Winnerless competition between sensory neurons generates chaos: A possible mechanism for molluscan hunting behavior

Chaos
Pablo VaronaY I Arshavsky

Abstract

In the presence of prey, the marine mollusk Clione limacina exhibits search behavior, i.e., circular motions whose plane and radius change in a chaotic-like manner. We have formulated a dynamical model of the chaotic hunting behavior of Clione based on physiological in vivo and in vitro experiments. The model includes a description of the action of the cerebral hunting interneuron on the receptor neurons of the gravity sensory organ, the statocyst. A network of six receptor model neurons with Lotka-Volterra-type dynamics and nonsymmetric inhibitory interactions has no simple static attractors that correspond to winner take all phenomena. Instead, the winnerless competition induced by the hunting neuron displays hyperchaos with two positive Lyapunov exponents. The origin of the chaos is related to the interaction of two clusters of receptor neurons that are described with two heteroclinic loops in phase space. We hypothesize that the chaotic activity of the receptor neurons can drive the complex behavior of Clione observed during hunting. (c) 2002 American Institute of Physics.

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Citations

Dec 26, 2003·Comptes rendus biologies·Henri Korn, Philippe Faure
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Dec 24, 2011·PLoS Computational Biology·Izzet B Yildiz, Stefan J Kiebel
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