Effect of successive ablation of fCS and trCS on ThC-joint motoneuron activity in pilocarpine-induced rhythmic preparations in the middle leg (N = 3; the numbers on top of the bars give the sample size). In three animals (exp.# 1–3), the influence of the bending of the femur persisted after removal of the fCS (A). In these same animals, the reflex vanished after additional removal of the trCS (B). In A and B, the vertical solid and dotted lines indicate the mean ± SD from seven control experiments in which all CS were intact. The abscissa indicates the frequency of occurrence for transitions in switching from ProCx to RetCx activity induced by the CS stimulation. C, Effect of ablation of trCS only on ThC-joint motoneuron activity in pilocarpine-induced rhythmic preparations in the middle leg (N = 3). In all three animals (exp.# 4–6), the influence of the bending of the femur was strongly decreased after removal of the trCS.