Neuronal mechanisms underlying behavioral switching in a pteropod mollusc

Huang, Z. J., Satterlie, R. A. (1990) Neuronal mechanisms underlying behavioral switching in a pteropod mollusc. Journal of Comparative Physiology - A Sensory, Neural, and Behavioral Physiology, 166 (6). pp. 875-887. ISSN 03407594 (ISSN)

URL: http://link.springer.com/article/10.1007/BF0018733...
DOI: 10.1007/BF00187335

Abstract

In the pteropod mollusc Clione limacina, wing retraction takes precedence over spontaneous and continuous swimming, a phenomenon here defined as behavioral switching. The wing retraction system is organized as a simple reflex in which wing mechanoreceptors activate a pair of retraction interneurons which in turn excite at least two pairs of retraction motoneurons. Activation of individual mechanoreceptors does not inhibit swimming or trigger wing retraction. A pair of retraction interneurons can fully suppress swimming when induced to fire at physiological frequencies, and may be both sufficient and necessary for swim inhibition. Retraction interneurons monosynaptically inhibiit both swim interneurons and swim motoneurons. Retraction motoneurons inhibit swim motoneurons through a polysynaptic pathway. A model summarizing the neural circuity underlying behavioral switching in Clione is presented. A comparison of this model with the behavioral choice model in Pleurobranchea reveals that the overall neural mechanisms for behavioral choice and behavioral switching are similar as both involve dual function interneurons that not only activate their own motor pathway, but also inhibit the competing motor system. While inhibition is biased toward the afferent side of the competing circuit in behavioral choice, it is biased to the efferent side in behavioral switching.

Item Type: Paper
Uncontrolled Keywords: animal experiment article behavior modification forelimb neurophysiology nonhuman reflex swimming Animalia Clione Clione limacina Limacina Mollusca Pteropoda
Subjects: organism description > animal behavior
organs, tissues, organelles, cell types and functions > cell types and functions > cell functions
organs, tissues, organelles, cell types and functions > tissues types and functions > neural networks
neurobiology
organs, tissues, organelles, cell types and functions > cell types and functions > cell types > neurons
organs, tissues, organelles, cell types and functions > cell types and functions > cell types > neurons
organs, tissues, organelles, cell types and functions > cell types and functions > cell types > neurons
CSHL Authors:
Communities: CSHL labs > Huang lab
Depositing User: CSHL Librarian
Date Deposited: 10 Apr 2012 18:13
Last Modified: 10 May 2013 19:22
URI: http://repository.cshl.edu/id/eprint/25798

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