Vestibular status: A missing factor in our understanding of brain reorganization in deaf individuals

Moïn-Darbari, Karina; Lafontaine, Louise; Maheu, Maxime; Bacon, Benoît A.; Champoux, François

doi:10.1016/j.cortex.2021.02.012

Cited by 6 publications

(4 citation statements)

References 90 publications

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“…As such, future studies should focus on determining the impact of concomitant vestibular dysfunction. Indeed, hearing and vestibular loss have great comorbidity [26] and vestibular dysfunction in adults aged over 40 is highly prevalent [27,28]. However, the impact of vestibular dysfunction may be difficult to determine in the elderly.…”

Section: Discussionmentioning

confidence: 99%

Sensory Reweighting for Postural Control in Older Adults with Age-Related Hearing Loss

Behtani,

Paromov,

Moïn-Darbari

et al. 2023

Brain Sciences

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There is growing evidence linking hearing impairments and the deterioration of postural stability in older adults. To our knowledge, however, no study to date has investigated the effect of age-related hearing loss on the sensory reweighting process during postural control. In the absence of data, much is unknown about the possible mechanisms, both deleterious and compensatory, that could underly the deterioration of postural control following hearing loss in the elderly. The aim of this study was to empirically examine sensory reweighting for postural control in older adults with age-related hearing loss as compared to older adults with normal hearing. The center of pressure of all participants was recorded using a force platform and the modified clinical test of sensory interaction and balance protocol. The results suggest that individuals with age-related hearing loss displayed increased somatosensory reliance relative to normal hearing younger adults. This increased reliance on somatosensory input does not appear to be effective in mitigating the loss of postural control, probably due to the concomitant deterioration of tactile and proprioceptive sensitivity and acuity associated with aging. Beyond helping to further define the role of auditory perception in postural control, these results further the understanding of sensory-related mechanisms associated with postural instability in older adults.

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Section: Discussionmentioning

confidence: 99%

Sensory Reweighting for Postural Control in Older Adults with Age-Related Hearing Loss

Behtani,

Paromov,

Moïn-Darbari

et al. 2023

Brain Sciences

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“… 111–117 Vestibular function has critical impacts on perception, motor and body-related processes. 110 , 118–122 Therefore, vestibular deficits might explain some of the present results. As a matter of fact, a critical area in the left PPC showed abnormally enhanced neural activity during egocentric processing in the deaf group of the present study ( Fig.…”

Section: Discussionmentioning

confidence: 67%

“…Although according to participants’ self-reports all the deaf participants in the present study experienced no balance problems, congenitally deaf people are generally unaware of concomitant vestibular damages. 110 Moreover, hearing loss has a high comorbidity rate with vestibular impairments (up to 70%). 111–117 Vestibular function has critical impacts on perception, motor and body-related processes.…”

Section: Discussionmentioning

confidence: 99%

Impaired body-centred sensorimotor transformations in congenitally deaf people

Song

Wang

et al. 2022

Brain Communications

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Congenital deafness modifies an individual’s daily interaction with the environment and alters the fundamental perception of the external world. How congenital deafness shapes the interface between the internal and external worlds remains poorly understood. To interact efficiently with the external world, visuospatial representations of external target objects need to be effectively transformed into sensorimotor representations with reference to the body. Here, we tested the hypothesis that egocentric body-centered sensorimotor transformation is impaired in congenital deafness. Consistent with this hypothesis, we found that congenital deafness induced impairments in egocentric judgments needed to associate the external objects with the internal body. These impairments were due to deficient body-centered sensorimotor transformation per se, rather than the reduced fidelity of the visuospatial representations of the egocentric positions. At the neural level, we first replicated the previously well-documented critical involvement of the fronto-parietal network in egocentric processing, in both congenitally deaf participants and hearing controls. However, both the strength of neural activity and the intra-network connectivity within the fronto-parietal network alone could not account for egocentric performance variance. Instead, the inter-network connectivity between the task-positive fronto-parietal network and the task-negative default-mode network was significantly correlated with egocentric performance: the more cross-talking between them, the worse the egocentric judgment. Accordingly, the impaired egocentric performance in the deaf group was related to increased inter-network connectivity between the fronto-parietal network and the default-mode network and decreased intra-network connectivity within the default-mode network. The altered neural network dynamics in congenital deafness were observed for both evoked neural activity during egocentric processing and intrinsic neural activity during rest. Our findings thus not only demonstrate the optimal network configurations between the task-positive and -negative neural networks underlying coherent body-centered sensorimotor transformations but also unravel a critical cause (i.e., impaired body-centered sensorimotor transformation) of a variety of hitherto unexplained difficulties in sensory-guided movements the deaf population experiences in their daily life.

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“…All participants who presented with neurological, sensory or motor impairments were excluded from the study. Specifically previous studies have shown the role of the vestibular function in multisensory processing and its associated alteration in deafness ( Moïn-Darbari et al, 2021, Ponzo et al, 2019. Care was taken to exclude patients with vestibular dysfunction as it would impact on oculomotor strategies and high level sensori-motor functions (see Moïn-Darbari et al, 2021 for a recent review).…”

Section: Participantsmentioning

confidence: 99%

Supra-normal skills in processing of visuo-auditory prosodic information by cochlear-implanted deaf patients

et al. 2021

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Vestibular status: A missing factor in our understanding of brain reorganization in deaf individuals

Cited by 6 publications

References 90 publications

Sensory Reweighting for Postural Control in Older Adults with Age-Related Hearing Loss

Sensory Reweighting for Postural Control in Older Adults with Age-Related Hearing Loss

Impaired body-centred sensorimotor transformations in congenitally deaf people

Supra-normal skills in processing of visuo-auditory prosodic information by cochlear-implanted deaf patients

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