This paper presents a new asynchronous hybrid brain-computer interface (BCI) system that integrates a speller, a web browser, an e-mail client, and a file explorer using electroencephalographic (EEG) and electrooculography (EOG) signals. More specifically, an EOG-based button selection method, which requires the user to blink his/her eyes synchronously with the target button’s flashes during button selection, is first presented. Next, we propose a mouse control method by combining EEG and EOG signals, in which the left-/right-hand motor imagery (MI)-related EEG is used to control the horizontal movement of the mouse and the blink-related EOG is used to control the vertical movement of the mouse and to select/reject a target. These two methods are further combined to develop the integrated hybrid BCI system. With the hybrid BCI, users can input text, access the internet, communicate with others via e-mail, and manage files in their computer using only EEG and EOG without any body movements. Ten healthy subjects participated in a comprehensive online experiment, and superior performance was achieved compared with our previously developed P300- and MI-based BCI and some other asynchronous BCIs, therefore demonstrating the system’s effectiveness.

中文翻译：

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基于 EEG 和 EOG 的异步混合 BCI：集成拼写器、Web 浏览器、电子邮件客户端和文件资源管理器的系统


本文提出了一种新型异步混合脑机接口（BCI）系统，该系统使用脑电图（EEG）和眼电图（EOG）信号集成了拼写器、网络浏览器、电子邮件客户端和文件浏览器。更具体地，首先提出了一种基于EOG的按钮选择方法，该方法要求用户在选择按钮时与目标按钮的闪烁同步地眨眼。接下来，我们提出了一种结合脑电图和眼电图信号的鼠标控制方法，其中左/右手运动想象（MI）相关的脑电图用于控制鼠标的水平移动，并且使用眨眼相关的眼电图控制鼠标的垂直移动并选择/拒绝目标。这两种方法进一步结合起来开发集成的混合BCI系统。借助混合脑机接口，用户只需使用脑电图和眼电图即可输入文本、访问互联网、通过电子邮件与他人交流以及管理计算机中的文件，而无需任何身体动作。十名健康受试者参与了全面的在线实验，与我们之前开发的基于 P300 和 MI 的 BCI 以及其他一些异步 BCI 相比，取得了优异的性能，从而证明了系统的有效性。