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Event-related potentials in a moving matrix modification of the P300 brain-computer interface paradigm.
MedLine Citation:
PMID:  21511006     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
In the standard design of the brain-computer interfaces (BCI) based on the P300 component of the event-related potentials (ERP), target and non-target stimuli are presented at fixed positions in a motionless matrix. Can we let this matrix be moving (e.g., if attached to a robot) without loosing the efficiency of BCI? We assessed changes of the positive peak at Pz in the time interval 300-500ms after the stimulus onset (P300) and the negative peak at the occipital electrodes in the range 140-240ms (N1), both important for the operation of the P300 BCI, during fixating a target cell of a moving matrix in healthy participants (n=12). N1 amplitude in the difference (target-non-target) waveforms decreased with the velocity, although remained high (M=-4.3, SD=2.1) even at highest velocity (20°/s). In general, the amplitudes and latencies of these ERP components were remarkably stable in studied types of matrix movement and all velocities of horizontal movement (5, 10 and 20°/s) comparing to matrix in fixed position. These data suggest that, for the users controlling their gaze, the P300 BCI design can be extended to modifications requiring stimuli matrix motion.
Authors:
Sergei L Shishkin; Ilya P Ganin; Alexander Ya Kaplan
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-4-12
Journal Detail:
Title:  Neuroscience letters     Volume:  -     ISSN:  1872-7972     ISO Abbreviation:  -     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-4-22     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7600130     Medline TA:  Neurosci Lett     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011. Published by Elsevier Ireland Ltd.
Affiliation:
Lomonosov Moscow State University, Faculty of Biology, Laboratory for Neurophysiology and Neuro-Computer Interfaces, 1/12 Leninskie Gory, Moscow 119991, Russia; National Research Nuclear University MEPhI, Department of Biophysics, Radiation Physics and Ecology, 31 Kashirskoye Shosse, Moscow 119991, Russia.
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