Fig. 6. Segmental pitch displacements for single, representative cycles of the walk
(A,B), trot (C,D), and canter (E,F). Left column (A,C,E) depicts head
(H–S), neck (N–S) and trunk (T–S) pitch relative to space.
Right column (B,D,F) depicts pitch of the head relative to the neck
(H–N), the neck relative to the trunk (N–T) and the head relative
to the trunk (H–T). Negative values denote head angles below earth
horizontal (0 deg.). Thick horizontal lines depict support phases for the left
hind limb (LH), right hind limb (RH), left forelimb (LF) and right forelimb
(RF).