视体联合刺激双模增进作用的研究

The Bi-modal Enhancement Effect Between Visual and Somatosensory Stimulus

研究了视体单模靶刺激(V,S)与视体双模联合靶刺激(SV)条件下大脑认知作用的差异及双模增进作用的神经机制。采用64道脑电(EEG)信号采集系统,记录了14个被试在视觉、体感觉和视体联合靶刺激条件下的脑诱发电位和行为学数据,检测了单模与双模间行为学(反应时间和错误率)和ERPs(P2,P3)数据的差异,并分析了行为学与ERP数据间的相关性。通过比较视体联合靶刺激和视体单独靶刺激的行为学和ERP结果,提出视体联合刺激双模增进作用可能的神经机制。

In the present study,the cognitive difference between uni-modal（V,S） and bi-modal（SV） target stimuli were investigated from both vision and s omato sensory,and the neural mechanisms of bi-modal enhancement were also investigate d.A speeded target stimuli detection task were adopted in this experi ment, both b ehavioral and electroencephalographic responses to uni-modal and bi-modal target stimuli,which were combined from visual and somatosensory target stimuli,were recorded from 14 normal subjects using a 64-channel EEG NeuroScan system.The d ifference between uni-modal and bi-modal were tested from both behavioral（React ion time and Error rate） and ERPs（P2 and P3） data,therefore the correlation be tween behavioral and ERP data were analyzed both uni-modal and bi-modal target s timuli.By comparing the difference between uni-modal and bi-modal from both beh avioral and ERP results,the potential neural mechanism of bi-modal enhancement was determined both from vision and somatosensory.