Birch M P, Ferrier R J, Cooper R M
J Comp Physiol Psychol. 1978 Dec;92(6):1050-61. doi: 10.1037/h0077514.
Rats given large visual cortex lesions demonstrated a simultaneous task reversal deficit previously reported to follow more extensive cortical ablation. However, no deficit appeared in an operant discrimination that deemphasized visuospatial cues, and the simultaneous task deficit vanished when translucent eye occluders were applied to eliminate spatial, but not intensity, cue use. Because the lesion subjects showed an impairment only when visuospatial cues were available and relevant to correct reversal performance, they seemed hindered by their incompetent processing of visuospatial information. The results are interpreted as support for spatial rather than learning approaches to visual cortex function.
接受大面积视觉皮层损伤的大鼠表现出一种同时性任务反转缺陷，此前有报道称这种缺陷会在更广泛的皮层切除后出现。然而，在一项淡化视觉空间线索的操作性辨别任务中并未出现缺陷，并且当使用半透明眼罩来消除空间线索（而非强度线索）的使用时，同时性任务缺陷消失了。由于损伤的实验对象仅在视觉空间线索可用且与正确的反转表现相关时才表现出损伤，它们似乎受到了视觉空间信息处理能力不足的阻碍。这些结果被解释为支持视觉皮层功能的空间理论而非学习理论。
