Locomotion how one normally moves Humans are bipedal walk on two limbs They are unique among the primates for normally using this form of locomotion The foot is very specialized for walking bipedally National Geographic 1993 Terrestrial quadruped On ground walks on four limbs Note the palms are down Turnbaugh et al 1993 172 Arboreal quadruped Note that the spider monkey has a prehensile grasping tail found Northern woolly spider monkey from Brazil only among some New World Feder Park 2001 115 monkeys Vertical Clinging and Leaping Photo of tarsier Feder Park 2001 114 Brachiation swinging from the arms Turnbaugh et al 1993 174 Knuckle walking upper body is semi erect orthograde posture quadrupedal walking using knuckles Chimpanzee Turnbaugh et al 1993 198 Gorilla Turnbaugh et al 1993 175
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