ANTH 1210 Lecture Notes - Lecture 26: Shoulder Joint, Brachiation, Quadrupedalism

• School: University of Manitoba
• Department: Anthropology
• Course: ANTH 1210
• Professor: Haskel J.Greenfield

Document Summary

Movement range is related to living in a complex, tangled environment (where movement from one position to the next may entail or a combination of postures) . Each species usually relieves more heavily on a particular type . May also represent an evolutionary sequence of locomotion in primates . Can move quickly on all 4"s along tree branches. Ex: tree shrew bones and forearms are linked by mobile joints, 5 clawed digits, long and flexible tail for balance, short forelimbs compared to hindlimbs. Lose claws and developed nails (universal primate adaptation to climb) Includes some lemurs, south american monkeys, and old world monkeys. Primitive patterns: thorax is narrow, long tail for balance, joints of the upper limbs are mobile, and digits are long and prehensile. New patterns: limbs are equal length, trunk is held horizontal (parallel to ground), shoulder joint allow some lateral motion. Trend toward less quadrupedalism (use arms more than legs)