Sagvolden T
Brain Res. 1976 Jul 16;110(3):559-74. doi: 10.1016/0006-8993(76)90866-0.
The purpose of experiment 1 was to examine the relationship between shock intensity and normal rats' free-operant (Sidman) avoidance performance on a 3-component, multiple schedule. The results showed an inverted U-shaped relation between response rate and shock intensity, but no consistent relation between shock rate and shock intensity was found. Experiment 2 showed that lateral sptal lesions produced a bidirectional change in reactivity to electric shock. An increased reactivity was observed in the initial sessions starting on the 11th day after the surgery, while a reduced reactivity was observed in the final sessions when stable performance had been reacquired. These changes were not a function of the waning of general hyperreactivity with post-operative recovery: the septal lesions in this study did not produce any "sham rage". From 40 to 80% of the variance in response rates was accounted for by this bidirectional change in the reactivity to shock.
实验1的目的是研究电击强度与正常大鼠在三分量多重强化程序下的自由操作（西德曼）回避行为之间的关系。结果表明，反应率与电击强度呈倒U形关系，但未发现电击频率与电击强度之间存在一致关系。实验2表明，外侧隔区损伤对电击反应性产生双向变化。术后第11天开始的初始阶段观察到反应性增强，而在重新获得稳定表现的最后阶段观察到反应性降低。这些变化并非术后恢复过程中一般过度反应性减弱的结果：本研究中的隔区损伤未产生任何“假怒”现象。电击反应性的这种双向变化解释了40%至80%的反应率方差。
