Synaptic connexions made by horizontal cells within the outer plexiform layer of the retina of the cat and the rabbit
Synaptic connexions made by horizontal cells within the outer plexiform layer of the retina of the cat and the rabbit
复制标题
猫和兔子视网膜外丛状层内水平细胞形成的突触连接
DOI：
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发表时间：
1974
期刊：
影响因子：
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通讯作者：
B. Boycott
中科院分区：
文献类型：
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作者：
S. Fisher;B. Boycott
在猫和兔的视网膜中描述了两种在超微结构上不同类型的水平细胞。有证据表明，它们在外丛状层有不同的突触连接。在兔的外丛状层中发现的大多数突触前结构(如第320页所定义)属于神经丝状水平细胞类型。据推测，这只猫可能是一样的。在以神经管为主的第二种水平细胞上没有发现突触，也没有发现突触来自第二种水平细胞。没有在水平细胞上或水平细胞之间发现化学突触。因此，这两种类型的水平细胞的这种输入目前还只知道来自光感受器。阳性的突触后突起均为双极细胞的树突或核膜。其他类型的细胞可能是突触前或突触后的外丛状层进行了讨论。
Two ultrastructurally distinctive types of horizontal cells are described in the retinae of the cat and the rabbit. Evidence is presented that they have different synaptic connexions in the outer plexiform layer. The majority of the presynaptic structures identified in the outer plexiform layer of the rabbit (as defined on page 320) belong to a neurofilamentous type of horizontal cell. It is suggested that the cat may be the same. No synapses have been identified on to, or from, the second, predominantly neurotubular, type of horizontal cell. No chemical synapses on to, or between, horizontal cells have been found. Thus input of this kind to both types of horizontal cells is as yet only known to be from the photoreceptors. All positively identified postsynaptic processes were the dendrites or perikarya of bipolar cells. Other cell types that are possibly pre- or postsynaptic in the outer plexiform layer are discussed.