LIGHT-EVOKED CHANGES IN EXTRACELLULAR CALCIUM-CONCENTRATION IN FROG RETINA

被引：32

作者：

LIVSEY, CT ^{[1
]}

HUANG, B ^{[1
]}

XU, J ^{[1
]}

KARWOSKI, CJ ^{[1
]}

机构：

[1] UNIV GEORGIA,DEPT PSYCHOL,VIS RES LAB,ATHENS,GA 30602

来源：

VISION RESEARCH | 1990年 / 30卷 / 06期

关键词：

Retina Extracellular space Calcium concentration Subretinal space Photoreceptors Ionselective microelectrode Rana pipiens;

D O I：

10.1016/0042-6989(90)90054-O

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

Light-evoked changes in extracellular Ca2+ concentration were recorded with Ca2+ -selective microelectrodes in the retina of the frog eyecup. A Ca-decrease at light onset and offset was found in the inner plexiform layer, and its properties are consistent with it resulting from Ca2+ influx into activated neuronal terminals. In the subretinal space, a Ca-increase at light onset and a Ca-decrease at offset were observed, and these likely arise directly from photoreceptors. A slower ON Ca-decrease was also seen here. Because it survives pharmacological isolation of the photoreceptors from post-synaptic interactions, but not physical isolation of the retina from the pigment epithelium, this component probably depends on pigment epithelial activity. © 1990.

引用

页码：853 / 861

页数：9

共 37 条

[1]

ADORANTE J, 1989, Investigative Ophthalmology and Visual Science, V30, P169

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