Herron M A, Martin J E, Joyce J R
Am J Vet Res. 1978 Jul;39(7):1137-9.
A quantitative study of optic axons in the optic tracts of several species was performed to determine the number and percentage of optic axons that decussate. Animals were prepared by unilateral ocular enucleation, and light microscopic techniques were employed to count the fibers. The mean number of fibers projecting from a single eye was 732,119 for the pony, 1,041,739 for the cow, 534,755 for the sheep, and 442,629 for the pig. The mean degree of crossover at the chiasm was 80.8% in ponies, 82.9% in cattle, 88.9% in sheep, and 87.8% in pigs.
对几个物种视束中的视神经轴突进行了定量研究，以确定交叉的视神经轴突的数量和百分比。通过单侧眼球摘除术制备动物，并采用光学显微镜技术计数纤维。单眼投射的纤维平均数，小马为732,119条，牛为1,041,739条，绵羊为534,755条，猪为442,629条。视交叉处的平均交叉程度，小马为80.8%，牛为82.9%，绵羊为88.9%，猪为87.8%。
