Fig.1

                (a) A thalamic cat walking on the treadmill and (b) Gaits of a thalamic cat of normal locomotion (i), and in early adaptation (ii) and in late adaptation (iii) of split-belt locomotion (revised by authors from [Yanagihara et al. Neuro. Res., 1993]). The LF is on the fast-belt, and the speed ratio (fast belt speed/slow belt speed) is 1.69 in split-belt locomotion. The red and blue empty circle mean the center of the stance phase (COST) of the fast-leg (fst) and the slow-leg (slw), respectively. The red and blue solid bullet mean the center of the single support phase (COSS) of the fast-leg and the slow-leg, respectively. DBCC is the normalized difference between times of COSS and COST. We call the bisupport phase starting on touch-down (TD) of slow-leg and terminating on lift-off (LO) of fast-leg as B1, and the bisupport phase starting on TD of fast-leg and terminating on LO of slow-leg as B2.