01400nas a2200253   4500008004100000022001400041245007800055210006900133260001200202300001400214490000700228520067600235653002200911653001300933653001300946653001100959653002500970653001500995653003501010653001801045100002101063700001501084856004701099       1988                        eng d  a0013-469400aOperant conditioning of primate spinal reflexes: effect on cortical SEPs.0 aOperant conditioning of primate spinal reflexes effect on cortic  c04/1988  a398–4010 v693 aPrevious studies have demonstrated operant conditioning of the primate spinal stretch reflex (SSR) and of its electrical analog, the H-reflex. We studied the evoked potential recorded over primary somatosensory cortex (SEP) which accompanies the H-reflex to determine whether the initial cortical response changes in the course of conditioned H-reflex change. When H-reflex amplitude changed, SEP amplitude also changed, but only half as much as the H-reflex. The results indicate that, while operant conditioning of the H-reflex has its largest effect on the spinal pathway of the reflex, it also has some effect on supraspinal pathways of the initial cortical response.10acortical response10aH-Reflex10aLearning10aMemory10aoperant conditioning10aplasticity10asomatosensory evoked potential10aspinal reflex1 aWolpaw, Jonathan1 aDowman, R.  uhttp://www.ncbi.nlm.nih.gov/pubmed/2450739