THE LATERAL SPREAD OF SIGNAL BETWEEN BIPOLAR CELLS OF THE TIGER SALAMANDER RETINA

被引：9
|
作者：
BORGES, S [1 ]
WILSON, M [1 ]
机构：
[1] UNIV CALIF DAVIS,DEPT ZOOL,DAVIS,CA 95616
来源：
BIOLOGICAL CYBERNETICS | 1990年 / 63卷 / 01期
关键词：
D O I：
10.1007/BF00202452
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
When mapped with a small spot of light, the central receptive fields of bipolar cells in the salamander retina are much larger than the extent of bipolar cell dendrites. Furthermore responses of bipolar cells to distant spots of light are considerably delayed relative to proximal spots. Using quantitative modelling, electrical coupling between bipolar cells is examined and rejected as a sufficient explanation of the data. An active process appears to shape signal waveform as signals spread laterally in the bipolar cell layer. Chemical synaptic coupling between bipolar cells is considered and shown to be inconsistent with the data. It is suggested that local, transient negative feedback from amacrine cells is involved in shaping bipolar cell signals. © 1990 Springer-Verlag.
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页码：45 / 50
页数：6
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