面部表情识别任务脑活动性别差异的fMRI研究

目的检测与面部表情识别相关脑区的激活部位及特点,分析其性别间差异。资料与方法采用GE1.5 T磁共振扫描仪对22名健康志愿者(男\女各11名,年龄26～37岁)行磁共振功能成像(functional magneticresonance imaging,fMRI),实验任务为事件相关设计的负性、正性及中性面部表情图片识别。采用SPM5软件进行fMRI数据预处理和统计分析。观察有统计学意义的体素所在的脑区及其MNI坐标,记录激活区的激活强度。并记录志愿者执行任务的反应时间和正确率。结果男性志愿者的反应时间明显快于女性(P<0.05);判断正确率无性别间差异(P>0.05)。识别正性表情时,女性相对于男性(女-男)激活增加的脑区包括左侧前额皮层背外侧(BA11)、两侧顶下小叶(BA39、40)、左侧颞下回(BA38)和右小脑;男性相对于女性(男-女)激活增加的脑区包括右侧前额皮层外侧面(BA6、10、44)、两侧楔前叶(BA7、19)、左侧颞上回(BA42)、两扣带回后部(BA24、30)、左海马旁回(BA30)、两小脑后叶和左尾状核。识别负性表情刺激时,女性相对于男性(女-男)激活增加的脑区包括两侧前额皮层背外侧...

Gender Differences in Recognition of Facial Expression:A fMRI Study

Objective To detect brain areas related to facial emotion recognition tasks,and to analyze the differences of activated areas between female and male subjects.Materials and Methods Twenty two healthy volunteers(11 men,11 women,aged 26 to 37 years) were included in this study.Functional MRI data was accepted by Using GE 1.5T MR scanner.Experimental task was facial expression recognition,colorized negative,positive,neutral facial expression pictures were adopted in this study.SPM5 software was used to process...