Cross-modal plasticity in deaf subjects dependent on the extent of hearing loss [An article from: Cognitive Brain Research] | ![Cross-modal plasticity in deaf subjects dependent on the extent of hearing loss [An article from: Cognitive Brain Research]](http://ecx.images-amazon.com/images/I/51w5k0y0LAL._SL160_.jpg)
 enlarge | Authors: N. Lambertz, E.r. Gizewski, A. De Greiff, Forsting
Publisher: Elsevier
Category: Book
Buy New: $5.95
Format: Html
Media: Digital
ASIN: B000RR60U0
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Product Description
This digital document is a journal article from Cognitive Brain Research, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
Cross-modal plasticity in deaf subjects is still discussed controversial. We tried to figure out whether the plasticity is dependent on the extent of hearing loss. Three groups of volunteers, comprising twelve individuals each, were investigated. They were characterized by three distinctive features, one had normal hearing, the other one lost hearing and the third had only minimal residual hearing ability. All participants, except those of group one, were capable of using German Sign Language (GSL). The groups were studied with functional MRI in a standard block design during individuals' watching sign language videos alternating with black frame. During sign language conditions, deaf subjects revealed a significant activation of the auditory cortex in both hemispheres comprising Brodmann areas (BA) 42 and 22 corresponding to the secondary associative auditory areas. Additionally, activation of the angular and supramarginal gyrus was seen. Activation of the primary auditory cortex was revealed in deaf subjects with total hearing loss during sign language tasks but not in subjects with residual hearing ability. In conclusion our results indicate a cortical reorganization of the auditory cortex comprising primary auditory fields only present in subjects with total hearing loss.
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