COLUMBIA, Missouri, Jan. 25 (TNSres) -- The University of Missouri issued the following news release: * * * A new study shows specific changes in the brain after muscle disuse that are linked with cognitive decline. * * * Whenever 27-year-old Nathan Kerr stops by the office of his 81-year-old mentor Frank Booth, Kerr often finds Booth running on a treadmill. "You're not going to find someone with more enthusiasm for what they do than Frank," said Kerr, a postdoctoral fellow at the Universit more PR