Pattern of neural divergence in adults with prelingual deafness: Based on structural brain analysis

Kumar, Uttam; Mishra, Mrutyunjaya

doi:10.1016/j.brainres.2018.07.021

Cited by 17 publications

(25 citation statements)

References 43 publications

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“…However, the results of studies have been inconsistent. For example, several studies found that gray matter density in the primary auditory cortex was preserved in prelingual deaf adults ( Kim et al, 2014 , Kumar and Mishra, 2018 ), whereas others have reported increased gray matter volume in infants ( Smith et al, 2011 ) and decreased gray matter volume in adults ( Olulade et al, 2014 ). Earlier and longer hearing aid use was also found to affect cross-modal reorganization induced by auditory deprivation ( Ding et al, 2015 ).…”

Section: Introductionmentioning

confidence: 99%

Altered regional activity and connectivity of functional brain networks in congenital unilateral conductive hearing loss

Yang

Liu

Fan

et al. 2021

NeuroImage: Clinical

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Highlights Focal brain function and seed-based functional connectivity were first analyzed in congenital unilateral CHL. Auditory and visual networks showed altered regional activity and functional connectivity. Abnormally high activity in the left ITG was positively correlated with duration of disease. Higher-order networks including frontoparietal regions and DMN demonstrated abnormal functional connectivity. GSR may produce spurious signals in SBFC analyses.

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Section: Introductionmentioning

confidence: 99%

Altered regional activity and connectivity of functional brain networks in congenital unilateral conductive hearing loss

Yang

Liu

Fan

et al. 2021

NeuroImage: Clinical

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“…The deaf and control groups are difficult to match in terms of level of education, since congenitally deaf people often do not have access to traditional education. However, some studies matched their groups for IQ ( Olulade et al, 2014 ; Kumar and Mishra, 2018 ), linguistic proficiency ( Penhune et al, 2003 ) or socio-economic status ( Feng et al, 2018 ). Supplementary Table 1 provides information about the demographic and main findings of the included papers.…”

Section: Resultsmentioning

confidence: 99%

Brain Morphological Modifications in Congenital and Acquired Auditory Deprivation: A Systematic Review and Coordinate-Based Meta-Analysis

Grégoire

Deggouj

Dricot³

et al. 2022

Front. Neurosci.

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Neuroplasticity following deafness has been widely demonstrated in both humans and animals, but the anatomical substrate of these changes is not yet clear in human brain. However, it is of high importance since hearing loss is a growing problem due to aging population. Moreover, knowing these brain changes could help to understand some disappointing results with cochlear implant, and therefore could improve hearing rehabilitation. A systematic review and a coordinate-based meta-analysis were realized about the morphological brain changes highlighted by MRI in severe to profound hearing loss, congenital and acquired before or after language onset. 25 papers were included in our review, concerning more than 400 deaf subjects, most of them presenting prelingual deafness. The most consistent finding is a volumetric decrease in gray matter around bilateral auditory cortex. This change was confirmed by the coordinate-based meta-analysis which shows three converging clusters in this region. The visual areas of deaf children is also significantly impacted, with a decrease of the volume of both gray and white matters. Finally, deafness is responsible of a gray matter increase within the cerebellum, especially at the right side. These results are largely discussed and compared with those from deaf animal models and blind humans, which demonstrate for example a much more consistent gray matter decrease along their respective primary sensory pathway. In human deafness, a lot of other factors than deafness could interact on the brain plasticity. One of the most important is the use of sign language and its age of acquisition, which induce among others changes within the hand motor region and the visual cortex. But other confounding factors exist which have been too little considered in the current literature, such as the etiology of the hearing impairment, the speech-reading ability, the hearing aid use, the frequent associated vestibular dysfunction or neurocognitive impairment. Another important weakness highlighted by this review concern the lack of papers about postlingual deafness, whereas it represents most of the deaf population. Further studies are needed to better understand these issues, and finally try to improve deafness rehabilitation.

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“…Various imaging studies have suggested marked structural and functional changes in the auditory and nonauditory regions of deaf individuals, thereby supporting neuroplasticity. [1][2][3][4][5] In addition, the involvement of the auditory cortex in deaf individuals is associated with tactile functions 6 and nonverbal communication abilities, thus supporting the concept of the compensatory reorganization of the brain due to sensory loss. However, such rewiring may be associated with the acquisition of new skills, such as sign language and alternative communication (e.g., eye gaze and gestures) in combination with hearing loss.…”

Section: Introductionmentioning

confidence: 65%

“…This cross‐modal visual enhancement in deaf individuals is directly associated with the intact auditory cortex and is termed cross‐modal plasticity or neuroplasticity. Various imaging studies have suggested marked structural and functional changes in the auditory and nonauditory regions of deaf individuals, thereby supporting neuroplasticity 1–5 . In addition, the involvement of the auditory cortex in deaf individuals is associated with tactile functions 6 and nonverbal communication abilities, thus supporting the concept of the compensatory reorganization of the brain due to sensory loss.…”

Section: Introductionmentioning

confidence: 90%

Alteration of brain resting‐state networks and functional connectivity in prelingual deafness

Kumar

Keshri

Mishra

2021

Journal of Neuroimaging

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Background and Purpose: Early hearing loss causes several changes in the brain structure and function at multiple levels; these changes can be observed through neuroimaging. These changes are directly associated with sensory loss (hearing) and the acquisition of alternative communication strategies. Such plasticity changes in the brain might establish a different connectivity pattern with resting-state networks (RSNs) and other brain regions. We performed resting-state functional magnetic resonance imaging (rsfMRI) to evaluate these intrinsic modifications. Methods:We used two methods to characterize the functional connectivity (FC) of RSN components in 20 prelingual deaf adults and 20 demographic-matched hearing adults. rsfMRI data were analyzed using independent component analysis (ICA) and region-ofinterest seed-to-voxel correlation analysis. Results:In ICA, we identified altered FC of RSNs in the deaf group. RSNs with altered FC were observed in higher visual, auditory, default mode, salience, and sensorimotor networks. The findings of seed-to-voxel correlation analysis suggested increased temporal coherence with other neural networks in the deaf group compared with the hearing control group. Conclusion:These findings suggest a highly diverse resting-state connectivity pattern in prelingual deaf adults resulting from compensatory cross-modal plasticity that includes both auditory and nonauditory regions.

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Pattern of neural divergence in adults with prelingual deafness: Based on structural brain analysis

Cited by 17 publications

References 43 publications

Altered regional activity and connectivity of functional brain networks in congenital unilateral conductive hearing loss

Altered regional activity and connectivity of functional brain networks in congenital unilateral conductive hearing loss

Brain Morphological Modifications in Congenital and Acquired Auditory Deprivation: A Systematic Review and Coordinate-Based Meta-Analysis

Alteration of brain resting‐state networks and functional connectivity in prelingual deafness

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