SOMATOSENSORY SYSTEMS, PAINIpsilateral and contralateral transfer of tactile learningHarris, Justin A.1; Diamond, Mathew E.2,3,4Author Information 1School of Psychology, University of New South Wales, Sydney, Australia 2Cognitive Neuroscience Sector, International School for Advanced Studies, Via Beirut 2-4, 34014 Trieste, Italy 3Department of Biomedical Sciences and Technologies, University of Udine, Italy 4Corresponding Author and Address: Mathew E. Diamond, Cognitive Neuroscience Sector, International School for Advanced Studies, Via Beirut 2-4, 34014 Trieste, Italy Received 22 October 1999; accepted 7 November 1999 Acknowledgements: The authors thank Rasmus Petersen for comments on an earlier draft of this manuscript. This research was supported by grants from the Australian Research Council, the Whitehall Foundation, the NIH, and the Telethon Foundation. All experimental procedures were approved by the Animal Care and Ethics Committee of the University of New South Wales. NeuroReport: February 7, 2000 - Volume 11 - Issue 2 - p 263-266 Buy Abstract We examined the spatial organization of perceptual learning in a cortex-dependent task. Rats learned a tactile task using four whiskers on one side of the snout, all others being clipped. These trained whiskers were then clipped and prosthetic whiskers were attached. Subsequent performance was found to be determined by the location of the prosthetic whiskers. There was partial transfer of learning to neighbouring whisker positions. In addition, there was partial transfer of learning to whisker positions on the other side of the snout, but only if the prosthetic whiskers were symmetrically opposite the trained whiskers. These findings suggest that neural changes underlying perceptual learning are distributed according to the topographic organization of the sensory cortical map. © 2000 Lippincott Williams & Wilkins, Inc.