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1.
Chinese Journal of Surgery ; (12): 1021-1024, 2013.
Artículo en Chino | WPRIM | ID: wpr-314770

RESUMEN

<p><b>OBJECTIVE</b>To discuss the distribution characteristics of language areas in Chinese-English non-fluent late bilinguals.</p><p><b>METHODS</b>Six Chinese-English bilinguals with eloquent tumors underwent awake-surgeries. The activated areas of BOLD-fMRI were obtained as the patients performed pure naming, verb generation, and abstract/concrete judgment tasks. Direct cortical stimulation(DCS) as the golden standard of language mapping were performed during awake-surgeries on the exposed cortical areas. BOLD-fMRI results of 3 language tasks were compared with DCS results. The statistical method was McNemer.</p><p><b>RESULTS</b>Sixteen positive sites(22.5%) were comfirmed out of 71 stimulations. There were 3 specific language sites, in which 2 sites were specific English sites and 1 site was specific Chinese site. When activated areas of BOLD-fMRI were compared with the DCS results, verb generation task had the highest concordance rate 40.9% (95%CI:30.2%-52.5%) . There were significant differences between the results of BOLD-fMRI and DCS of all 3 bilingual tasks(P < 0.017).</p><p><b>CONCLUSIONS</b>There are specific language areas in Chinese-English non-fluent late bilinguals. The BOLD-fMRI language mapping could not substitute DCS in the context of mapping language areas in bilinguals.</p>


Asunto(s)
Adulto , Femenino , Humanos , Masculino , Adulto Joven , Mapeo Encefálico , Neoplasias Encefálicas , Cirugía General , Corteza Cerebral , Fisiología , Imagen por Resonancia Magnética , Multilingüismo
2.
Acta Physiologica Sinica ; (6): 319-324, 2011.
Artículo en Chino | WPRIM | ID: wpr-335984

RESUMEN

To investigate the neuronal mechanism of retrieval of long-term digital memory in healthy volunteers, functional magnetic resonance imaging (fMRI) technique was used in the study. Twenty-two right-handed volunteers were subjected to a long-term digital memory test with block-design. The memory task and control task were adopted in the experiment alternatively. The fMRI data were recorded by a Siemens 1.5T MR machine and analyzed by SPM99. The activated brain regions were shown in the Talairach coordinate. The results showed that the Brodmann's area (BA) 9 region in left middle frontal gyrus was the most activated cortex during the long-term digital memory task. The left medial frontal gyrus, left inferior frontal gyrus, right inferior frontal gyrus, cingulate gyrus, left inferior parietal lobule, left superior parietal lobule, right superior parietal lobule, right middle temporal gyrus, left lingual gyrus, left middle occipital gyrus, right middle brain, cerebellum and right caudate nucleus tail were also involved. The activation in cortices showed obvious left predominance. It is suggested that a series of brain regions with left predominance are involved in long-term digital memory. Left lateral frontal cortex would be the most important structure for information extraction, while the other cortices and their connections may be important for processing and long-term storage of digital information.


Asunto(s)
Adolescente , Femenino , Humanos , Masculino , Adulto Joven , Encéfalo , Fisiología , Procesamiento de Imagen Asistido por Computador , Imagen por Resonancia Magnética , Memoria a Largo Plazo , Fisiología , Lóbulo Parietal , Fisiología
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