| 何庆华,吴宝明,王禾,$2,伍亚舟,石锐,程光辉.不同视觉刺激模式对视觉诱发电位的影响[J].中国康复医学杂志,2007,22(2):144~146 |
| 不同视觉刺激模式对视觉诱发电位的影响 点此下载全文 |
| 何庆华 吴宝明 王禾 $2 伍亚舟 石锐 程光辉 |
| [1]第三军医大学大坪医院野战外科研究所第五研究室,创伤、烧伤与复合伤国家重点实验室,重庆400042 [2]重庆大学计算机学院,创伤、烧伤与复合伤国家重点实验室,重庆400042 |
| 基金项目：国家自然科学基金资助项目（30300418）：重庆市自然科学基金资助项目（CSTC.2005BB2187） |
| DOI： |
| 摘要点击次数: 3567 |
| 全文下载次数: 1673 |
| 摘要： |
| 目的：通过视觉诱发电位探索适合的脑机接口视觉刺激模式。方法：采用ActiveOne生理信号测量系统和双计算机构建实验系统。利用VC＋＋语言编程，设计多种视觉刺激模式：模块闪烁方式、模块背景图案变化方式、模块字符变化方式。采用累加平均和小波滤波方法提取视觉诱发电位。结果：可以检测到多种视觉刺激模式引发的视觉诱发电位信号．不同刺激模式引发的诱发电位波形及诱出率存在差别。结论：模块闪烁、刺激模块棋盘格翻转、条纹变化、字符跳动等视觉刺激模式能引发波形幅度较大，易识别的视觉诱发电位信号，适用于脑机接口。在脑机接口应用中应提供多种视觉刺激模式供使用者选择。 |
| 关键词：脑-计算机接口 视觉诱发电位 视觉刺激 |
| Effects of different visual stimulation patterns on visual evoked potentiais Download Fulltext |
| HE Qinghua WU Baoming WANG He et al. |
| State Key Laboratory of Trauma,Bums and Combined Injury, Dept. 5,Institute of Surgery Research,Daping Hospital,Third Military Medical University,Chongqing,400042 |
| Fund Project: |
| Abstract: |
| Objective: To explore the suitable visual stimulation patterns for brain-computer interface.Method:The experimental system was established with the Active One physiological signal measurement system and two computers.Different visual stimulation patterns were designed through visual C++ programming: block flickering;change of the block background image;change of the character on the block.Visual evoked potentials were derived using averaging method and wavelet filtering.Result:Visual evoked potentials corresponding to several different stimulation patterns were detected.There are differences in the waveform and VEP detection rate due to different stimulation pattern.Conclusion:Block flickering,checkerboard flipping,stripes alternating and character moving are suitable visual stimulation patterns for brain-computer interface which can induce bigger and recognizable visual evoked potentials.There should be multiple patterns for user to choose in brain-computer interface application. |
| Keywords:brain-computer interface visual evoked potential visual stimulation |
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