ラットにおける2つの型の回避学習に及ぼす海馬損傷の効果--活動的になることと不動になることの学習への効果

概要

論文の詳細を見る
Two experiments were conducted to study the effects of hippocampal lesions upon various behaviors of rats in both shock and shock-free situations. The main emphasis, however, was placed on the study of the effects of the lesion upon avoidance learning to be active and inactive. In Experiment I, partially hippocampectomized rats, as compared with the control rats, showed better performance in the avoidance task to be active, but groups did not differ in the avoidance task to be inactive. Having assumed that the latter result was due to the insensitivity of the stabilimeter device used to detect rat's movements, they were detected visually by an observer under a blind condition in Experiment II. Hippocampectomized rats were shown to be poorer than control rats in learning to avoid by being immobile. The results were discussed with reference to Issacson (1974) and Blanchard, Blanchard, Lee, and Fukunaga (1977). The results obtained in shock free situations did not differ significantly among groups. But there was some evidence showing the mean durations of freezing and immobility to be less per episode in hippocampectomized than control rats.
公益社団法人日本心理学会の論文