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Fig. 6. Polar plots of substrate reaction force vectors in the frontal plane. Each
arrow represents an individual reaction force with the arrow length
representing its magnitude in body weight (BW) units, and arrow orientation
its deviation from vertical. SRF vectors leaning medially have negative
angles, those leaning laterally have positive angles. E. patas
forelimb (A), L. catta forelimb (B), E. patas hindlimb (C),
L. catta hindlimb (D).