Effect of sensorimotor cortex stimulation on PTP of C–fiber EFPs.

<p>A, Schematic diagram of the experimental arrangement. B, averaged (n = 16) electrophysiological recordings obtained before (1), after 10 min (2), and after 20 min (3) of high-frequency stimulation of the SN in control conditions (black) and when the SN high-frequency stimulation was applied in parallel with high-frequency stimulation of the contralateral sensorimotor cortex (red). <b>C</b>, PTP temporal course of C–fiber EFPs after a stimulation train of 100 ms delivered to the SN alone (black symbols) and when the SN high-frequency stimulation was applied in parallel with high-frequency stimulation to the contralateral sensorimotor cortex (red symbols). The symbols outside the gray band are statistically different from the basal responses (Friedman test, p<0.05).