Figure 5.

Increase in excitability of the terminals of Ia inhibitory interneurones following GS stimulation

Raster display showing the occurrence of antidromic action potentials recorded extracellularly from a Ia inhibitory interneurone with (right panel) and without (left panel) conditioning GS stimulation (5 pulses, 30 ms before; 375 Hz). The action potentials were evoked by single intraspinal pulses of constant amplitude in the PBSt motor nucleus. Conditioned and unconditioned trials were alternated at 1 Hz.