Visual spatial attention tracking using high-density SSVEP data for independent brain-computer communication

摘要: The steady-state visual evoked potential (SSVEP) has been employed successfully in brain-computer interface (BCI) research, but its use a design entirely independent of eye movement until recently not reported. This paper presents strong evidence suggesting that the SSVEP can be used as an electrophysiological correlate spatial attention may harnessed on own or conjunction with other correlates to achieve control BCI. In this study, 64-channel electroencephalography data were recorded from subjects who covertly attended one two bilateral flicker stimuli superimposed letter sequences. Offline classification left/right was attempted by extracting SSVEPs at optimal channels selected for each subject basis scalp distribution magnitudes. yielded average accuracy approximately 71% across ten (highest 86%) comparable separate cases which frequencies set within and outside alpha range respectively. Further, combining features attention-dependent parieto-occipital band modulations resulted 79% 87%).