An independent brain-computer interface using covert non-spatial visual selective attention.
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An independent brain-computer interface using covert non-spatial visual selective attention. / Zhang, Dan; Maye, Alexander; Gao, Xiaorong; Hong, Bo; Engel, Andreas K.; Gao, Shangkai.
In: J NEURAL ENG, Vol. 7, No. 1, 1, 2010, p. 16010.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - An independent brain-computer interface using covert non-spatial visual selective attention.
AU - Zhang, Dan
AU - Maye, Alexander
AU - Gao, Xiaorong
AU - Hong, Bo
AU - Engel, Andreas K.
AU - Gao, Shangkai
PY - 2010
Y1 - 2010
N2 - In this paper, a novel independent brain-computer interface (BCI) system based on covert non-spatial visual selective attention of two superimposed illusory surfaces is described. Perception of two superimposed surfaces was induced by two sets of dots with different colors rotating in opposite directions. The surfaces flickered at different frequencies and elicited distinguishable steady-state visual evoked potentials (SSVEPs) over parietal and occipital areas of the brain. By selectively attending to one of the two surfaces, the SSVEP amplitude at the corresponding frequency was enhanced. An online BCI system utilizing the attentional modulation of SSVEP was implemented and a 3-day online training program with healthy subjects was carried out. The study was conducted with Chinese subjects at Tsinghua University, and German subjects at University Medical Center Hamburg-Eppendorf (UKE) using identical stimulation software and equivalent technical setup. A general improvement of control accuracy with training was observed in 8 out of 18 subjects. An averaged online classification accuracy of 72.6 +/- 16.1% was achieved on the last training day. The system renders SSVEP-based BCI paradigms possible for paralyzed patients with substantial head or ocular motor impairments by employing covert attention shifts instead of changing gaze direction.
AB - In this paper, a novel independent brain-computer interface (BCI) system based on covert non-spatial visual selective attention of two superimposed illusory surfaces is described. Perception of two superimposed surfaces was induced by two sets of dots with different colors rotating in opposite directions. The surfaces flickered at different frequencies and elicited distinguishable steady-state visual evoked potentials (SSVEPs) over parietal and occipital areas of the brain. By selectively attending to one of the two surfaces, the SSVEP amplitude at the corresponding frequency was enhanced. An online BCI system utilizing the attentional modulation of SSVEP was implemented and a 3-day online training program with healthy subjects was carried out. The study was conducted with Chinese subjects at Tsinghua University, and German subjects at University Medical Center Hamburg-Eppendorf (UKE) using identical stimulation software and equivalent technical setup. A general improvement of control accuracy with training was observed in 8 out of 18 subjects. An averaged online classification accuracy of 72.6 +/- 16.1% was achieved on the last training day. The system renders SSVEP-based BCI paradigms possible for paralyzed patients with substantial head or ocular motor impairments by employing covert attention shifts instead of changing gaze direction.
KW - Adult
KW - Germany
KW - Humans
KW - Male
KW - Female
KW - Young Adult
KW - Cohort Studies
KW - Attention physiology
KW - Brain physiology
KW - China
KW - Electroencephalography methods
KW - Evoked Potentials, Visual
KW - Learning physiology
KW - Motion Perception physiology
KW - Photic Stimulation
KW - Practice (Psychology)
KW - Signal Processing, Computer-Assisted
KW - Time Factors
KW - User-Computer Interface
KW - Visual Perception physiology
KW - Adult
KW - Germany
KW - Humans
KW - Male
KW - Female
KW - Young Adult
KW - Cohort Studies
KW - Attention physiology
KW - Brain physiology
KW - China
KW - Electroencephalography methods
KW - Evoked Potentials, Visual
KW - Learning physiology
KW - Motion Perception physiology
KW - Photic Stimulation
KW - Practice (Psychology)
KW - Signal Processing, Computer-Assisted
KW - Time Factors
KW - User-Computer Interface
KW - Visual Perception physiology
M3 - SCORING: Zeitschriftenaufsatz
VL - 7
SP - 16010
JO - J NEURAL ENG
JF - J NEURAL ENG
SN - 1741-2560
IS - 1
M1 - 1
ER -
