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Visual Cross-Modal Re-Organization i...

Campbell, Julia Dee.

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Visual Cross-Modal Re-Organization in Children with Cochlear Implants.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Visual Cross-Modal Re-Organization in Children with Cochlear Implants./
Author:	Campbell, Julia Dee.
Description:	81 p.
Notes:	Source: Dissertation Abstracts International, Volume: 76-10(E), Section: B.
Contained By:	Dissertation Abstracts International76-10B(E).
Subject:	Audiology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3704659
ISBN:	9781321772470

Visual Cross-Modal Re-Organization in Children with Cochlear Implants.
Campbell, Julia Dee.

Visual Cross-Modal Re-Organization in Children with Cochlear Implants. - 81 p.

Source: Dissertation Abstracts International, Volume: 76-10(E), Section: B.

Thesis (Ph.D.)--University of Colorado at Boulder, 2015.

This item must not be sold to any third party vendors.

Background: Visual cross-modal re-organization is a neurophysiological process that occurs in deafness. The intact sensory modality of vision recruits cortical areas from the deprived sensory modality of audition. Such compensatory plasticity is documented in deaf adults and animals, and is related to deficits in speech perception performance in cochlear-implanted adults. However, it is unclear whether visual cross-modal re-organization takes place in cochlear-implanted children and is another source of variability contributing to speech perception and language outcomes.

ISBN: 9781321772470Subjects--Topical Terms:

537237
Audiology.

Visual Cross-Modal Re-Organization in Children with Cochlear Implants.
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020 $a 9781321772470
035 $a (MiAaPQ)AAI3704659
035 $a AAI3704659
040 $a MiAaPQ $c MiAaPQ
100 1 $a Campbell, Julia Dee. $3 3181338
245 1 0 $a Visual Cross-Modal Re-Organization in Children with Cochlear Implants.
300 $a 81 p.
500 $a Source: Dissertation Abstracts International, Volume: 76-10(E), Section: B.
500 $a Advisers: Anu Sharma; Phillip Gilley.
502 $a Thesis (Ph.D.)--University of Colorado at Boulder, 2015.
506 $a This item must not be sold to any third party vendors.
506 $a This item must not be added to any third party search indexes.
520 $a Background: Visual cross-modal re-organization is a neurophysiological process that occurs in deafness. The intact sensory modality of vision recruits cortical areas from the deprived sensory modality of audition. Such compensatory plasticity is documented in deaf adults and animals, and is related to deficits in speech perception performance in cochlear-implanted adults. However, it is unclear whether visual cross-modal re-organization takes place in cochlear-implanted children and is another source of variability contributing to speech perception and language outcomes.
520 $a Purpose: The aim of this study was to determine if visual cross-modal re-organization is apparent in cochlear-implanted children, and is related to speech perception performance in background noise.
520 $a Methods: Visual evoked potentials (VEP) were recorded via high-density EEG in normal hearing children, aged 5-15 years, in response to apparent motion and form change. Comparisons of VEP amplitude and latency, and source localization results, were conducted across age to view developmental changes. VEPs were recorded in response to the same visual stimuli in cochlear-implanted children, aged 5-15 years, and compared to the VEP and source localization results of the normal hearing children. Finally, speech perception in background noise performance was correlated to the visual response in the implanted children.
520 $a Results: Two VEP morphological patterns were observed in the normal hearing children, with no major developmental differences across patterns. Source localization showed no major differences according to morphological pattern or age, with responses in visual cortex. Cochlear-implanted children showed similar VEP morphological patterns, but with larger amplitudes and earlier latency concurrent with activation of right temporal cortex including auditory regions, suggestive of visual cross-modal re-organization. The VEP N1 latency was negatively related to speech perception in background noise.
520 $a Conclusions: Cochlear-implanted children presented evidence of visual cross-modal re-organization, which was related to poorer speech perception performance in background noise for the implanted children. Overall, the results of this study suggest that visual cross-modal re-organization may be a potential source of variability in speech perception outcomes for cochlear-implanted children.
590 $a School code: 0051.
650 4 $a Audiology. $3 537237
650 4 $a Neurosciences. $3 588700
690 $a 0300
690 $a 0317
710 2 $a University of Colorado at Boulder. $b Speech, Language and Hearing Sciences. $3 1023982
773 0 $t Dissertation Abstracts International $g 76-10B(E).
790 $a 0051
791 $a Ph.D.
792 $a 2015
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3704659