摘要
Brain computer interface (BCI) aims at creating new communication channels without depending on brain’s normal output channels of peripheral nerves and muscles. However,natural and sophisticated interactions manner between brain and computer still remain challenging. In this paper,we investigate how the duration of event-related desynchronization/synchronization (ERD/ERS) caused by motor im-agery (MI) can be modulated and used as an additional control parameter beyond simple binary deci-sions. Furthermore,using the non-time-locked properties of sustained (de)synchronization,we have developed an asynchronous BCI system for driving a car in 3D virtual reality environment (VRE) based on cumulative incremental control strategy. The extensive real time experiments confirmed that our new approach is able to drive smoothly a virtual car within challenging VRE only by the MI tasks with-out involving any muscular activities.
Brain computer interface （BCI） aims at creating new communication channels without depending on brain＇s normal output channels of peripheral nerves and muscles. However, natural and sophisticated interactions manner between brain and computer still remain challenging. In this paper, we investigate how the duration of event-related desynchronization/synchronization （ERD/ERS） caused by motor imagery （MI） can be modulated and used as an additional control parameter beyond simple binary decisions. Furthermore, using the non-time-locked properties of sustained （de）synchronization, we have developed an asynchronous BCI system for driving a car in 3D virtual reality environment （VRE） based on cumulative incremental control strategy. The extensive real time experiments confirmed that our new approach is able to drive smoothly a virtual car within challenging VRE only by the MI tasks without involving any muscular activities.
基金
Supported by the National High-Tech Research Program of China (Grant No.2006AA01Z125)
the National Basic Research Program of China (Grant No.2005CB724301)
关键词
大脑计算机界面
脑电图
去同步化
频率
brain computer interface （BCI）, electroencephalogram （EEG）, event-related desynchronization/synchronization （ERD/ERS）, common spatial frequency patterns （CSFP）, task related sustained desynchronization/synchronization （TRSD/TRSS）
