Laboratory of Function and Morphology, Department of Animal Science, Faculty of Agriculture, Utsunomiya University, Utsunomiya, Utsunomiya, Tochigi, Japan.
Anim Sci J. 2010 Feb;81(1):108-15. doi: 10.1111/j.1740-0929.2009.00703.x.
In this study, retinal whole-mount specimens were prepared and stained with 0.1% cresyl violet for the ganglion cell study in the ostrich (Struthio camelus). The total number, distribution, and size of these cells were determined in different retinal regions. The mean total number of ganglion cells (three retinas) was 1,435,052 with an average density of 652 cells/mm(2). The temporo-nasal area of the retina with high cell density were identified with the peak of 7525 cells/mm(2) in the central area. The size of most ganglion cells ranged from 113-403 microm(2), with smaller cells predominating along the temporo-nasal streak above the optic disc and larger cells comprising more of the peripheral regions. The average thickness of the retina was 196 microm. The central area was the thickest area (268.6 microm), whereas the peripheral area was the thinnest area. Thus, the specialization of ganglion cell densities, their sizes and the thickness of the retina support the notion that the conduction of visual information towards the brain from all regions of the retina is not uniform, and suggests that the temporo-nasal streak is the fine quality area for vision in ostriches.
在这项研究中，我们制备了鸵鸟（Struthio camelus）的视网膜全层标本，并使用 0.1%的甲苯胺蓝进行染色，以研究神经节细胞。我们在不同的视网膜区域确定了这些细胞的总数、分布和大小。三个视网膜的神经节细胞总数平均值为 1,435,052 个，平均密度为 652 个/平方毫米。视网膜颞侧-鼻侧区域的细胞密度较高，中央区域的细胞密度峰值为 7525 个/平方毫米。大多数神经节细胞的大小在 113-403 微米之间，视盘上方颞侧-鼻侧条纹处的细胞较小，而周边区域的细胞较大。视网膜的平均厚度为 196 微米。中央区域是最厚的区域（268.6 微米），而周边区域是最薄的区域。因此，神经节细胞密度、大小和视网膜厚度的专门化支持这样一种观点，即来自视网膜所有区域的视觉信息向大脑的传导并不均匀，并表明颞侧-鼻侧条纹是鸵鸟视觉的精细质量区域。
