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Journal of Experimental Biology 113,351-366 (1984)
Published by Company of Biologists 1984

Initiation of Feeding Motor Output by an Identified Interneurone in the Snail Lymnaea Stagnalis

C. R. MCCROHAN ¹

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

1. The cerebral ventral 1 (CV1) cells of Lymnaea are located in the cerebral ganglia, and have axonal projections to the buccal ganglia.

2. Maintained depolarization of a CV1 neurone leads to initiation, maintenance and modulation of rhythmic feeding motor output from buccal and cerebral ganglia.

3. The CV1 cells receive rhythmic synaptic inputs, in phase with feeding cycles, which probably originate from buccal rhythm-generating interneurones.

4. CV1 cells initiate feeding cycles independently of the buccal slow oscillator (SO) neurone, previously described. The possible roles of CV1 and SO are discussed.

Key words: Molluscan feeding, command neurone, motor rhythm

Accepted on May 10, 1984

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