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Developmental Study of Anatomical Substrate for Conditioned Taste Aversion in Lymnaea stagnalis

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Title: Developmental Study of Anatomical Substrate for Conditioned Taste Aversion in Lymnaea stagnalis
Authors: Sadamoto, Hisayo Browse this author
Yamanaka, Mari Browse this author
Hatakeyama, Dai Browse this author
Nakamura, Hiroshi Browse this author
Kojima, Satoshi Browse this author
Yamashita, Masakane Browse this author
Ito, Etsuro Browse this author
Issue Date: Mar-2000
Publisher: 日本動物学会
Journal Title: Zoological Science
Volume: 17
Issue: 2
Start Page: 141
End Page: 148
Abstract: The pond snail, Lymnaea stagnalis, is a useful preparation for analyzing the commonality between development and learning. To promote this analysis, the anatomical substrate should be provided upon which learning is superposed during development. Because we previously demonstrated that L. stagnalis change their ability of conditioned taste aversion (CTA) as a long-term memory from veliconcha embryos to immatures, we examined in the present study the numbers of cells and the volume of the buccal and cerebral ganglia in the snails at the critical developmental stages. The buccal and cerebral ganglia include the majority of neurons involved in the CTA. We found that the numbers of cells in these ganglia are almost saturated in the immatures, but the volumes of these ganglia still increase from the immatures to the adults. These results suggested that most of the cells indispensable to the CTA emerge at the immature stage, but that individual cells in the ganglia continue to enlarge even in adulthood. Furthermore, the key neuron for the CTA was found to mature at the immature stage. The present study provided the anatomical substrate upon the long-term CTA, by which snails can eat safe food in a wide territory.
Rights: (c) 日本動物学会 / 本文献の公開は著者の意思に基づくものである
Type: article
Appears in Collections:生命科学院・先端生命科学研究院 (Graduate School of Life Science / Faculty of Advanced Life Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 山下 正兼

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