Figure 5.

Both (a) the hindlimb-initiated horse-like gallop and (b) the forelimb-initiated cheetah-like gallop are used by the dog. It is interesting to note that the dog can use the rotary footfall pattern for both types of gallop. This suggests that the type of downward to upward transition used does not depend on the rotary versus transverse distinction. Drawings of dogs are based on photos from Muybridge (1887). Net impulse vectors of each limb (black arrows) of the forelimb-initiated canine gallop are estimated from Walter & Carrier (2007). Net impulse vectors for (a) the hindlimb-initiated horse-like gallop are expected to parallel those of the horse (figure 2a).