A lambda-shaped retractor lentis muscle in the yellowfin goby Acanthogobius flavimanus
A lambda-shaped retractor lentis muscle in the yellowfin goby Acanthogobius flavimanus
复制标题
黄鳍虾虎鱼 Acanthogobius flavimanus 的 lambda 形牵开晶状体肌
DOI：
10.1002/jmor.20961
复制
发表时间：
2019
影响因子：
1.5
通讯作者：
Yamamoto N
中科院分区：
文献类型：
--
作者：
Miyazaki T;Kato A;Ikenaga T;Hagio H;Yamamoto N
我们在黄鳍虾蛄（acanthogobius flavimanus）中发现了一种形态上不常见的鱼类牵开体肌。这种扁豆肌的形状类似于希腊字母λ。肌的两条腿附着在眼杯腹侧的视网膜周围，而其尖端通过韧带连接到晶状体表面。扫描电镜显示，晶状体肌的纤维沿前肢和后肢的长度延伸。用抗乙酰化微管蛋白抗体进行免疫标记，并用DiI对整个扁豆肌进行神经元示踪，结果显示前腿受一条或多条神经支配。研究了视网膜中神经节细胞的地形分布，以确定视轴。在背颞、鼻腹和腹颞视网膜上观察到三个高密度细胞区。这些发现表明，λ形的晶状体肌可能使晶状体向颞、鼻和/或腹侧视网膜进行调节运动。
We identified a morphologically uncommon piscine retractor lentis muscle in the yellowfin gobyAcanthogobius flavimanus. This lentis muscle has a shape similar to the Greek small letter lambda (λ). The two legs of the muscle are attached to the retinal periphery at the ventral eyecup, while the tip is connected to the lens surface by a ligament. Scanning electron microscopy showed that the fibers of the lentis muscle run along the length of both the anterior and posterior legs. Immunolabeling with antiacetylated tubulin antibody and neuronal tracing with DiI of the whole lentis muscle revealed that the anterior leg is innervated by one or more nerves. The topographic distribution of ganglion cells in the retina was investigated to identify the visual axis. Three high cell density areas were observed in the dorso‐temporal, ventro‐nasals and ventro‐temporal retina. These findings suggest that the λ‐shaped lentis muscle may enable accommodatory movement of the lens toward the temporal as well as the nasal and/or ventral retina.