+EOGを利用したコミュニケーションシステムの開発のための基礎的検討

概要

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As a preliminary experiment on the development of a multifunctional communication system using the electro-oculogram (EOG) of the eyeball, a comparison between the direction of eye movement and the EOG recording was carried out in four normal subjects. The EOGs were detected by horizontal and vertical leads with surface electrodes placed around the right eye. The fundamental eye movements included of the abduction, adduction, elevation and depression pursued by a light indicator of the nystagmic stimulator (NIHON KOHDEN ; SLE-5100), and the voluntary cycloduction. In the horizontal eye movement, both displacement and velocity components in the EOG to abduction and adduction accurately coincided with pursuit movement of a light indicator. In the vertical eye movement, however, the two components in the EOG to elevation and depression showed slight movements of abduction and adduction together with mainmovements of elevation and depression. It was suggested that a precise detection of the multifunctional signals in the EOG may be applicable to expression of the mind of severely disabled as a communication tool.