Fig. 3.

Cortical stimulation had a facilitatory effect on the late responses of homologous VPM units (n = 21). A: millisecond by millisecond VPM response difference to PD′ after CT stimulation (top), which reflected a profound facilitatory effect (green bins, difference > 0, meaning response increase after stimulation; bottom) in the majority of 1-ms bins rather than depression (red bins, difference < 0). B: for NPD′ responses, facilitation or depression of VPM responses occurred within individual 1-ms bins at chance levels.