中华行为医学与脑科学杂志
中華行為醫學與腦科學雜誌
중화행위의학여뇌과학잡지
CHINESE JOURNAL OF BEHAVIORAL MEDICINE AND BRAIN SCIENCE
2010年
4期
334-337
,共4页
黄旭%静进%叶滨宾%张志鹏%王梦龙%杨文翰
黃旭%靜進%葉濱賓%張誌鵬%王夢龍%楊文翰
황욱%정진%협빈빈%장지붕%왕몽룡%양문한
功能性磁共振成像%儿童%阅读%汉语
功能性磁共振成像%兒童%閱讀%漢語
공능성자공진성상%인동%열독%한어
fMRI%Children%Reading%Chinese
目的 探索对汉字部件空间信息进行分析的特殊脑区,探讨视觉空间辨别能力与汉字部首的辨别之间的关系,为进一步探讨汉语阅读障碍的神经机制提供依据.方法 选择广州市某小学四、五年级正常健康学龄9名(男7例,女2例)为研究对象,年龄10~11岁,母语为汉语,右利手.使用Siemens 3.0 T磁共振扫描仪,采用单次激发平面回波扫描序列和组块设计的刺激模式,采用图形开口方向辨别和汉字部首辨别任务,对被试进行脑功能磁共振扫描,采集全脑的fMRI数据.使用SPM2软件包进行数据处理,分别获得2种任务刺激和对照刺激对比的脑激活图.结果 被试在2个实验任务中的反应时均比对照反应时要长,差异有显著性[(879±127)ms,(805±124)ms,P=0.029;(917±144)ms,(750±101)ms,P<0.01];对照与任务的反应正确率差异无显著性[(96±5)%,(95±8)%,P=0.515;(89±10)%,(96±6)%,P=0.130].在完成图形开口方向辨别任务时,被试双侧顶下回、右侧顶上回、右侧楔前叶及枕叶皮层出现激活.在完成汉字部首辨别任务时,被试左侧楔前叶、左侧顶上回、右侧中央前回、右侧额下回、左侧海马、右侧丘脑、右侧尾状核及枕叶的多个皮层出现激活.结论 右侧大脑半球为图形开口方向辨别的优势半球,左侧大脑半球为汉字部首辨别的优势半球,汉字偏旁的辨别与图形开口方向的辨别之间存在部分类似的机制,视觉空间方向的辨别能力可能是汉字部首辨别所需的一种基本能力.
目的 探索對漢字部件空間信息進行分析的特殊腦區,探討視覺空間辨彆能力與漢字部首的辨彆之間的關繫,為進一步探討漢語閱讀障礙的神經機製提供依據.方法 選擇廣州市某小學四、五年級正常健康學齡9名(男7例,女2例)為研究對象,年齡10~11歲,母語為漢語,右利手.使用Siemens 3.0 T磁共振掃描儀,採用單次激髮平麵迴波掃描序列和組塊設計的刺激模式,採用圖形開口方嚮辨彆和漢字部首辨彆任務,對被試進行腦功能磁共振掃描,採集全腦的fMRI數據.使用SPM2軟件包進行數據處理,分彆穫得2種任務刺激和對照刺激對比的腦激活圖.結果 被試在2箇實驗任務中的反應時均比對照反應時要長,差異有顯著性[(879±127)ms,(805±124)ms,P=0.029;(917±144)ms,(750±101)ms,P<0.01];對照與任務的反應正確率差異無顯著性[(96±5)%,(95±8)%,P=0.515;(89±10)%,(96±6)%,P=0.130].在完成圖形開口方嚮辨彆任務時,被試雙側頂下迴、右側頂上迴、右側楔前葉及枕葉皮層齣現激活.在完成漢字部首辨彆任務時,被試左側楔前葉、左側頂上迴、右側中央前迴、右側額下迴、左側海馬、右側丘腦、右側尾狀覈及枕葉的多箇皮層齣現激活.結論 右側大腦半毬為圖形開口方嚮辨彆的優勢半毬,左側大腦半毬為漢字部首辨彆的優勢半毬,漢字偏徬的辨彆與圖形開口方嚮的辨彆之間存在部分類似的機製,視覺空間方嚮的辨彆能力可能是漢字部首辨彆所需的一種基本能力.
목적 탐색대한자부건공간신식진행분석적특수뇌구,탐토시각공간변별능력여한자부수적변별지간적관계,위진일보탐토한어열독장애적신경궤제제공의거.방법 선택엄주시모소학사、오년급정상건강학령9명(남7례,녀2례)위연구대상,년령10~11세,모어위한어,우리수.사용Siemens 3.0 T자공진소묘의,채용단차격발평면회파소묘서렬화조괴설계적자격모식,채용도형개구방향변별화한자부수변별임무,대피시진행뇌공능자공진소묘,채집전뇌적fMRI수거.사용SPM2연건포진행수거처리,분별획득2충임무자격화대조자격대비적뇌격활도.결과 피시재2개실험임무중적반응시균비대조반응시요장,차이유현저성[(879±127)ms,(805±124)ms,P=0.029;(917±144)ms,(750±101)ms,P<0.01];대조여임무적반응정학솔차이무현저성[(96±5)%,(95±8)%,P=0.515;(89±10)%,(96±6)%,P=0.130].재완성도형개구방향변별임무시,피시쌍측정하회、우측정상회、우측설전협급침협피층출현격활.재완성한자부수변별임무시,피시좌측설전협、좌측정상회、우측중앙전회、우측액하회、좌측해마、우측구뇌、우측미상핵급침협적다개피층출현격활.결론 우측대뇌반구위도형개구방향변별적우세반구,좌측대뇌반구위한자부수변별적우세반구,한자편방적변별여도형개구방향적변별지간존재부분유사적궤제,시각공간방향적변별능력가능시한자부수변별소수적일충기본능력.
Objective To explore the specific brain regions involved in Chinese character radicals visualspatial processing,as well as to explore the relationship between visual-spatial identification and Chinese characters radicals identification.To provide an evidence for understanding the underlying neural mechanism of developmental dyslexic.Methods Twelve healthy Chinese fourth and fifth grade children(7 boys and 2 girls,aged from 10 to 11 years old)were chosen from a primary school in Guangzhou.The children were native Chinese speakers and right handed.The subjects participated in two fMRI experiments on a 3.0 T Siemens MR scanner.Two separate block-designed cognitive tasks were devised,one was figure directions judgement task and the other was Chinese characters radical identification task.A single-shot GE-EPI scan sequence were used for fMRI scans.The BOLD fMRI data were collected and were preprocessed and analyzed in SPM2.Results The subjects had longer reaction time during the two experiments tasks than in control states((879±127)ms vs(805±124)ms,P=0.029;(917±144)ms vs(750±101)ms,P<0.01),and had same response accuracy in both tasks and control states((96±5)% vs(95±8)%,P=0.515;(89±10)% vs(96±6)%,P=0.130).In figure direction judgement experiment,activations were found in bilateral occipital,right superior parietal,right precuneus and right middle frontal cortices.However,different and more extensive regions including left superior parietal,left precuneus,left hippocampus,right thalamus,right caudate cortices and bilateral occipital cortices were involved in identifying the radicals of Chinese characters.Conclusion Right hemisphere was dominant in judging the figure direction,and left hemisphere is dominant in identifying radicals of Chinese characters.These fMRI results show light on underlying partial similar neurophysiological mechanism between judging figure directions and identifying Chinese character radicals.The visual-spatial ability may be essential for Chinese character radical identification.