INHIBITORY FIELDS IN LIMULUS LATERAL EYE
INHIBITORY FIELDS IN LIMULUS LATERAL EYE
复制标题
DOI：
10.1085/jgp.54.3.383
复制
发表时间：
1969-01-01
影响因子：
3.8
通讯作者：
BARLOW, RB
中科院分区：
文献类型：
--
作者：
BARLOW, RB
在limusus侧眼的受体单位（小眼）之间相互施加的抑制作用并不随着单位之间距离的增加而均匀地减弱。相反，一个受体单位的反应最有效地抑制其他单位从它分开约1毫米（三到五个受体直径）；当距离大于或小于这个值时，效果都会降低。通过抑制系数的空间函数所测量到的单胞抑制场在中心区域有一个均匀的凹陷，在离中心一定距离处有一个均匀的高环，并向外围逐渐变细。视场很大，覆盖视网膜的30%以上，呈椭圆形，其长轴在侧眼的前后方向。许多实验表明，在眼睛的相当一部分也有类似的结构。对照实验表明，视场中心附近抑制效应的减弱并不是测量技术的产物，也不能轻易地用局部神经兴奋过程来解释。
The inhibition that is exerted mutually among receptor units (ommatidia) of the lateral eye ofLimulusdoes not diminish uniformly with increasing distance between units. Instead the response of a receptor unit is most effectively inhibited by other units separated from it by approximately 1 mm (three to five receptor diameters); the effectiveness diminishes with distances both greater and less than this value. The ommatidial inhibitory field as measured by the spatial function of the inhibitory coefficients contains a uniform depression in the central region, a uniformly high annulus at some distance from the center, and a gradual tapering off toward the periphery. The field is large—covering over 30 % of the retina—and is somewhat elliptical in shape with its major axis in the anteroposterior direction on the lateral eye. A number of experiments reveal similar configurations in a sizable part of the eye. Control experiments show that the diminution of the inhibitory effects near the center of the field is not an artifact of the measuring technique and cannot be explained readily by local neural excitatory processes.