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Journal of Experimental Biology 108,257-272 (1984)
Published by Company of Biologists 1984

Properties of Ventral Cerebral Neurones Involved in the Feeding System of the Snail, Lymnaea Stagnalis

C. R. MCCROHAN 1

1 Department of Zoology, University of Manchester Manchester, M13 9PL

Four identified neurone types (CV3, 7, 5 and 6), located in the ventral cerebral ganglia of Lymnaea stagnalis, are described. These cells have axonal projections in one or more of the nerves innervating the lips. In addition, they show rhythmic synaptic inputs leading to strong burst activity in phase with cyclic output from the buccal ganglia, suggesting a role in the control of the oral aperture during feeding. The innervation of lip muscle by one of the cell types (CV7) is confirmed electrophysiologically. The relationship of rhythmic activity in CV cells with that in the buccal feeding system is discussed.

Key words: Molluscan feeding, motor rhythm, identified neurones

Accepted on September 13, 1983






© The Company of Biologists Ltd 1984