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Article

Frontal Cortical Modulation of Temporal Visual Cross-Modal Re-organization in Adults with Hearing Loss

by 1 and 2,*
1
Central Sensory Processes Laboratory, Department of Communication Sciences and Disorders, University of Texas at Austin, 2504 Whitis Ave a1100, Austin, TX 78712, USA
2
Anu Sharma, Brain and Behavior Laboratory, Institute of Cognitive Science, Department of Speech, Language and Hearing Science, University of Colorado at Boulder, 409 UCB, 2501 Kittredge Loop Drive, Boulder, CO 80309, USA
*
Author to whom correspondence should be addressed.
Brain Sci. 2020, 10(8), 498; https://doi.org/10.3390/brainsci10080498
Received: 7 July 2020 / Revised: 24 July 2020 / Accepted: 27 July 2020 / Published: 30 July 2020
Recent research has demonstrated frontal cortical involvement to co-occur with visual re-organization, suggestive of top-down modulation of cross-modal mechanisms. However, it is unclear whether top-down modulation of visual re-organization takes place in mild hearing loss, or is dependent upon greater degrees of hearing loss severity. Thus, the purpose of this study was to determine if frontal top-down modulation of visual cross-modal re-organization increased across hearing loss severity. We recorded visual evoked potentials (VEPs) in response to apparent motion stimuli in 17 adults with mild-moderate hearing loss using 128-channel high-density electroencephalography (EEG). Current density reconstructions (CDRs) were generated using sLORETA to visualize VEP generators in both groups. VEP latency and amplitude in frontal regions of interest (ROIs) were compared between groups and correlated with auditory behavioral measures. Activation of frontal networks in response to visual stimulation increased across mild to moderate hearing loss, with simultaneous activation of the temporal cortex. In addition, group differences in VEP latency and amplitude correlated with auditory behavioral measures. Overall, these findings support the hypothesis that frontal top-down modulation of visual cross-modal re-organization is dependent upon hearing loss severity. View Full-Text
Keywords: sLORETA; high-density EEG; mild-moderate hearing loss; visual evoked potentials; speech perception; visual cross-modal re-organization; top-down modulation; frontal cortex; cognitive load; listening effort sLORETA; high-density EEG; mild-moderate hearing loss; visual evoked potentials; speech perception; visual cross-modal re-organization; top-down modulation; frontal cortex; cognitive load; listening effort
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MDPI and ACS Style

Campbell, J.; Sharma, A. Frontal Cortical Modulation of Temporal Visual Cross-Modal Re-organization in Adults with Hearing Loss. Brain Sci. 2020, 10, 498. https://doi.org/10.3390/brainsci10080498

AMA Style

Campbell J, Sharma A. Frontal Cortical Modulation of Temporal Visual Cross-Modal Re-organization in Adults with Hearing Loss. Brain Sciences. 2020; 10(8):498. https://doi.org/10.3390/brainsci10080498

Chicago/Turabian Style

Campbell, Julia, and Anu Sharma. 2020. "Frontal Cortical Modulation of Temporal Visual Cross-Modal Re-organization in Adults with Hearing Loss" Brain Sciences 10, no. 8: 498. https://doi.org/10.3390/brainsci10080498

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