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Published on: December 9, 2022
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Brain plasticity and hearing disorders
M Alzaher1, N Vannson1, O Deguine2
1Université de Toulouse, UPS, centre de recherche cerveau et cognition, Toulouse, France; CNRS, CerCo, France.
Revue Neurologique
|October 18, 2021
Summary
Brain plasticity, or compensatory plasticity, adapts to hearing loss. This review explores how cross-modal and intra-modal plasticity affect hearing restoration with cochlear implants, impacting auditory function and rehabilitation.
Area of Science:
- Neuroscience
- Auditory Neuroscience
- Rehabilitation Science
Background:
- Sensory stimulation changes brain functional connectivity in healthy individuals and those with pathology.
- Compensatory plasticity refers to adaptive brain modifications in response to pathology, altering functional connectivity.
- Auditory deficits and their severity influence brain reorganization and rehabilitation outcomes.
Purpose of the Study:
- To review cross-modal and intra-modal brain plasticity in relation to bilateral and unilateral hearing loss.
- To examine the impact of plasticity on hearing restoration via cochlear implantation.
- To discuss the implications of brain plasticity for developing evidence-based rehabilitation strategies.
Main Methods:
- Literature review of studies on brain plasticity and hearing loss.
- Analysis of research on cross-modal plasticity (e.g., visual influences on auditory cortex).
- Examination of intra-modal plasticity, including interhemispheric asymmetry in hearing loss.
Main Results:
- Cross-modal plasticity can be beneficial for visuo-auditory adaptation but detrimental if it impairs auditory cortex function for cochlear implant restoration.
- Loss of interhemispheric asymmetry in unilateral hearing loss negatively affects auditory spatial localization.
- Understanding brain plasticity is crucial for improving patient rehabilitation outcomes.
Conclusions:
- Brain plasticity plays a significant role in the adaptation and rehabilitation of individuals with hearing loss.
- Cochlear implantation outcomes are influenced by the interplay of cross-modal and intra-modal plasticity.
- Integrating cognitive neuroscience with neuroimaging biomarkers can enhance prognostic and evidence-based rehabilitation approaches.
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