(8) Micro-robot control by use of EEG from frontal lobe at silent reading
Takahiro Yamanoi, Atsushi Moritaka, Fumihiro Kakumori, Hiroshi Takayanagi, Toshimasa Yamazaki, Michio Sugeno and Hidetoshi Nonaka
18th International Congress on Brain Electromagnetic Topography (ISBET2009), PS509(p.84), 2009-9
In order to develop a brain computer interface, the authors have investigated the brain activity during human recognition of symbols representing directional meaning. The authors have recorded electroencephalograms (EEGs) from subjects reading silently four types of arrows presented on CRT. Each of arrows has directions of upward, downward, leftward or rightward. EEGs were averaged for each direction, and event related potentials (ERPs) were obtained. As a result of the equivalent current dipole source localization (ECDL) method, equivalent current dipoles (ECDs) were localized to areas related to the working memory for spatial perception. In consideration of these facts, the authors applied the canonical discriminant analysis to the single trial EEGs. Four channels of EEGs at the right frontal and temporal had been used to discriminate the four types of symbols. They are 4, 6, 12 and 14 channels according to the International 10-20 system. Sampling EEGs were taken form 400 ms to 900 ms at 25 ms intervals. So the numbers of variates are twenty-one by four, i.e. eighty four. Results of the discriminant rates by use of the present system were more than 90 %. These results are improved from the precedent our research [1]. By four type code of infrared rays according to the discrimination results from a PC, the authors have controlled a micro robot the e-puck, with four orders: forward, rotate clockwise, rotate counterclockwise and stop. [1] Takahiro Yamanoi, Hisashi Toyoshima, Toshimasa Yamazaki, Shin-ichi Ohnishi, Michio Sugeno and Elie Sanchez. 2009. Micro Robot Control by Use of Electroencephalograms from Right Frontal Area. Journal of Advanced Computational Intelligence and Intelligent Information, 68-75.
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