The Tohoku Journal of Experimental Medicine
Online ISSN : 1349-3329
Print ISSN : 0040-8727
ISSN-L : 0040-8727
The Mechanism of Spatial Induction in the Retina
片山 新一郎, 相澤 匡
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1956 年 64 巻 2 号 p. 179-187

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By the method of electrostimulation, the time course of development of indirect retinal induction was investigated. Indirect induction is a physiological correlate of simultaneous contrast.
1. Indirect induction appears with a latent period of 60 msec. in the immediate neighborhood of the retinal part illuminated by colored light.
2. The intensity of indirect induction increases with the lapse of time after removal of colored light, and reaches a constant level in about 300 msec.
3. At various distances from the area illuminated by colored light, development of indirect induction was measured, and it was found that the development is delayed in proportion to the distance. From this relation the velocity of spread of indirect induction was determined. The velocity was found to be 1.69mm./sec. in the retina in complete agreement with the value determined by Motokawa with another method.

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    The Tohoku Journal of Experimental Medicine (TJEM) was founded in 1920 by professors of Tohoku Imperial University, Medical School. The TJEM has been published continuously, except for the year of 1946 just after the World War II. The TJEM is open to original articles in all branches of medical sciences. The TJEM also covers the fields of disaster-prevention science, including earthquake archeology.


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