NDLI: P300-based brain computer interface experimental setup

Content Provider	IEEE Xplore Digital Library
Author	Arboleda, C. Garcia, E. Posada, A. Torres, R.
Copyright Year	2009
Description	Author affiliation: Biomedical Engineering at both EIA and CES University (Medellín, Colombia (Arboleda, C.; Garcia, E.; Posada, A.) \|\| Electrical Engineering at the Poly-technique University of Valencia (Valencia, Spain (Torres, R.)
Abstract	A Brain-Computer interface (BCI) is a communication system that enables the generation of a control signal from brain signals such as sensorymotor rhythms and evoked potentials; therefore, it constitutes a novel communication option for people with severe motor disabilities (such as Amyotrophic Lateral Sclerosis patients). This paper presents the development of a P300-based BCI. This prototype uses a homemade six-channel electroencephalograph for the acquisition of the signals, and a visual stimulation matrix; since this matrix contains letters of the alphabet as well as images associated to them, it permits word-writing and the elaboration of messages with the images. To process the signals the software BCI2000 and MATLAB 7.0 were used. The latter was used to program three linear translation algorithms (Stepwise Linear Discriminant Analysis, Lineal Discriminant Analysis and Least Squares) to convert the brain signals into communication signals. These algorithms had a classification accuracy of 90.73 %, 95.75 % and 89.45 % respectively, when using raw data; and of 90.78%, 49.48 % and 53.9 %, when data was previously common-average filtered. The experimental setup was tested in ten healthy volunteers; 5 of them got a 100% success, 1 a 90% success, 2 an around 70% success and 2 a 50% success, in the online free-spelling tests.
Starting Page	598
Ending Page	601
File Size	429013
Page Count	4
File Format	PDF
ISBN	9781424432967
ISSN	1557170X
DOI	10.1109/IEMBS.2009.5333794
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-09-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Brain computer interfaces Testing Signal generators Communication system control Control systems Rhythm Software prototyping Prototypes Signal processing MATLAB translation algorithms Augmentative and Alternative Communication brain-computer interface electroencephalography motor disabilities P300 cognitive evoked potential signal processing
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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