Answering questions with an electroencephalogram-based brain-computer interface
Answering questions with an electroencephalogram-based brain-computer interface
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DOI：
10.1016/s0003-9993(98)90165-4
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发表时间：
1998-09-01
影响因子：
4.3
通讯作者：
Wolpaw, JR
中科院分区：
文献类型：
--
作者：
Miner, LA;McFarland, DJ;Wolpaw, JR
目的：为了证明人类可以学会控制选定的脑电图组件，并使用该控制来回答简单的questions.Methods：四个成年人（一个患有肌萎缩侧索硬化症）学习使用脑电图（EEG）μ节律（8至12 Hz）或β节律（18至25 Hz）活动在感觉运动皮层控制垂直光标移动到目标的顶部或底部边缘的视频屏幕。在随后的课程中，目标被替换为"是“和”否“，个人使用光标回答单主题或多主题问题集中的口头”是“/”否“问题。结果：在最初的问题训练后的连续5次训练中，被试平均每分钟被问4.0 ~ 4.6个问题; 64%至87%的回答得到了RV程序的确认，93%至99%的回答是正确的。单主题和多主题问题集的表现没有显著差异。结果表明：（1）基于EEG的光标控制可以用于回答具有高度准确性的简单问题，（2）注意听觉询问和答案的形成不会干扰基于EEG的光标控制，（3）问题的复杂性（至少由单主题问题集与多主题问题集所代表的）不会明显影响表现，以及（4）RV程序如预期的那样提高了准确性。提高通信速度的几种选择似乎很有希望。基于EEG的脑机接口可以为患有严重运动障碍的人提供一种新的通信和控制方式。(C)1998年由美国康复医学大会和美国物理医学和康复学会。
Objective: To demonstrate that humans can learn to control selected electroencephalographic components and use that control to answer simple questions.Methods: Four adults (one with amyotrophic lateral sclerosis) learned to use electroencephalogram (EEG) mu rhythm (8 to 12Hz) or beta rhythm (18 to 25Hz) activity over sensorimotor cortex to control vertical cursor movement to targets at the top or bottom edge of a video screen. In subsequent sessions, the targets were replaced with the words YES and NO, and individuals used the cursor to answer spoken YES/NO questions from single- or multiple-topic question sets. They confirmed their answers through the response verification (RV) procedure, in which the word positions were switched and the question was answered again.Results: For 5 consecutive sessions after initial question training, individuals were asked an average of 4.0 to 4.6 questions per minute; 64% to 87% of their answers were confirmed by the RV procedure and 93% to 99% of these answers were correct. Performances for single- and multiple-topic question sets did not differ significantly.Conclusions: The results indicate that (1) EEG-based cursor control can be used to answer simple questions with a high degree of accuracy, (2) attention to auditory queries and formulation of answers does not interfere with EEG-based cursor control, (3) question complexity (at least as represented by single versus multiple-topic question sets) does not noticeably affect performance, and (4) the RV procedure improves accuracy as expected. Several options for increasing the speed of communication appear promising. An EEG-based brain-computer interface could provide a new communication and control modality for people with severe motor disabilities. (C) 1998 by the American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation.