ANTHROP 2200 Lecture Notes - Lecture 12: Arboreal Locomotion, Scapula, Brachiation
7 Apr 2017
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Learn the five types of locomotion: vertical clinging and leaping, arboreal quadrupedalism, terrestrial quadrupedalism. *do not need to know anatomical features for exam* Most common form of locomotion in primates. Less dangerous than leaping for large primates. Built for balance: forelimbs and hindlimbs more equal length and thin, lateral scapula keeps arms at side, flexed (bent) limbs keep center of gravity low, grasping feet, long tails help keep balance, terrestrial quadrupedalism. Movement on four legs on the ground. Old world monkeys with large bodies, as well as some of great ape locomotion. Limbs are equal length: thick, long, restricted joint makes shoulder strong. Short digits and tail bc not grasping branches. Walk on back of intermediate phalanges: fingers tucked under hands, allows for climbing, suspensory locomotion. Use limbs (arms and legs) to swing between tree branches. Allows large primates to quickly move across branches too weak to. Spider monkeys, gibbons, siamangs, orangutans support them.
