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    Areas activated during naturalistic reading comprehension overlap topological visual, auditory, and somatotomotor maps

    Sood, M.R. and Sereno, Martin I. (2016) Areas activated during naturalistic reading comprehension overlap topological visual, auditory, and somatotomotor maps. Human Brain Mapping 37 (8), pp. 2784-2810. ISSN 1065-9471.

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    Abstract

    Cortical mapping techniques using fMRI have been instrumental in identifying the boundaries of topological (neighbor-preserving) maps in early sensory areas. The presence of topological maps beyond early sensory areas raises the possibility that they might play a significant role in other cognitive systems, and that topological mapping might help to delineate areas involved in higher cognitive processes. In this study, we combine surface-based visual, auditory, and somatomotor mapping methods with a naturalistic reading comprehension task in the same group of subjects to provide a qualitative and quantitative assessment of the cortical overlap between sensory-motor maps in all major sensory modalities, and reading processing regions. Our results suggest that cortical activation during naturalistic reading comprehension overlaps more extensively with topological sensory-motor maps than has been heretofore appreciated. Reading activation in regions adjacent to occipital lobe and inferior parietal lobe almost completely overlaps visual maps, whereas a significant portion of frontal activation for reading in dorsolateral and ventral prefrontal cortex overlaps both visual and auditory maps. Even classical language regions in superior temporal cortex are partially overlapped by topological visual and auditory maps. By contrast, the main overlap with somatomotor maps is restricted to a small region on the anterior bank of the central sulcus near the border between the face and hand representations of M-I.

    Metadata

    Item Type: Article
    Keyword(s) / Subject(s): cortical surface-based analysis, fMRI phase-encoded analysis, fMRI univariate analysis, reading comprehension, retinotopic mapping, tonotopic mapping, somatomotor mapping
    School: Birkbeck Schools and Departments > School of Science > Psychological Sciences
    Depositing User: Administrator
    Date Deposited: 16 May 2016 15:25
    Last Modified: 22 May 2017 13:04
    URI: http://eprints.bbk.ac.uk/id/eprint/15185

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