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    Convergent and divergent fMRI responses in children and adults to increasing language production demands

    Krishnan, Saloni and Leech, Robert and Mercure, Evelyne and Lloyd-Fox, Sarah and Dick, Frederic (2015) Convergent and divergent fMRI responses in children and adults to increasing language production demands. Cerebral Cortex 25 (10), pp. 3261-3277. ISSN 1047-3211.

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    Abstract

    In adults, patterns of neural activation associated with perhaps the most basic language skill—overt object naming—are extensively modulated by the psycholinguistic and visual complexity of the stimuli. Do children's brains react similarly when confronted with increasing processing demands, or they solve this problem in a different way? Here we scanned 37 children aged 7–13 and 19 young adults who performed a well-normed picture-naming task with 3 levels of difficulty. While neural organization for naming was largely similar in childhood and adulthood, adults had greater activation in all naming conditions over inferior temporal gyri and superior temporal gyri/supramarginal gyri. Manipulating naming complexity affected adults and children quite differently: neural activation, especially over the dorsolateral prefrontal cortex, showed complexity-dependent increases in adults, but complexity-dependent decreases in children. These represent fundamentally different responses to the linguistic and conceptual challenges of a simple naming task that makes no demands on literacy or metalinguistics. We discuss how these neural differences might result from different cognitive strategies used by adults and children during lexical retrieval/production as well as developmental changes in brain structure and functional connectivity.

    Metadata

    Item Type: Article
    Keyword(s) / Subject(s): development, fMRI, language production, task difficulty, word generation
    School: Birkbeck Schools and Departments > School of Science > Psychological Sciences
    Research Centre: Brain and Cognitive Development, Centre for (CBCD)
    Depositing User: Administrator
    Date Deposited: 09 Jun 2014 10:22
    Last Modified: 02 Dec 2016 11:18
    URI: http://eprints.bbk.ac.uk/id/eprint/9881

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