Figure 5.

Phase of entrainment of rhythmic ThC-joint motoneuron activity by rhythmic stimulation of hindleg load sensors depends on walking direction. During backward walking (left), entrainment results in ProCx activity being in phase with caudal bending of the femur. In contrast, during forward walking (right), entrainment results in RetCx activity being in phase with caudal bending of the femur. Arrows at stippled vertical lines each denote one transition in activity of coxal motoneurons induced by CS stimulation in backward and forward walking.