Fig. 7.

Antidromic activation of motoneurons does not depress VLF-evoked potentials recorded from the stimulated ventral root. The graph plots the normalized amplitude of the VLF-evoked potentials recorded from the LS1 ventral root before and after antidromic stimulation of the LS1 ventral root (Antidromic) and before and after the occurrence of a spontaneous episode (Spontaneous). Also shown on the same time scale are the fluorescence changes recorded simultaneously from LS1 motoneurons back-filled with calcium green dextran.