Sensation was surgically abolished from the right forelimbs of 7 untrained monkeys by dorsal rhizotomy. All Ss nevertheless learned to flex the deafferented extremity in order to avoid shock in a trace-conditioning situation with view of the limb precluded. This constitutes a situation where new behavior was learned even though all peripheral feedback from the responding limb had been prevented. The phenomenon suggests that the learning and performance of movement can be mediated by central mechanisms that do not require the participation of the peripheral nervous system. (28 ref.) (PsycINFO Database Record (c) 2006 APA, all rights reserved). © 1965 American Psychological Association.