著者

永野 茜

出版者

THE JAPANESE SOCIETY FOR ANIMAL PSYCHOLOGY

雑誌

動物心理学研究 (ISSN:09168419)

巻号頁・発行日

pp.68.1.2, (Released:2018-02-28)

参考文献数

28

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Many studies have reported that wild and captive nonhuman primates have an advanced ability to understand causal relationships and use tools. However, the only studies investigating physical causal understanding in rodents under controlled experimental settings has been conducted in degus. The present studies conducted tool-use tasks in rats in an experimental setting, similar to tasks conducted in nonhuman primates and birds, and we used newly developed tasks to investigate their ability for physical causal understanding. In these tasks, rats were required to use tools to obtain food beyond their reach. Research 1 showed that rats chose appropriate tools to obtain food even when two novel tools were presented. In addition, Research 2 showed that rats were able to manipulate a tool according to the position of food. Our studies first suggest that rats have a primitive ability to understand physical causal relationships between pulling tools and approaching food. We propose the rat as an animal model to shed light on the evolution of physical causal understanding from rodents to humans.

著者

大北 碧 永野 茜 領家 梨恵

出版者

THE JAPANESE SOCIETY FOR ANIMAL PSYCHOLOGY

雑誌

動物心理学研究 (ISSN:09168419)

巻号頁・発行日

vol.73, no.2, pp.33-34, 2023 (Released:2023-12-25)

参考文献数

3

著者

永野 茜 奥村 紗音美 青山 謙二郎 上北 朋子

出版者

公益社団法人 日本心理学会

雑誌

心理学研究 (ISSN:00215236)

巻号頁・発行日

vol.86, no.6, pp.603-609, 2016

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Previous studies have reported that lesions of the orbitofrontal cortex (OFC) in rats induce impulsive choices in delayed reinforcement tasks.<b> </b>However, some studies have suggested that the OFC is not related to impulsivity but instead to compulsivity.<b> </b>In this study, we investigated the effects of OFC lesions on choice in a T-maze.<b> </b>First, 14 rats were trained to discriminate spatially between a high-reward arm with a delay of 15 seconds and a low-reward arm without a delay.<b> </b>The high-reward arm contained 10 food pellets, whereas the low-reward arm contained only one pellet.<b> </b>In the presurgery test, all rats chose the high-reward arm in most trials.<b> </b>In the postsurgery test, both OFC lesioned (<i>n</i> = 7) and control (sham-lesioned and intact; <i>n</i> = 7) rats continued to choose the high-reward arm in most trials.<b> </b>Following the postsurgery test, the high- and low-reward arms were reversed.<b> </b>In the reversal test, OFC lesioned rats made significantly fewer high-reward choices than did control rats.<b> </b>These results indicate that OFC lesions induced compulsive choices rather than impulsive choices.