Experimental platform of brain computer orientated interfaces to control wheelchairs

In this paper is presented the implementation of a Brain-Computer Interface, based in the P300 event related potential response, aimed to command a simulated wheelchair. Is proposed a modification of the original Farwell and Donchin stimulation matrix, introducing new symbols that when intensifying they change from black to red color. These symbols are defined to codify direction and speed of the movement of the simulated wheelchair. The software BCI2000 was used for signal acquisition, stimulation and classification. Preliminary evaluations allow obtaining clears P300 responses, which were able to be easily classified in offline procedures. Also the communication protocol from BCI2000 output, to the wheelchair simulation module was successfully tested.