Abreu M, Kicliter E, Lugo-Garcia N
Institute of Neurobiology, University of Puerto Rico, Río Piedras.
P R Health Sci J. 1993 Jun;12(2):137-41.
In some mammals a large portion of the retinal neurons of the ganglion cell layer are not ganglion cells. These neurons, lacking axons which pass to the brain via the optic nerve, are termed displaced amacrine cells. The present study assessed the number of displaced amacrine cells in the thirteen-lined ground squirrel (Spermophilus tridecemlineatus). We compared the number of labeled cells in the ganglion cell layer after HRP injection of optic tracts and target nuclei with the total number of neurons in the ganglion cell layer. We conclude that approximately one half of the neurons in the ganglion cell layer are displaced amacrine cells, the other one half are ganglion cells. The displaced amacrine cells are on the average smaller than the ganglion cells. Our results provide a rationale for renewed study of relation of ganglion cell morphology and physiological functional type in this species.
在一些哺乳动物中，神经节细胞层的大部分视网膜神经元并非神经节细胞。这些神经元缺乏通过视神经传递至大脑的轴突，被称为移位无长突细胞。本研究评估了十三条纹地松鼠（Spermophilus tridecemlineatus）中移位无长突细胞的数量。我们将视神经束和靶核注射辣根过氧化物酶（HRP）后神经节细胞层中标记细胞的数量与神经节细胞层中神经元的总数进行了比较。我们得出结论，神经节细胞层中约一半的神经元是移位无长突细胞，另一半是神经节细胞。移位无长突细胞平均比神经节细胞小。我们的结果为重新研究该物种中神经节细胞形态与生理功能类型之间的关系提供了理论依据。
