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Lee, H.J., Truy, E., Mamou, G., Sappey-Marinier, D. and Giraud, A.L. (2007) Visual speech circuits in profound acquired deafness: A possible role for latent multimodal connectivity. Brain, 130, 2929-2941. doi:10.1093/brain/awm230

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• TITLE: Cross-modal connectivity of the secondary auditory cortex with higher visual area in the congenitally deaf—A case study

  AUTHORS: Yul-Wan Sung, Seiji Ogawa

  KEYWORDS: Deaf; Visual Language Processing;Functional MRI; Fusiform Gyrus; Auditory Cortical Areas

  JOURNAL NAME: Journal of Biomedical Science and Engineering, Vol.6 No.3A, March 29, 2013

  ABSTRACT: It is well known that auditory cortical areas are activated by visual stimulation in the deaf. However, it is not known whether the information enters from the primary visual area or high-level visual areas. In this study, we used visual language stimulation to examine visual-auditory functional connectivity. For this, we used functional magnetic resonance imaging (fMRI) in a congenitally deaf subject to localize areas in the auditory cortex that showed cross-modal reorganization for the processing of visual language inputs and estimate areas in the visual ventral stream, from which language signal inputs enter the auditory areas in the congenitally deaf. We found that the anterior region of the secondary auditory cortex in the superior temporal gyrus showed language-specific activation and that the visual inputs into the area were from the fusiform gyrus, which is a high-level visual area.