Integrating simultaneous motor imagery and spatial attention for EEG-BCI control

脑-机接口 运动表象 脑电图 感觉运动节律 物理医学与康复 计算机科学 人口 医学 心理学 神经科学 环境卫生
作者
Dylan Forenzo,Yixuan Liu,Jeehyun Kim,Yidan Ding,Taehyung Yoon,Bin He
标识
DOI:10.1101/2023.02.20.529307
摘要

EEG-based brain-computer interfaces (BCI) are non-invasive approaches for replacing or restoring motor functions in impaired patients, and direct brain-to-device communication in the general population. Motor imagery (MI) is one of the most used BCI paradigms, but its performance varies across individuals and certain users require substantial training to develop control. In this study, we propose to integrate a MI paradigm simultaneously with a recently proposed Overt Spatial Attention (OSA) paradigm, to accomplish BCI control.We evaluated a cohort of 25 human subjects' ability to control a virtual cursor in one- and two-dimensions over 5 BCI sessions. The subjects used 5 different BCI paradigms: MI alone, OSA alone, MI and OSA simultaneously towards the same target (MI+OSA), and MI for one axis while OSA controls the other (MI/OSA and OSA/MI).Our results show that MI+OSA reached the highest average online performance in 2D tasks at 49% Percent Valid Correct (PVC), statistically outperforms MI alone (42%), and was higher, but not statistically significant, than OSA alone (45%). MI+OSA had a similar performance to each subject's best individual method between MI alone and OSA alone (50%) and 9 subjects reached their highest average BCI performance using MI+OSA.Integrating MI and OSA leads to improved performance over MI alone at the group level and is the best BCI paradigm option for some subjects.This work proposes a new BCI control paradigm that integrates two existing paradigms and demonstrates its value by showing that it can improve users' BCI performance.
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