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
2012年
4期
360-362
,共3页
赵艳杰%周曙%赵云肖%黄金君
趙豔傑%週曙%趙雲肖%黃金君
조염걸%주서%조운초%황금군
视觉搜索%视觉注意%注意网络%事件相关电位
視覺搜索%視覺註意%註意網絡%事件相關電位
시각수색%시각주의%주의망락%사건상관전위
Visual search%Visual attention%Attention network%Event-related potential
目的 利用事件相关电位(ERP)时空模式探讨视觉突出性目标加工的神经机制.方法 16名受试者执行视觉搜索任务,按键判定4个项目中是否存在1个目标,其中目标和1个分心物可能具备颜色突出性.行为绩效和ERP数据应用2(分心物突出性:有、无)×3(目标:缺失、低突出性、高突出性)双因素重复测量方差分析.结果 反应时间交互效应显著(F(1.99,29.79)=21.56,P=0.00).低突出性目标的搜索反应时间在分心物突出性存在[ (552.57 ±82.32) ms]和缺乏[(540.47±75.68)ms]条件下差异显著(t(15)=-2.489,P=0.025).高突出性目标的搜索反应时间在分心物突出性存在[(527.14±77.84) ms]和缺乏[(527.77±78.31)ms]条件下无显著差异(l(15)=0.162,P=0.873).ERP的F值统计参数映像提示:在知觉阶段(350 ～450 ms),分心物和目标的突出性效应分别出现在处理刺激新奇性的右额顶颞区和视觉加工相关的顶枕区,两者的交互效应存在于刺激熟悉性加工及分类相关的左颞区(450～ 600 ms).结论 高突出性目标的迅捷加工得益于早期其与分心物的并行处理以及后期左颞区熟悉性网络对其的有效分类.
目的 利用事件相關電位(ERP)時空模式探討視覺突齣性目標加工的神經機製.方法 16名受試者執行視覺搜索任務,按鍵判定4箇項目中是否存在1箇目標,其中目標和1箇分心物可能具備顏色突齣性.行為績效和ERP數據應用2(分心物突齣性:有、無)×3(目標:缺失、低突齣性、高突齣性)雙因素重複測量方差分析.結果 反應時間交互效應顯著(F(1.99,29.79)=21.56,P=0.00).低突齣性目標的搜索反應時間在分心物突齣性存在[ (552.57 ±82.32) ms]和缺乏[(540.47±75.68)ms]條件下差異顯著(t(15)=-2.489,P=0.025).高突齣性目標的搜索反應時間在分心物突齣性存在[(527.14±77.84) ms]和缺乏[(527.77±78.31)ms]條件下無顯著差異(l(15)=0.162,P=0.873).ERP的F值統計參數映像提示:在知覺階段(350 ～450 ms),分心物和目標的突齣性效應分彆齣現在處理刺激新奇性的右額頂顳區和視覺加工相關的頂枕區,兩者的交互效應存在于刺激熟悉性加工及分類相關的左顳區(450～ 600 ms).結論 高突齣性目標的迅捷加工得益于早期其與分心物的併行處理以及後期左顳區熟悉性網絡對其的有效分類.
목적 이용사건상관전위(ERP)시공모식탐토시각돌출성목표가공적신경궤제.방법 16명수시자집행시각수색임무,안건판정4개항목중시부존재1개목표,기중목표화1개분심물가능구비안색돌출성.행위적효화ERP수거응용2(분심물돌출성:유、무)×3(목표:결실、저돌출성、고돌출성)쌍인소중복측량방차분석.결과 반응시간교호효응현저(F(1.99,29.79)=21.56,P=0.00).저돌출성목표적수색반응시간재분심물돌출성존재[ (552.57 ±82.32) ms]화결핍[(540.47±75.68)ms]조건하차이현저(t(15)=-2.489,P=0.025).고돌출성목표적수색반응시간재분심물돌출성존재[(527.14±77.84) ms]화결핍[(527.77±78.31)ms]조건하무현저차이(l(15)=0.162,P=0.873).ERP적F치통계삼수영상제시:재지각계단(350 ～450 ms),분심물화목표적돌출성효응분별출현재처리자격신기성적우액정섭구화시각가공상관적정침구,량자적교호효응존재우자격숙실성가공급분류상관적좌섭구(450～ 600 ms).결론 고돌출성목표적신첩가공득익우조기기여분심물적병행처리이급후기좌섭구숙실성망락대기적유효분류.
Objective To investigate the neural mechanism of processing the salient target during the visual search task with spatiotemporal patterns of event-related potential(ERP).Methods Sixteen subjects were asked to judge the existence of a low or high salient target from 4 items,in which one distractor might be also salient or not.A two-way repeated-measure ANOVA was carried out for behavioral performance and ERP data( distractor saliency:YES,NO) * ( target:none,low salient,high salient).Results Significant interaction was found between target and distractor for the reaction time (F( 1.99,29.79) =21.56,P=0.00).For the low salient target,significant difference of reaction time was found between the YES (552.57 ± 82.32 ms) and NO (540.47 ± 75.68 ms)of distractor saliency( t (15) =- 2.489,P =0.025 ).However,such difference of reaction time was not significant for the high salient target.The statistical parametric mapping of F-value of ERP suggested the effect of the distractor saliency revealed in the right fronto-parietal-temporal areas related to stimulus novelty and the effect of the target saliency appeared in the parietal-occipital regions related to visual processing during the same stage ( 350 ～ 450ms ).The significant interaction occurred in the left temporal regions (450 ～ 600 ms ) related to stimulus familiarity and its classification.Conclusion Due to both mechanisms of the parallel processing for the target and the distractor during the perceptual stage and the effective classification of the familiar network within left hemisphere during the stage of pattern classification,the salient target can be processed quickly in spite of the interference from the salient distractor.
