Behavioral and physiological consequences of unilateral ablation of the nucleus isthmi in the leopard frog.
Behavioral and physiological consequences of unilateral ablation of the nucleus isthmi in the leopard frog.
复制标题
豹蛙峡核单侧消融的行为和生理后果。
DOI：
10.1159/000114350
复制
发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Mote,MI
中科院分区：
文献类型：
--
作者：
Gruberg,ER;Wallace,MT;Caine,HS;Mote,MI
峡部核的单侧损伤导致对侧单眼视野中视觉呈现的猎物和威胁刺激的暗点。暗点的大小和n的数量之间存在相关性。峡部消融。病变后，视野鼻侧部分的暗点消退，然后稳定。在较长的行为检查后，动物可分为两类：（1）暗点大小保持相对稳定长达两年的动物，以及（2）从暗点恢复的动物。在后一组中，往往会对N。峡部和背侧被盖后核位于N.地峡。从代表暗点的视顶盖区域内的位置的电生理记录显示，与对侧视顶盖中的镜像位置相比，多单位感受野的大小平均增加了三倍。
Unilateral lesions of the nucleus isthmi result in a scotoma to visually presented prey and threat stimuli in the contralateral monocular visual field. There is a correlation between the size of the scotoma and the amount of n. isthmi ablated. Following the lesion, there is a regression of the scotoma in the nasal part of the visual field which then stabilizes. Upon longer behavioral examination, the animals can be divided into two classes: (1) animals in which the scotoma remains relatively stable in size for up to two years, and (2) animals which recover from the scotoma. In the latter group, there tends to be damage to both the n. isthmi and the posterodorsal tegmental nucleus which lies mediocaudal to the n. isthmi. Electrophysiological recording from positions within the area of the optic tectum representing the scotoma reveal an average threefold increase in the size of the multiunit receptive fields compared to mirror image positions in the contralateral optic tectum.