利用多媒体微机实现诱发电位仪视听复合模式刺激的同步触发

目的和方法复合模式事件相关电位（ＣＥＲＰ）是人在处理两种或两种以上感觉刺激时，由头皮记录到的电位变化。与单一模式事件相关电位（ＳＥＲＰ）相比，ＣＥＲＰ更准确地反映了真实情况下人的认知加工，便于利用更复杂的知觉模型进行ＥＲＰ研究，具有重要的理论意义和应用价值。本研究分两部分，第一部分：利用多媒体技术开发、实现了ＳＥＲＰ和ＣＥＲＰ的记录。第二部分：在此基础上完成了视听觉多模式刺激事件相关电位的初步实验研究。结果解决了刺激呈现时间的精确控制和外接诱发电位仪的同步触发等关键性问题；记录出了经典的视、听觉ＳＥＲＰ和ＣＥＲＰ，且ＳＥＲＰ的结果与既往文献报告相符，达到了设计要求。

Synchronizd visual and auditory stimuli triggering evoked potential equipment using multimedia PC

Objective and methods Crossmodal event-related potential (CERP) is the potentials recorded from the scalp of the subjects when a or more different sensory stimuli were given, compared with single-modal ERP (SERP), which uses the same sensory stimuli. CERP is able to reflect the cognitive processing ability of the subjects more accurately, and therefore can facilitate the FRP research. while more complicated cognitive processing events are encountered. In this research, two sessions are included: Session it The SERP and CERP was recorded using multimedia technology. Session II: On the basis of Part I, further research experiments of CERP using visual and auditory stimuli are accomplished. Results Using synchronous triggering extension EP workstation with high time precision. the recording of the typical visual or auditory SERP and CERP were successfully accomplished. The results of visual and auditory SERP were recorded with printed sheets. In brief, this system fulfilled the desired goal.