Effect of subject task on contralateral suppression of click evoked otoacoustic emissions

Boer, Jessica de; Thornton, A. R. D.

doi:10.1016/j.heares.2007.08.002

Cited by 78 publications

(108 citation statements)

References 33 publications

(32 reference statements)

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“…The interaction is significant for amplitude suppression only at the lower CEOAE stimulus level and more significant for the I/O suppression measure. This level dependence of the interaction of the contralateral suppression measure is very similar to that observed in an earlier study in our laboratory (de Boer and Thornton, 2007) and is likely to reflect the characteristic compressive nonlinearity of the cochlear amplification mechanism. The stronger effect found for the I/O slope may result from the fact that this measure is more directly and exclusively dependent on the gain of this amplification mechanism, which underlies EOAE generation, than the CEOAE amplitude.…”

Section: Physiological Resultssupporting

confidence: 86%

“…In particular, contralateral suppression of EOAEs was enhanced when attention was directed to the contralateral ear (Maison et al, 2001) and decreased when attention was directed toward the ipsilateral ear (de Boer and Thornton, 2007). It is possible that, in our results, MOCB activity reflected the extent or focus of attention paid by listeners to the ipsilateral sound stimuli.…”

Section: Mocb and Attentionmentioning

confidence: 61%

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Neural Correlates of Perceptual Learning in the Auditory Brainstem: Efferent Activity Predicts and Reflects Improvement at a Speech-in-Noise Discrimination Task

Boer¹,

Thornton²

2008

J. Neurosci.

182

170

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An extensive corticofugal system extends from the auditory cortex toward subcortical nuclei along the auditory pathway. Corticofugal influences reach even into the inner ear via the efferents of the olivocochlear bundle, the medial branch of which modulates preneural sound amplification gain. This corticofugal system is thought to contribute to neuroplasticity underlying auditory perceptual learning. In the present study, we investigated the involvement of the medial olivocochlear bundle (MOCB) in perceptual learning as a result of auditory training. MOCB activity was monitored in normal-hearing adult listeners during a 5 d training regimen on a consonant-vowel phoneme-in-noise discrimination task. The results show significant group learning, with great inter-individual variability in initial performance and improvement. As observed in previous auditory training studies, poor initial performers tended to show greater learning. Strikingly, MOCB activity measured on the first training day strongly predicted the subsequent amount of improvement, such that weaker initial MOCB activity was associated with greater improvement. Moreover, in listeners that improved significantly, an increase in MOCB activity was observed after training. Thus, as discrimination thresholds of listeners converged over the course of training, differences in MOCB activity between listeners decreased. Additional analysis showed that MOCB activity did not explain variation in performance between listeners on any training day but rather reflected an individual listener's performance relative to their personal optimal range. The findings suggest an MOCB-mediated listening strategy that facilitates speech-in-noise perception. The operation of this strategy is flexible and susceptible to training, presumably because of task-related adaptation of descending control from the cortex.

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Section: Physiological Resultssupporting

confidence: 86%

Section: Mocb and Attentionmentioning

confidence: 61%

Neural Correlates of Perceptual Learning in the Auditory Brainstem: Efferent Activity Predicts and Reflects Improvement at a Speech-in-Noise Discrimination Task

Boer¹,

Thornton²

2008

J. Neurosci.

182

170

View full text Add to dashboard Cite

show abstract

“…Furthermore, our nSFOAE measures were perstimulatory-made during the presentation of the OAE-evoking stimulus-rather than after its offset, as is the case for toneevoked and click-evoked OAEs. This may have provided an advantage over some previous procedures (e.g., de Boer and Thornton, 2007;Ferber-Viart et al, 1995;Giard et al, 1994;Harkrider and Bowers, 2009;Meric and Collet, 1994;Puel et al, 1988).…”

