Combining Motor Imagery With Selective Sensation Toward a Hybrid-Modality BCI
Combining Motor Imagery With Selective Sensation Toward a Hybrid-Modality BCI
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DOI：
10.1109/tbme.2013.2287245
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发表时间：
2014-08
影响因子：
4.6
通讯作者：
Lin Yao;Jianjun Meng;Dingguo Zhang;X. Sheng;Xiangyang Zhu
中科院分区：
文献类型：
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作者：
Lin Yao;Jianjun Meng;Dingguo Zhang;X. Sheng;Xiangyang Zhu
本文提出了一种混合模态脑机接口（BCI），将运动意象与选择性感觉相结合，增强对左右心理任务的区分，如左/右刺激感觉和左右运动意象的分类。在这个范例中，可穿戴的振动触觉环被用来刺激两个手腕上的皮肤。受试者被要求根据随机呈现的提示（即左手运动意象、右手运动意象、左刺激感觉或右刺激感觉）完成心理任务。双因素方差分析显示，组效应显著（F (2,20) = 7.17, p = 0.0045），经benferroni校正多重比较检验（α = 0.05），混合模态组比运动意象组平均高11.13%，比选择性感觉组平均高10.45%。混合模态实验显示了潜在的更广泛的使用范围，10个被试的准确率超过70%，其次是4个被试的运动意象和5个被试的选择感觉。与运动意象和选择性感觉相比，6名受试者在混合模式上表现出统计学上显著的改善（benferroni校正）。此外，在运动意象和选择性感觉都有困难的受试者中，混合模式将他们的表现提高到90%的准确率。提议的混合模式脑机接口已经证明了对那些表现不佳的脑机接口用户的明显好处。在这种混合模式中，运动和感觉预期的需求不仅提供了脑机接口沟通和控制的基本功能，而且还具有增强运动恢复过程中康复的潜力。
A hybrid modality brain-computer interface (BCI) is proposed in this paper, which combines motor imagery with selective sensation to enhance the discrimination between left and right mental tasks, e.g., the classification between left/ right stimulation sensation and right/ left motor imagery. In this paradigm, wearable vibrotactile rings are used to stimulate both the skin on both wrists. Subjects are required to perform the mental tasks according to the randomly presented cues (i.e., left hand motor imagery, right hand motor imagery, left stimulation sensation or right stimulation sensation). Two-way ANOVA statistical analysis showed a significant group effect (F (2,20) = 7.17, p = 0.0045), and the Benferroni-corrected multiple comparison test (with α = 0.05) showed that the hybrid modality group is 11.13% higher on average than the motor imagery group, and 10.45% higher than the selective sensation group. The hybrid modality experiment exhibits potentially wider spread usage within ten subjects crossed 70% accuracy, followed by four subjects in motor imagery and five subjects in selective sensation. Six subjects showed statistically significant improvement ( Benferroni-corrected) in hybrid modality in comparison with both motor imagery and selective sensation. Furthermore, among subjects having difficulties in both motor imagery and selective sensation, the hybrid modality improves their performance to 90% accuracy. The proposed hybrid modality BCI has demonstrated clear benefits for those poorly performing BCI users. Not only does the requirement of motor and sensory anticipation in this hybrid modality provide basic function of BCI for communication and control, it also has the potential for enhancing the rehabilitation during motor recovery.