Brain-computer communication and slow cortical potentials.
A thought translation device (TTD) has been designed to enable direct brain-computer communication using self-regulation of slow cortical potentials (SCPs). However, accuracy of SCP control reveals high intersubject variability. To guarantee the highest possible communication speed, some important aspects of training SCPs are discussed. A baseline correction of SCPs can increase performance. Multichannel recordings show that SCPs are of highest amplitude around the vertex electrode used for feedback, but in some subjects more global distributions were observed. A new method for control of eye movement is presented. Sequential effects of trial-to-trial interaction may also cause difficulties for the user. Finally, psychophysiological factors determining SCP communication are discussed.
Hinterberger
Thilo
T
Institute of Medical Psychology and Behavioral Neurobiology, University of Tübingen, 72076 Tübingen, Germany. thilo.hinterberger@uni-tuebingen.de
Schmidt
Stefan
S
Neumann
Nicola
N
Mellinger
Jürgen
J
Blankertz
Benjamin
B
Curio
Gabriel
G
Birbaumer
Niels
N
D000328:Adult; D000465:Algorithms; D001676:Biofeedback, Psychology / Q000502:physiology*; D002540:Cerebral Cortex / Q000502:physiology*; D003071:Cognition / Q000502:physiology; D003143:Communication Devices for People with Disabilities; D004569:Electroencephalography / Q000379:methods*; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014584:User-Computer Interface