Hall G, Purves D, Bonardi C
Department of Psychology, University of York, England.
Behav Neurosci. 1996 Oct;110(5):933-45. doi: 10.1037//0735-7044.110.5.933.
The control exerted by contextual cues over classically conditioned responding was assessed for rats with electrolytic lesions of the dorsal hippocampus and sham-operated controls. In 3 experiments the rats received initial training with 2 reinforced cues, each presented in its own distinctive context, followed by a nonreinforced test in which the cues were presented in the other context. Both control and operated subjects showed context specificity, as evidenced by less vigorous responding to these cues than to cues presented on test in their original contexts. The groups did not differ in their ability to learn an explicit discrimination in which a given cue was reinforced in one context and nonreinforced in a different context (although the groups did differ on a simple autoshaping task). It is concluded that a special role for the hippocampus in the contextual control of conditioned responding still remains to be demonstrated.
对背侧海马体有电解损伤的大鼠和假手术对照组的大鼠，评估了情境线索对经典条件反应的控制作用。在3个实验中，大鼠首先接受了对2个强化线索的训练，每个线索都在其独特的情境中呈现，随后进行非强化测试，测试中线索在另一种情境中呈现。对照组和手术组的大鼠都表现出情境特异性，表现为对这些线索的反应不如在其原始情境中测试时呈现的线索那样强烈。两组在学习一种明确的辨别任务（即给定线索在一种情境中得到强化而在另一种情境中未得到强化）的能力上没有差异（尽管两组在一个简单的自动形成任务上存在差异）。得出的结论是，海马体在条件反应的情境控制中的特殊作用仍有待证明。
