Fig. 4. Mean angular movements of intervertebral movements of the pika Ochotona rufescens in the gallop (A; N=5) and the gray short-tailed opossum Monodelphis domestica in the half-bound (B; N=6). The different presacral intervertebral joints (PS) are indicated by different colors. The footfall pattern of the hindlimbs is indicated by the ground contact duration (stance phase) on the top of each diagram.