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Intrinsically organized network for word processing during the resting state

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机构: [1]Capital Med Univ, Dept Radiol, Beijing Tiantan Hosp, Beijing Neurosurg Inst, Beijing 100050, Peoples R China; [2]Xidian Univ, Life Sci Res Ctr, Sch Life Sci & Technol, Xian 710071, Peoples R China; [3]Beijing Jiaotong Univ, Sch Comp & Informat Technol, Beijing 100044, Peoples R China; [4]Chinese Acad Sci, Inst Automat, Beijing 100190, Peoples R China; [5]Univ Calif San Diego, Dept Psychol, San Diego, CA 92103 USA; [6]Univ Toronto, Inst Child Study, Toronto, ON M5R 2X2, Canada
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关键词: Resting state Word processing Visual word form area (VWFA) Chinese character processing Intrinsic functional connectivity

摘要:
Neural mechanisms underlying word processing have been extensively studied. It has been revealed that when individuals are engaged in active word processing, a complex network of cortical regions is activated. However, it is entirely unknown whether the word-processing regions are intrinsically organized without any explicit processing tasks during the resting state. The present study investigated the intrinsic functional connectivity between word-processing regions during the resting state with the use of fMRI methodology. The low-frequency fluctuations were observed between the left middle fusiform gyrus and a number of cortical regions. They included the left angular gyrus, left supramarginal gyrus, bilateral pars opercularis, and left pars triangularis of the inferior frontal gyrus, which have been implicated in phonological and semantic processing. Additionally, the activations were also observed in the bilateral superior parietal lobule and dorsal lateral prefrontal cortex, which have been suggested to provide top-down monitoring on the visual-spatial processing of words. The findings of our study indicate an intrinsically organized network during the resting state that likely prepares the visual system to anticipate the highly probable word input for ready and effective processing. (C) 2010 Elsevier Ireland Ltd. All rights reserved.

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出版当年[2010]版:
大类 | 4 区 医学
小类 | 4 区 神经科学
最新[2025]版:
大类 | 4 区 医学
小类 | 4 区 神经科学
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出版当年[2009]版:
Q3 NEUROSCIENCES
最新[2024]版:
Q4 NEUROSCIENCES

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第一作者机构: [2]Xidian Univ, Life Sci Res Ctr, Sch Life Sci & Technol, Xian 710071, Peoples R China;
通讯作者:
通讯机构: [1]Capital Med Univ, Dept Radiol, Beijing Tiantan Hosp, Beijing Neurosurg Inst, Beijing 100050, Peoples R China;
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