@article {3171, title = {The volitional nature of the simplest reflex.}, journal = {Acta neurobiologiae experimentalis}, volume = {53}, year = {1993}, pages = {103{\textendash}111}, abstract = {Recent studies suggest that none of the behaviors of the vertebrate CNS are fixed responses incapable of change. Even the simplest reflex of all, the two-neuron, monosynaptic spinal stretch reflex (SSR), undergoes adaptive change under appropriate circumstances. Operantly conditioned SSR change occurs gradually over days and weeks and is associated with a complex pattern of CNS plasticity at both spinal and supraspinal sites.}, keywords = {behavior, Brain, conditioning, human physiology, Learning, Memory, motoneuron, nature, primate, Reflex, Spinal Cord, spinal site, supra spinal site, vertebrate}, issn = {0065-1400}, url = {http://www.ncbi.nlm.nih.gov/pubmed/8317238}, author = {Jonathan Wolpaw and Jonathan S. Carp} }