Action des substances inhibitrice et trophique sur les cycles sécrétoires des neurones de la chaîne nerveuse ventrale au cours de la régénération chez Eisenia foetida Sav. f. typica (Annélide, Oligochète)

Abstract

The injection of a specific inhibitory substance, of cephalic origin for anterior regeneration, or of caudal origin for posterior regeneration, modifies the course of the secretory cycle of FP + cells of the nevous chain. This disturbance appears as a more or less visible lengthening of the duration of the phases of the cycle; thus, it provokes an important slackening of the regeneration. The administration of trophic substance of caudal origin during cephalic regeneration modifies the secretory cycle completely by suppressing a loading phase of the FP + neurones. On the contrary, the trophic substance of cephalic origin has almost no action upon caudal regeneration.