Synaptogenesis and FOS Expression in the Motor Cortex of the Adult Rat after Motor Skill Learning

This work was supported by National Institutes of Health Grants AG10154, MH40631, MH35321, the Kiwanis, the Retirement Research Foundation, and a Natural Science and Engineering Research Council of Canada fellowship. We thank David Ballard, Kara Federmeier, and Kapil Vij for assistance in training the animals and printing the micrographs; the Beckman Institute Optical Visualization Facility for use of its stereology system; the University of Illinois Center for Electron Microscopy for the use of its facilities; and Theresa Jones and Rodney Swain for their comments on this manuscript.

Correspondence should be addressed to William T. Greenough, Beckman Institute, University of Illinois, 405 North Mathews Avenue, Urbana, IL 61801.