Section: Summary and Discussionmentioning

confidence: 98%

Changes in otoacoustic emissions during selective auditory and visual attention

Walsh

Pasanen

McFadden

2015

The Journal of the Acoustical Society of America

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Previous studies have demonstrated that the otoacoustic emissions (OAEs) measured during behavioral tasks can have different magnitudes when subjects are attending selectively or not attending. The implication is that the cognitive and perceptual demands of a task can affect the first neural stage of auditory processing-the sensory receptors themselves. However, the directions of the reported attentional effects have been inconsistent, the magnitudes of the observed differences typically have been small, and comparisons across studies have been made difficult by significant procedural differences. In this study, a nonlinear version of the stimulus-frequency OAE (SFOAE), called the nSFOAE, was used to measure cochlear responses from human subjects while they simultaneously performed behavioral tasks requiring selective auditory attention (dichotic or diotic listening), selective visual attention, or relative inattention. Within subjects, the differences in nSFOAE magnitude between inattention and attention conditions were about 2-3 dB for both auditory and visual modalities, and the effect sizes for the differences typically were large for both nSFOAE magnitude and phase. These results reveal that the cochlear efferent reflex is differentially active during selective attention and inattention, for both auditory and visual tasks, although they do not reveal how attention is improved when efferent activity is greater.

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“…The MOC effect was evoked without any attempt to monitor or control the subject's attention toward the contralateral noise activator. This may be relevant because the MOC effect can be modulated by attention (de Boer & Thornton, 2007;Froehlich et al, 1993;Harkrider & Bowers, 2009;Maison et al, 2001). The directions of reported attention effects are not well defined and are inconsistent; Harkrider and Bowers (2009) demonstrated decreases in the MOC reflex, whereas earlier studies showed an increase in MOC effects (Maison et al, 2001) with attention.…”

Section: Discussionmentioning

confidence: 99%

“…MOC effects have been linked to enhanced listening in noise and protection from acoustic trauma (Froehlich, Collet, & Morgon, 1993;Giard, Collet, Bouchet, & Pernier, 1994;Giraud et al, 1997;Kumar & Vanaja, 2004;Maison & Liberman, 2000). These effects can be modulated by attention and are task dependent (de Boer & Thornton, 2007;Froehlich et al, 1993;Maison, Micheyl, & Collet, 2001;Meric, Micheyl, & Collet, 1996).…”

mentioning

confidence: 99%

Stability of the Medial Olivocochlear Reflex as Measured by Distortion Product Otoacoustic Emissions

Mishra

Abdala

2015

J Speech Lang Hear Res

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Purpose: The purpose of this study was to assess the repeatability of a fine-resolution, distortion product otoacoustic emission (DPOAE)-based assay of the medial olivocochlear (MOC) reflex in normal-hearing adults. Method: Data were collected during 36 test sessions from 4 normal-hearing adults to assess short-term stability and 5 normal-hearing adults to assess long-term stability. DPOAE level and phase measurements were recorded with and without contralateral acoustic stimulation. MOC reflex indices were computed by (a) noting contralateral acoustic stimulation-induced changes in DPOAE level (both absolute and normalized) at fine-structure peaks, (b) recording the effect as a vector difference, and (c) separating DPOAE components and considering a component-specific metric.Results: Analyses indicated good repeatability of all indices of the MOC reflex in most frequency ranges. Short-and long-term repeatability were generally comparable. Indices normalized to a subject's own baseline fared best, showing strong short-and long-term stability across all frequency intervals. Conclusions: These results suggest that fine-resolution DPOAE-based measures of the MOC reflex measured at strategic frequencies are stable, and natural variance from day-to-day or week-to-week durations is small enough to detect between-group differences and possibly to monitor intervention-related success. However, this is an empirical question that must be directly tested to confirm its utility.

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Effect of subject task on contralateral suppression of click evoked otoacoustic emissions

Cited by 78 publications

References 33 publications

Neural Correlates of Perceptual Learning in the Auditory Brainstem: Efferent Activity Predicts and Reflects Improvement at a Speech-in-Noise Discrimination Task

Neural Correlates of Perceptual Learning in the Auditory Brainstem: Efferent Activity Predicts and Reflects Improvement at a Speech-in-Noise Discrimination Task

Changes in otoacoustic emissions during selective auditory and visual attention

Stability of the Medial Olivocochlear Reflex as Measured by Distortion Product Otoacoustic Emissions

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