Delay E R
Department of Psychology, Regis College, Denver, CO 80221.
Neuropsychologia. 1988;26(5):661-71. doi: 10.1016/0028-3932(88)90002-4.
Two experiments with visual decorticate rats examined the effects of cross-modality transfer on the recovery of a preoperatively learned avoidance task using high intensity light cues. In both experiments, brief postoperative cross-modality training with high intensity noise cues produced significantly better recovery of the visual avoidance response than either reversed intensity noise training or retraining with the original task. Training with a reversed intensity visual cue produced relearning deficits. In the second experiment, control conditions eliminated re-exposure to the test environment, the shock-response relationship, and compound conditioning as possible explanations for these findings. These results indicated that rats are capable of cross-modality transfer after posterior cortical lesions and that this transfer effect can facilitate recovery of behavioral function. The clinical implications of these findings are also discussed.
两项针对视觉皮层切除大鼠的实验，研究了跨感觉通道转换对术前习得的使用高强度光线索的回避任务恢复的影响。在这两项实验中，术后用高强度噪声线索进行简短的跨感觉通道训练，比反向强度噪声训练或用原始任务进行再训练，能使视觉回避反应恢复得更好。用反向强度视觉线索进行训练会导致再学习缺陷。在第二项实验中，控制条件排除了再次暴露于测试环境、电击-反应关系和复合条件作用作为这些结果的可能解释。这些结果表明，大鼠在后皮质损伤后能够进行跨感觉通道转换，并且这种转换效应可以促进行为功能的恢复。还讨论了这些发现的临床意义。
