Interactions between nasal and temporal hemiretinal fibers in adult goldfish tectum
Interactions between nasal and temporal hemiretinal fibers in adult goldfish tectum
复制标题
成年金鱼顶盖鼻侧和颞侧半视网膜纤维之间的相互作用
DOI：
10.1016/0306-4522(79)90221-5
复制
发表时间：
1979
期刊：
影响因子：
3.3
通讯作者：
Y. Tung
中科院分区：
文献类型：
--
作者：
S. Sharma;Y. Tung
在成年金鱼中，一只眼睛的鼻半视网膜和另一只眼睛的颞半视网膜被切除，然后左顶骨消融。视顶投影随后进行电生理映射。对侧半视网膜投射到整个顶盖，视野扩大；投影是有序的。一只眼睛的颞半视网膜和另一只眼睛的鼻半视网膜在顶盖的中间部分重叠，而吻侧和尾侧顶盖则完全由相应的半视网膜支配。当切除两只眼的颞部半视网膜并切除左顶盖时，一些动物显示对侧半视网膜视野扩展到顶盖；然而，在其他动物中，同侧突起部分或完全支配顶盖，并且来自两只眼睛的突起以镜像方式重叠。研究结果讨论了控制选择性纤维再生的机制和潜在的纤维间相互作用。
In adult goldfish the nasal half-retina from one eye and the temporal half-retina from the other eye were removed, followed by left tectal ablation. Visuotectal projections were later mapped electrophysiologically. The contralateral half-retina projected to the entire tectum and showed expansion of the visual field; the projection was orderly. Partially superimposed projections from the temporal half-retina of one eye and the nasal half-retina from the other eye were found in the middle of the tectum, whereas the rostral and caudal tectum were innervated exclusively by the appropriate half-retina. When temporal half-retinae from two eyes were ablated along with left tectal removal, some animals showed expansion of the contralateral half-retinal field onto the tectum; however, in other animals the ipsilateral projection innervated the tectum either partially or completely and the projections from two eyes were superimposed in mirror-image fashion.The results are discussed in relation to the mechanisms controlling selective fiber regeneration with underlying fiber-to-fiber interactions.