Local adaptation in the ventral photoreceptors of Limulus.
作者信息
Fein A, Charlton J S
出版信息
J Gen Physiol. 1975 Dec;66(6):823-36. doi: 10.1085/jgp.66.6.823.
Abstract
Local adaptation was demonstrated in the ventral photoreceptors of Lumulus using either flashes or continuous illumination. Spots of light locally desensitized the region of the photoreceptor on which they were focused. In dark-adapted photoreceptors where "quantum bumps" were clearly discernible, local adaptation of the quantum bumps was observed. Local adaptation could induce differences of threshold of 1 decade over distances of 50-80 mum. With continuous local illumination these gradients could be maintained from 2 s to 30 min. In addition, the decrease in time scale associated with light adaptation was also found to be localized to the region of illumination.
摘要
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