A gaze/SSVEP based Wheelchair Command

The goal of this manuscript is to present a new hybrid system based on the fusion of gaze data and Steady State Visual Evoked Potentials (SSVEP) to command a powered wheelchair. The motivation behind this work is the shortages raised from the individual use of gaze based and SSVEP based wheelchair command techniques. The proposed framework is based on two modules : a gaze module to select command and activate the flashing stimuli. An SSVEP module to validate the selected command. An experimental protocol was set up and the prototype was tested on five paraplegic subjects. The results showed that the run accuracy reached an average of 98%. Navigation performance was assessed based on navigation time, obstacles collisions and optimal path deviation.