Journal of Korean Neurosurgical Society

  • 제45권4호
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  • Pages.219-223
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  • 2009
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  • 2005-3711(pISSN)
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  • 1598-7876(eISSN)
대한신경외과학회 (The Korean Neurosurgical Society)
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Localization of Broca's Area Using Functional MR Imaging: Quantitative Evaluation of Paradigms

  • Kim, Chi-Heon (Department of Neurosurgery, Seoul National University Hospital) ;
  • Kim, Jae-Hun (Department of Biomedical Engineering, Hanyang University) ;
  • Chung, Chun-Kee (Department of Neurosurgery, Seoul National University Hospital) ;
  • Kim, June-Sic (Department of Neurosurgery, Seoul National University Hospital) ;
  • Lee, Jong-Min (Department of Biomedical Engineering, Hanyang University) ;
  • Lee, Sang-Kun (Department of Neurology, Seoul National University Hospital)
  • 발행 : 2009.04.28
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초록

Objective : Functional magnetic resonance imaging (fMRI) is frequently used to localize language areas in a non-invasive manner. Various paradigms for presurgical localization of language areas have been developed, but a systematic quantitative evaluation of the efficiency of those paradigms has not been performed. In the present study, the authors analyzed different language paradigms to see which paradigm is most efficient in localizing frontal language areas. Methods : Five men and five women with no neurological deficits participated (mean age, 24 years) in this study. All volunteers were right-handed. Each subject performed 4 tasks, including fixation (Fix), sentence reading (SRI. pseudoword reading (PR), and word generation (WG). Fixation and pseudoword reading were used as contrasts. The functional area was defined as the area(s) with a t-value of more than 3.92 in fMRI with different tasks. To apply an anatomical constraint, we used a brain atlas mapping system, which is available in AFNI, to define the anatomical frontal language area. The numbers of voxels in overlapped area between anatomical and functional area were individually counted in the frontal expressive language area. Results : Of the various combinations, the word generation task was most effective in delineating the frontal expressive language area when fixation was used as a contrast (p<0.05). The sensitivity of this test for localizing Broca's area was 81 % and specificity was 70%. Conclusion : Word generation versus fixation could effectively and reliably delineate the frontal language area. A customized effective paradigm should be analyzed in order to evaluate various language functions.

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참고문헌

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  2. Foreign accent syndrome: A multimodal mapping study vol.49, pp.1, 2013, https://doi.org/10.1016/j.cortex.2011.10.007
  3. White Matter Change Revealed by Diffusion Tensor Imaging in Gliomas vol.4, pp.2, 2009, https://doi.org/10.14791/btrt.2016.4.2.100