A New Design of the Asynchronous Brain Computer Interface Using the Knowledge of the Path of Features

Conference Proceedings. 2nd International IEEE EMBS Conference on Neural Engineering, 2005. Pub Date : 2005-03-16 DOI:10.1109/CNE.2005.1419563

A. Bashashati, R. Ward, G. Birch

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引用次数: 16

Abstract

The low-frequency asynchronous switch design (LF-ASD) was introduced as a direct brain computer interface (BCI) technology for asynchronous control applications. The LF-ASD has the advantage that it is operational at any time and not only at specific defined periods. It is activated only when a user intends control, otherwise it maintains an inactive state output. The intended control results from a certain movement attempt such as finger flexion. This paper presents the evaluation of a modified LF-ASD design with data collected from individuals with high-level spinal cord injuries and able-bodied subjects. The modifications are related to incorporating into the system more knowledge about the movement attempt. Specifically, the past values of the features extracted from the EEG signal related to the movement attempts are used. The error characteristics of this new asynchronous brain switch design are significantly better than the previous LF-ASD design, with true positive rate increases of approximately 8.5% for false positive rates in the range of 1-2%

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基于特征路径知识的异步脑机接口设计

低频异步开关设计(LF-ASD)是一种用于异步控制应用的直接脑机接口(BCI)技术。LF-ASD的优点是它可以在任何时间运行，而不仅仅是在特定的时间段。它仅在用户想要控制时才被激活，否则它将保持非活动状态输出。预期的控制来自于某种动作的尝试，比如手指的弯曲。本文介绍了一种改进的LF-ASD设计的评估，收集了来自高水平脊髓损伤个体和健全受试者的数据。这些修改与将更多关于运动尝试的知识纳入系统有关。具体来说，利用从脑电信号中提取的与运动尝试相关的特征的过去值。这种新的异步脑开关设计的误差特性明显优于先前的LF-ASD设计，在1-2%的假阳性率范围内，真阳性率提高了约8.5%

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Conference Proceedings. 2nd International IEEE EMBS Conference on Neural Engineering, 2005.

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