Discrimination of EEGs on Recalling Ten Images of Robot Movement -Control of Robot Palmi-

Abstract

The authors measured electroencephalograms (EEGs) from subjects on recognizing and on recalling ten types of movement images of a robot Palmi (DMM.com) on a PC monitor. Each presented image was line drawing in white on a black background. We have measured EEGs from four subject during watching the images. The canonical discriminant analysis was applied to these single trial EEGs. Four channels of EEGs at the right frontal and temporal were used in the discrimination. They were Fp2, F4, C4 and F8 according to the international 10-20 system. Sampling data were taken from 400ms to 900ms at 25ms intervals from each single trial EEG. The number of variates is twenty one by four channels; so the data are eighty four dimensional vectors. The number of external criteria is ten, and a number of explanation variates is thus eighty four. Results of the canonical discriminant analysis by use of so-called jack knife method were more than 90 % for four subjects. EEGs were analyzed by the equivalent current dipole method. Some results were explained . Further, the reversions of EEG potential during processing symbol which has opposite meaning each other were observed the same as precedent our researches.