01398nas a2200241   4500008004100000022001400041245006300055210006100118260001200179300001400191490000700205520074600212653001700958653001300975653001100988653001500999653001201014653001801026653001901044100002101063700002501084856004701109       1990                        eng d  a0165-027000aOperant conditioning of H-reflex in freely moving monkeys.0 aOperant conditioning of Hreflex in freely moving monkeys  c02/1990  a145–1520 v313 aThe H-reflex, the electrical analog of the stretch reflex or tendon jerk, is the simplest behavior of the primate CNS. It is subserved by a wholly spinal two-neuron reflex arc. Recent studies show that this reflex can be increased or decreased by operant conditioning, and that such conditioning causes plastic changes in the spinal cord itself. Thus, H-reflex conditioning provides a powerful new model for investigating primate memory traces. The key feature of this model, the conditioning task, originally required animal restraint. This report describes a new tether-based design that allows H-reflex measurement and conditioning without restraint. This design integrates the conditioning task into the life of the freely moving animal.10aconditioning10aH-Reflex10aMemory10aplasticity10aprimate10aspinal reflex10astretch reflex1 aWolpaw, Jonathan1 aHerchenroder, P., A.  uhttp://www.ncbi.nlm.nih.gov/pubmed/2319815