视体联合刺激双模增进作用的研究

摘要

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 somatosensory, and the neural mechanisms of bi - modal enhancement were also investigated. A speeded target stimuli detection task were adopted in this experiment, both behavioral and electroencephalographic responses io uni - modal and hi - modal target stimuli, which were combined from visual and somatosensory target stimuli, were recorded from 14 normal subjects using a 64 - channel EEC NeuroScan system. The difference between uni- modal and bi- modal were tested from both behavioral (Reaction time and Error rate) and ERPs (P2 and P3) data, therefore the correlation between behavioral and ERF data were analyzed both uni - modal and bi - modal target stimuli. By comparing the difference between uni - modal and bi - modal from both behavioral and ERP results, the potential neural mechanism of bi - modal enhancement was determined both from vision and somatosensory.