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  • Visual tracking brain-compu...
    Huang, Changxing; Shi, Nanlin; Miao, Yining; Chen, Xiaogang; Wang, Yijun; Gao, Xiaorong

    iScience, 04/2024, Volume: 27, Issue: 4
    Journal Article

    Brain-computer interfaces (BCIs) offer a way to interact with computers without relying on physical movements. Non-invasive electroencephalography-based visual BCIs, known for efficient speed and calibration ease, face limitations in continuous tasks due to discrete stimulus design and decoding methods. To achieve continuous control, we implemented a novel spatial encoding stimulus paradigm and devised a corresponding projection method to enable continuous modulation of decoded velocity. Subsequently, we conducted experiments involving 17 participants and achieved Fitt’s information transfer rate (ITR) of 0.55 bps for the fixed tracking task and 0.37 bps for the random tracking task. The proposed BCI with a high Fitt’s ITR was then integrated into two applications, including painting and gaming. In conclusion, this study proposed a visual BCI based-control method to go beyond discrete commands, allowing natural continuous control based on neural activity. Display omitted •Advancement in visual BCI toward natural and efficient interaction•Novel spatial encoding stimulus paradigm and decoding methods for continuous control•High performance in visual tracking tasks•Promised real-world applicability Biological sciences; Applied sciences; Bioengineering