FIG. 5.
Ventral root stimulation can attenuate reciprocal inhibition in PBSt MNs at P7. Renshaw cells were activated by stimulation of motor axons in the L3 and L4 ventral roots (VRs). A: the synaptic response from Q sensory axons in PBSt MNs (Q → PBSt) was attenuated by prior VR stimulation (VR + Q → PBSt), which is shown in red superimposed on the Q → PBSt response. VR stimulation alone did not elicit any response in PBSt MNs. B: variable attenuation of Q → PBSt synaptic potentials produced by prior L3 –L4 VR stimulation. Each point indicates the percent attenuation in one PBSt MN.