Somatosensory Cross-Modal Reorganization in Adults With Age-Related, Early-Stage Hearing Loss

Frontiers in Human Neuroscience
Garrett Cardon, Anu Sharma

Abstract

Under conditions of profound sensory deprivation, the brain has the propensity to reorganize. For example, intact sensory modalities often recruit deficient modalities' cortices for neural processing. This process is known as cross-modal reorganization and has been shown in congenitally and profoundly deaf patients. However, much less is known about cross-modal cortical reorganization in persons with less severe cases of age-related hearing loss (ARHL), even though such cases are far more common. Thus, we investigated cross-modal reorganization between the auditory and somatosensory modalities in older adults with normal hearing (NH) and mild-moderate ARHL in response to vibrotactile stimulation using high density electroencephalography (EEG). Results showed activation of the somatosensory cortices in adults with NH as well as those with hearing loss (HL). However, adults with mild-moderate ARHL also showed robust activation of auditory cortical regions in response to somatosensory stimulation. Neurophysiologic data exhibited significant correlations with speech perception in noise outcomes suggesting that the degree of cross-modal reorganization may be associated with functional performance. Our study presents the first eviden...Continue Reading

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Citations

Jul 18, 2019·Frontiers in Neuroscience·Garrett Cardon, Anu Sharma
Apr 13, 2021·Alzheimer's & Dementia : the Journal of the Alzheimer's Association·Jennifer A DealBonnielin K Swenor
May 24, 2021·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·Vanessa D Ruiz-StovelGeisa B Gallardo-Moreno
Aug 11, 2020·Current Opinion in Neurobiology·Sara Rj Gilissen, Lutgarde Arckens
Jun 12, 2021·Annals of the New York Academy of Sciences·Zahra JafariMajid H Mohajerani
Sep 10, 2021·Vestnik otorinolaringologii·N L KunelskayaG N Izotova

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Methods Mentioned

BETA
cochlear implants
cochlear implant

Software Mentioned

EEGLAB
Matlab
sLORETA
Prime
Netstation
SPSS
CURRY Scan 7 Neuroimaging Suite

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