Results: No differences were found in TOAE responses between the two groups, with and without noise. Conclusions:We conclude that there were no functional differences in the Medial Olivocochlear Efferent System in the two groups analyzed. Braz J Otorhinolaryngol. 2012;78(3):27-31. ORIGINAL ARTICLE

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“…Middle-and long-latency auditory evoked potentials, as well as suppression of otoacoustic emissions (OAEs), have shown promise as early diagnostic parameters when considered in conjunction with auditory processing activities [Burguetti and Carvallo, 2008;Durante and Carvallo, 2008;Schochat et al, 2010]. Generated by normal nonlinear mechanisms within the cochlea, OAEs are thought to be the result of motile activity by the outer hair cells, which are innervated by the efferent nerve fibers of the olivocochlear bundle [Dallos, 1992;Rasmussen, 1946].…”

Section: Introductionmentioning

confidence: 99%

School-Age Outcomes in Preterm Children Born with Risk Factors for Hearing Loss: Contralateral Suppression of Transient Evoked Otoacoustic Emissions

Durante

Mariano

Pires

et al. 2012

Audiol Neurotol Extra

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We investigated the effect of contralateral suppression of linear transient evoked otoacoustic emissions (TEOAEs) in 16 preterm children born with risk factors for hearing loss. We evaluated those children, together with a control group of term children, at 8–10 years of age. The magnitude of the TEOAE suppression effect in both ears was significantly smaller in the preterm children than in the term children (p < 0.05). There is increasing evidence of adverse school-age outcomes (including hearing loss) in preterm children. Such outcomes can interfere with the school performance of those infants. The TEOAE suppression effect seems to be a promising early marker of hearing outcomes in preterm infants.

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Efferent auditory system: its effect on auditory processing

Abstract: The study group had lower OAE suppression values and higher acoustic reflex sensitization values when compared to the control group.

Cited by 27 publications

References 22 publications

Reconhecimento de fala em presença de ruído e suas relações com a supressão das emissões otoacústicas e o reflexo acústico

Reconhecimento de fala em presença de ruído e suas relações com a supressão das emissões otoacústicas e o reflexo acústico

O papel do sistema olivococlear medial em crianças portadoras de TDAH

School-Age Outcomes in Preterm Children Born with Risk Factors for Hearing Loss: Contralateral Suppression of Transient Evoked Otoacoustic Emissions

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