PASCAL - Pattern Analysis, Statistical Modelling and Computational Learning

Alpha-modulation induced by covert attention shifts as a new input modality for EEG-based BCIs
NM Schmidt, Benjamin Blankertz and MS Treder
In: IEEE Conference on Systems, Man and Cybernetics (SMC2010), Istanbul, Turkey(2010).


Covert attention shifts to the visual periphery induce modulations of α-bandpower over occipital cortex. By demonstrating robust classification of covert attention shifts to four different target locations, a recent magnetoencephalography (MEG) study set the first step for its use as a new input modality to brain-computer interfaces (BCIs) [1]. Here, we set the next step by investigating its feasibility using electroencephalography (EEG). Eight healthy participants had to shift covert visual attention to one of six different target locations while strictly fixating the center of the screen. To enhance the spatial resolution, we used a current source density (CSD) estimate instead of raw voltage maps. Covert attention shifts to the different target locations yielded distinctive topographical distributions of posterior alpha activity.

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EPrint Type:Conference or Workshop Item (Talk)
Project Keyword:Project Keyword UNSPECIFIED
Subjects:Brain Computer Interfaces
ID Code:8044
Deposited By:Benjamin Blankertz
Deposited On:17 March 2011