Abstract
Most primates include quadrupedalism in their locomotor repertoire. Though quadrupedalism is not as mechanically demanding as other locomotor behaviors—such as brachiation or vertical clinging and leaping—researchers have nonetheless identified morphological and biomechanical specializations associated with quadrupedal locomotion among primates. Features that vary among arboreal and terrestrial primates include morphological aspects of the limbs and tail, as well as hand and foot postures. Quadrupedal locomotion can be categorized into various types of symmetrical (walk, trot, pace, amble) or asymmetrical (bound, half‐bound, crutch‐walk, gallop, canter) gaits. In addition to their unusual preference for diagonal sequence, diagonal couplets (DSDC) walking gaits, primate quadrupeds use a set of distinctive kinematic and kinetic features during both symmetrical and asymmetrical gaits that are biomechanically advantageous in an arboreal environment, and which likely evolved as a response to an interaction among substrate diameter, orientation, and/or compliance.
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