A) The latency to fall from an accelerating rotarod increases over three consecutive trials. Motor learning is poor in DATdT-2w mice. For all panels, n=mice. B) The average latency to fall from the rotarod is reduced in DATdT-2w mice. C) Striatal DA content is depleted 12 hr following reserpine and is moderately reduced in DATdT-2w mice. D) ACh content is reduced in reserpine and DATdT-2w mice. E) The ACh/DA ratio is increased in DATdT-2w mice and rises further in reserpine mice. F) Latency to fall in control mice shows no correlation with striatal DA content, G) ACh content, or H) the ACh/DA ratio. Lines in panels F-K, linear regression. I) For DATdT-2w mice, the latency to fall positively correlates with striatal DA content and J) negatively correlates with ACh content and K) the ACh/DA ratio. L) The plot compares the latency to fall with DA content, M) ACh content, and N) the ACh/DA ratio. Bars, SE; &&p<0.01, 2-way rm-ANOVA.