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Fig. 4. Representative substrate reaction force (SRF) profiles from the terrestrial
and arboreal trackways (speed indicated on each plot). (A,B) Fore limb and
hind limb arboreal trials. (C,D) Typical terrestrial trials for the fore limb
and hind limb. (E,F) Slow terrestrial fore limb and hind limb trials with
double-peaked vertical force traces. Negative craniocaudal forces indicate a
braking effort and positive indicates propulsion. Negative mediolateral force
designates a medially directed SRF (laterally directed limb force) and
positive designates a medially directed limb force. For clarity, craniocaudal
force is shown in gray.