Mascetti G G, Arriagada J R
Laboratorio de Neurobiología, Facultad de Ciencias Biológicas, P. Universidad Católica de Chile, Santiago.
Exp Neurol. 1988 Aug;101(2):276-87. doi: 10.1016/0014-4886(88)90011-8.
The interocular transfer of the extinction of visual pattern discrimination was studied in cats with either section of optic chiasm (split-chiasm cats) or combined sections of chiasm and forebrain commissures (split-brain cats). Visual pattern discriminations were monocularly learned and their interocular transfer was assessed through the opposite eye. Then, learning was unilaterally extinguished and interocular transfer of extinction was tested on the other side. In split-chiasm cats, the total number of trials to extinction criterion (EC) was significantly lower with the second eye than with the first eye, indicating a successful interocular transfer. In split-brain cats, EC with the second eye was attained faster than with the first in some performances; it was similar with both eyes in other tasks, and with the second eye was higher than with the first in still other tasks. Statistical analysis applied to this group of split-brain cats pointed out that extinction performances with the two eyes were not significantly different. These findings suggest that interocular transfer of extinction was abolished in split-brain cats and that memory for extinction was unilaterally established in the absence of forebrain commissures.
在视交叉切断的猫（裂脑猫）或视交叉与前脑连合同时切断的猫（裂脑猫）中，研究了视觉模式辨别消退的眼间转移。视觉模式辨别是单眼学习的，并通过对侧眼评估其眼间转移。然后，单侧学习消退，并在另一侧测试消退的眼间转移。在裂脑猫中，达到消退标准（EC）的试验总数，第二只眼比第一只眼显著更低，表明眼间转移成功。在裂脑猫中，在某些表现中，第二只眼比第一只眼更快达到EC；在其他任务中，两只眼相似；在另外一些任务中，第二只眼比第一只眼更高。对这组裂脑猫进行的统计分析指出，两只眼的消退表现没有显著差异。这些发现表明，裂脑猫中消退的眼间转移被消除，并且在没有前脑连合的情况下，消退记忆是单侧建立的。
