抄録
By the method of electrostimulation the reflection of spreading induction in the human retina was investigated. Spreading induction is a propagated process initiated by a colored light and has an effect to extinguish or neutralize a physiological after-effect of another colored light.
1. The propagation of spreading induction is blocked by a white line or its after-image existing on the way of propagation.
2. The direction of propagation is so changed by a white line as it follows the law of reflection.
3. When spreading induction is set up by a colored light placed at one focus of an elliptic white line figure, so it converges into the other focus.
4. When a colored spot is presented at the focus of a parabolic white line figure, the direction of propagation of spreading induction becomes parallel to the axis of the parabola.
5. If a colored spot is presented at the center of a circular white line figure, the retinal induction caused by the colored light is neutralized by the reflected spreading induction. This phenomenon is called “selfneutralization”.
6. The propagation velocity of spreading induction was measured utilizing the phenomenon of selfneutralization. The value obtained by this method showed close agreement with those obtained by different methods of approach.
