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Effects of age on feeding behavior and chemosensory processing in the pond snail, Lymnaea stagnalis

Arundell, Martin, Patel, B., Straub, V., Allen, M., Janse, C., Ohare, D., Parker, K.A., Gard, P. and Yeoman, M. (2006) Effects of age on feeding behavior and chemosensory processing in the pond snail, Lymnaea stagnalis Neurobiology of Aging, 27, (12), pp. 1880-1891. (doi:10.1016/j.neurobiolaging.2005.09.040).

Record type: Article

Abstract

This study used behavioral and electrophysiological techniques to examine age-related changes in the feeding behavior and chemosensory processing in the pond snail, Lymnaea stagnalis. Increasing age was associated with a 50% decrease in long-term food consumption. Analysis of short-term sucrose-evoked feeding bouts showed an age-related increase in the number of animals that failed to respond to the stimulus. Of the animals that did respond increasing age was associated with a decrease in the number of sucrose-evoked bites and a increase in the duration of the swallow phase. These changes were observed with both 0.01 and 0.05M sucrose stimuli but were not seen when 0.1M sucrose was used as the stimulus. Electrophysiological analysis of the chemosensory pathway in semi-intact lip-CNS preparations failed to demonstrate a significant change in the neuronal information entering the cerebral ganglia from the lips via the median lip nerve, but did demonstrate an age-related deficit in the neuronal output from the cerebral ganglia. This deficit was also dependent on the sucrose concentration and mirrored the concentration-dependent changes in feeding behavior. In summary, aging appeared to affect central but not peripheral processing of chemosensory information and suggests that this deficit contributes to the age-related changes in feeding behavior.

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More information

Published date: December 2006
Keywords: neuronal aging, central pattern generator, lymnaea, feeding, chemoreception

Identifiers

Local EPrints ID: 155853
URI: http://eprints.soton.ac.uk/id/eprint/155853
PURE UUID: 11ad1179-a774-4252-a082-b14e87de780b

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Date deposited: 24 Jun 2010 11:24
Last modified: 18 Jul 2017 12:44

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Contributors

Author: Martin Arundell
Author: B. Patel
Author: V. Straub
Author: M. Allen
Author: C. Janse
Author: D. Ohare
Author: K.A. Parker
Author: P. Gard
Author: M. Yeoman

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