Figure 5.

Dual current-clamp recordings demonstrated that single motoneuron inputs could drive firing in Renshaw cells. Voltage-clamp responses to spike trains are shown for two paired recordings in which the size of evoked currents was small (A) and another in which it was large (B). Respective dual current-clamp recordings showed spiking on the second pulse (and once on the fourth) for the first pair (C) and always on the first and third in the second pair (D). E, Group data showed a correlation in the scatter distribution of the probability of firing on the first spike against its corresponding EPSC.