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How auditory experience differentially influences the function of left and right superior temporal cortices
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Identification of the regions involved in phonological assembly using a novel paradigm.
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In: Brain and Language, vol. 150, pp. 45-53 (2015)
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Inter- and intrahemispheric connectivity differences when reading Japanese Kanji and Hiragana.
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In: Cereb Cortex , 24 (6) pp. 1601-1608. (2014) (2014)
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Abstract:
Unlike most languages that are written using a single script, Japanese uses multiple scripts including morphographic Kanji and syllabographic Hiragana and Katakana. Here, we used functional magnetic resonance imaging with dynamic causal modeling to investigate competing theories regarding the neural processing of Kanji and Hiragana during a visual lexical decision task. First, a bilateral model investigated interhemispheric connectivity between ventral occipito-temporal (vOT) cortex and Broca's area ("pars opercularis"). We found that Kanji significantly increased the connection strength from right-to-left vOT. This is interpreted in terms of increased right vOT activity for visually complex Kanji being integrated into the left (i.e. language dominant) hemisphere. Secondly, we used a unilateral left hemisphere model to test whether Kanji and Hiragana rely preferentially on ventral and dorsal paths, respectively, that is, they have different intrahemispheric functional connectivity profiles. Consistent with this hypothesis, we found that Kanji increased connectivity within the ventral path (V1 ↔ vOT ↔ Broca's area), and that Hiragana increased connectivity within the dorsal path (V1 ↔ supramarginal gyrus ↔ Broca's area). Overall, the results illustrate how the differential processing demands of Kanji and Hiragana influence both inter- and intrahemispheric interactions.
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Keyword:
Adult; Brain; Brain Mapping; Comprehension; Computer-Assisted; dynamic causal modeling; Female; functional connectivity; Functional Laterality; Humans; Japan; Language; Language Tests; logograph; Magnetic Resonance Imaging; Male; Middle Aged; Models; Neural Pathways; Neurological; Pattern Recognition; reading; Signal Processing; Task Performance and Analysis; Visual; visual word recognition; Young Adult
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URL: http://discovery.ucl.ac.uk/1386111/
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| 4 |
Ventral occipito-temporal cortex function and anatomical connectivity in reading
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In: Doctoral thesis, UCL. (2013)
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Ventral occipito-temporal cortex function and anatomical connectivity in reading
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Twomey, T. - : UCL (University College London), 2013
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In: Doctoral thesis, UCL (University College London). (2013)
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Top-down modulation of ventral occipito-temporal responses during visual word recognition
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In: NEUROIMAGE , 55 (3) 1242 - 1251. (2011) (2011)
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Developmental dyslexia in Chinese and English populations: dissociating the effect of dyslexia from language differences
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In: Brain , 133 (6) 1694 -1706. (2010) (2010)
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| 8 |
Disproportionate language impairment in children using cochlear implants.
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In: Symplectic Elements at Oxford ; Europe PubMed Central ; PubMed (http://www.ncbi.nlm.nih.gov/pubmed/) ; Web of Science (Lite) (http://apps.webofknowledge.com/summary.do) ; Scopus (http://www.scopus.com/home.url) ; CrossRef (2008)
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