Studies on the optic chiasm of the leopard frog. I. Selective loss of visually elicited avoidance behavior after optic chiasm hemisection.
Studies on the optic chiasm of the leopard frog. I. Selective loss of visually elicited avoidance behavior after optic chiasm hemisection.
复制标题
豹纹蛙视交叉的研究.
DOI：
10.1159/000113261
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Gruberg,ER
中科院分区：
文献类型：
--
作者：
Waldeck,RF;Gruberg,ER
我们将视交叉的后部或前部半切，发现青蛙对视野中任何地方迫在眉睫的大刺激都没有反应。尽管如此，动物对猎物刺激的反应是通过整个视野进行的。对迫在眉睫的刺激的反应在术后 1 至 8 周内恢复。完全横断交叉后，动物对猎物和迫在眉睫的大刺激都没有反应。如果视交叉被切断或视后连合被切断，青蛙对猎物和迫在眉睫的刺激反应正常。由于对隐约刺激的反应在被切断的光纤再生之前就恢复了，这些结果表明，有关猎物和大型隐约物体的视觉信息是由单独的视神经纤维系统介导的。
We hemisected either the posterior or anterior portion of the optic chiasm and found that frogs were unresponsive to large looming stimuli anywhere in the visual field. Nonetheless, the animals responded to prey stimuli throughout the visual field. Responses to looming stimuli returned in 1 to 8 weeks post-surgery. After complete transection of the chiasm animals were unresponsive to both prey and large looming stimuli. Frogs responded normally to prey and looming stimuli if less than half the optic chiasm was cut or if the postoptic commissure was cut. Since responses to looming stimuli returned before cut optic fibers could regenerate, these results suggest that visual information concerning prey and large looming objects are mediated by separate optic nerve fiber systems.