Cowey A, Franzini C
Exp Brain Res. 1979 May 2;35(3):443-55. doi: 10.1007/BF00236763.
An attempt was made to sever the optic chiasma in the mid-sagittal plane in 12 rats. This was successful in 8 animals. Provided there was no additional substantial damage to the uncrossed optic fibres the rats were able to relearn an intensity discrimination and to learn or relearn an orientation discrimination, although optokinetic following was abolished. The results unequivocally demonstrate that the uncrossed optic fibres can mediate two kinds of visual discrimination. The area of retina giving rise to the uncrossed fibres was determined from the position of undegenerated retinal ganglion cells in each eye following section of the chiasma, and in one eye of 4 rats in which one optic tract was entirely or extensively destroyed. The ganglion cells giving rise to the uncrossed optic fibres occupy about 40 degrees of the temporal retina, corresponding to the binocular overlap in the visual field.
对12只大鼠进行了在矢状面中部切断视交叉的尝试。8只动物手术成功。只要未交叉的视神经纤维没有受到额外的严重损伤，大鼠就能重新学习强度辨别，以及学习或重新学习方向辨别，尽管视动跟踪被消除了。结果明确表明，未交叉的视神经纤维可以介导两种视觉辨别。通过视交叉切断后每只眼中未退化的视网膜神经节细胞的位置，以及在4只大鼠的一只眼中其中一条视束被完全或广泛破坏的情况，确定了产生未交叉纤维的视网膜区域。产生未交叉视神经纤维的神经节细胞占据颞侧视网膜约40度的范围，这与视野中的双眼重叠区域相对应。
