OCULO-ENCEPHALOGRAPHIC PROCESSING

眼脑图处理

• 批准号: 3259849
• 负责人: ERICH E SUTTER
• 金额: $ 13.46万
• 依托单位: MEDICAL RESEARCH INSTITUTE OF SAN FRAN
• 依托单位国家: 美国
• 财政年份: 1983
• 资助国家: 美国
• 起止时间: 1983-12-01 至 1986-03-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/3259849
• 关键词: communication disorder aid; electroencephalography; evoked potentials; human subject; information system analysis; neural information processing; person with disability; stimulus /response; visual stimulus

This project will establish a new method of communication and environmental control by means of the visual evoked potential. Information is communicated by fixating one out of a number of flickering visual targets. The selected target is identified from the observer's evoked response which is derived from a pair of scalp electrodes. The feasibility has been proven in a preliminary study (64 targets average response time 2 seconds). The demonstrated performance is achieved by means of a novel, highly efficient technique of systems analysis. The research program is directed toward optimization of reliability and information transfer rate. It will include the study of electrode placement, target stimulus geometry (uniform fields, patterns, point sources), temporal stimulus characteristics (frame rate). The degradation of the scalp signal through muscle artifacts constitutes a major problem in practical applications. To eliminate these artifacts several techniques of nolinear filtering will be evaluated. Based on the results from these investigations, a portable system will be designed and built for evaluation of the concept outside the laboratory environment. The potential users of the communication and environmental control system are persons who are communicatively disabled through chronic conditions such as cerebral palsy, locked-in syndrome, or through progressive diseases such as amyotrophic lateral sclerosis, as well as persons in intensive care who are temporarity disabled. The Trace R and D Center for the Severely Communicatively Handicapped, at the University of Wisconsin, will evaluate the portable system with various subpopulations of users in comparative studies with other communication systems. The research program is aimed at the efficient extraction of the response contributions from several independent inputs to the visual system from the evoked response. The comparison of the extracted response contributions can not only be used for the purpose of communicaion but also for medical diagnostics. The prospect of such applications considerably widens the significance of the results from this project.

该项目将建立一种新的沟通和环境方法 通过视觉诱发电位进行控制。 信息是 通过固定多个闪烁的视觉目标中的一个来进行交流。 所选目标是根据观察者的诱发反应来识别的 来自一对头皮电极。 可行性已 经初步研究证实（64 个目标平均响应时间 2 秒）。 所展示的性能是通过新颖的、 高效的系统分析技术。 该研究计划旨在优化可靠性和 信息传输率。 它将包括电极的研究 放置、目标刺激几何形状（均匀场、图案、点 源）、时间刺激特征（帧速率）。 退化 通过肌肉伪影的头皮信号构成了一个主要问题 实际应用。 为了消除这些伪影，有几种技术 将评估非线性过滤。 根据这些结果 调查后，将设计和构建便携式系统进行评估 实验室环境之外的概念。 通信和环境控制系统的潜在用户 是因慢性病而导致沟通障碍的人 例如脑瘫、闭锁综合征或进行性疾病 例如肌萎缩侧索硬化症，以及重症监护室的人 暂时残疾的人。 重症追踪研发中心 威斯康星大学的沟通障碍者将评估 具有不同用户群体的便携式系统的比较 与其他通信系统的研究。 该研究计划旨在有效提取响应 来自视觉系统的几个独立输入的贡献 诱发反应。 提取的响应贡献的比较 不仅可以用于通讯，还可以用于医疗 诊断。 此类应用的前景大大拓宽了 该项目结果的重要性。