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ISSN : 1226-9654

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Acquisition and Extinction of Classical Trace Conditioned Responses in Rabbits with Hippocampal Lesions

The Korean Journal of Cognitive and Biological Psychology / The Korean Journal of Cognitive and Biological Psychology, (P)1226-9654; (E)2733-466X
1989, v.1, pp.57-65
Hye-Kyeong Kim (Korea University)
Ki-Suk Kim (Korea University)
Kim, H., & Kim, K. (1989). Acquisition and Extinction of Classical Trace Conditioned Responses in Rabbits with Hippocampal Lesions. The Korean Journal of Cognitive and Biological Psychology, 1, 57-65.

Abstract

Effects of hippocampal lesions on the acquisition and extinction of classical trace conditioned responses were examined using the rabbit nictitating membrane preparation. After the lesion, rabbits received trace conditioning for 7 days and then were given extinction sessions for 3 days. During the trace conditioning, hippocampal lesion had no effect on the acquisition of response and onset latency. During extinction, however, the hippocampal lesioned rabbits showed significantly more responses than those of the sham-operated ones. And the lesioned showed no change in mean response latency, while the sham-operated exhibied progressive increase in the latency. The results suggest that hippocampus is not necessary for trace conditioning but involved in extinction process. Discussion was made within the context of the temporal processing approach which involves the hippocampus in attention process that enables the organism to learn to ignore irrelevant stimuli.

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Submission Date
1989-10-20
Revised Date
1989-11-13
Accepted Date

The Korean Journal of Cognitive and Biological Psychology

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