ANTH 1001 Chapter : Mosaic Evolution
Document Summary
A pattern of evolution in which the rates of evolution in one functional system vary from those in other systems. Stance phase (contact, midstance, propulsion) & swing phase (toe-off, heel strike) Habitual- in the bipedalism is standard and most efficient form of locomotion. We are obligate in that hominins cannot locomote efficiently in any other way. Nuchal plane: horizontal bypath , muscle attached to help brace. Short, broad pelvis: two innominate bones (os coxae) Femur & big toe in line with others. Energy efficiency and bipedalism: more efficient than traveling on all four, means of heat dissipation, drain blood, less surface of area. Ecological influences and bipedalism: expansion of grasslands in late miocene, ability to see. Dietary influences on bipedalism: better to stand upright in trees/ground.
