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First published online May 30, 2008
Journal of Experimental Biology 211, 1841-1849 (2008)
Published by The Company of Biologists 2008
doi: 10.1242/jeb.018028
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Redundancy of olfactory sensory pathways for odor-aversion memory in the terrestrial slug Limax valentianus

Miki Yamagishi, Etsuro Ito and Ryota Matsuo*

Laboratory of Functional Biology, Kagawa School of Pharmaceutical Sciences, Tokushima Bunri University, Shido, Sanuki, Kagawa 769-2193, Japan

* Author for correspondence (e-mail: matsuor{at}kph.bunri-u.ac.jp)

Accepted 1 April 2008

Terrestrial slugs have the ability to learn and remember a food odor paired with an aversive stimulus. Olfaction in slugs involves the tips of two pairs of tentacles, the superior and the inferior tentacles. Sensory nerves in both pairs of the tentacles transmit olfactory information to the structure in the CNS, the procerebrum where learning and memory formation occur. We investigated the role of each pair of tentacles in odor-aversion learning, and examined the ability of slugs to recall memory after selective surgical amputation. Our results show that memory formation was not altered by the amputation of either one of the pairs before or after odor-aversion learning, while the odor sensibility of the slugs was maintained. These data suggest that either pair of tentacles is sufficient for the acquisition and retrieval of aversive olfactory memory.

Key words: Limax, odor-aversion learning, associative memory, superior tentacle, inferior tentacle


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This article has been cited by other articles:


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S. Watanabe, Y. Kirino, and A. Gelperin
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Learn. Mem., August 26, 2008; 15(9): 633 - 642.
[Abstract] [Full Text] [PDF]


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