ABSTRACT
Flexion of the mero-carpal joint of the leg of a partially dissected Pro-cambarus 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 inter-ganglionic interneurone must be excited to activate the neuronal pathway which mediates the abdominal extension.
© 1982 by Company of Biologists
1982
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