Catwalk automated gait analysis test of tgHD and littermate control rats at two months of age. (A) Shows the swing speed of all limbs for tgHD (light) and control rats (dark). (B) Duration of paw contact of all limbs for tgHD and control rats. (C) Speed at which the limbs lose contact with the glass plate for tgHD and control rats. (D) Swing time of all limbs for tgHD and control rats. Data are shown as mean ± s.e.m. * p < 0.03.