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Journal of Experimental Biology 99,339-347 (1982)
Published by Company of Biologists 1982

Abdominal Motoneurone Responses Elicited by Flexion of a Crayfish Leg

CHARLES H. PAGE 1 and KENNETH A. JONES 1

1 Department of Physiology and Bureau of Biological Research, Rutgers University, Piscataway, NJ 08854

Flexion of the mero-carpal joint of the leg of a partially dissected Procambarus initiated an intersegmental reflex in the superficial extensor (SEMNs) and flexor (SFMNs) abdominal motoneurones. When flexion induced a full extension of the abdomen, as in intact crayfish, there was a discharge of the 5 SEMN exciters and the SFMN peripheral inhibitor throughout the extension. The extension antagonists – the SEMN peripheral inhibitor and the five SFMN exciters – discharged one or two spikes immediately following the stimulus, which suggests that more than one interganglionic interneurone must be excited to activate the neuronal pathway which mediates the abdominal extension.

Submitted on January 8, 1982
Accepted on March 16, 1982






© The Company of Biologists Ltd 1982