BIOLOGY 1M03 Lecture Notes - Lecture 10: Foramen Magnum, Pelvic Floor, Prognathism
14 Sep 2016
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Document Summary
Humans have a long juvenile period (parental care) Spoken language arrival can be found by looking at the pharynx of humans. Hominids evolved by diverging from the lineage that gave rise to chimps and bonobos. Shift of the foramen magnum to underneath of the skull is an evolution of bipedalism. Prognathism: the amount the mouth protrudes out in comparison to the nose. Transition between the primitive features and the modern features: ancestral features (primitive, derived features (modern features) Change in the bones associated with walking. Appearance of new fossils associated with the hominids lineage. Transition from quadripedal/hindlimb motion to suspensory locomotion: fingers became long and hook like, increase in mobility, pelvic floor: a set of musculature which influences how the body is supported, a transition to a more upright gate. Eventually coupled with bipedalism evolution: chimpanzee is a knuckle walker. Discovered by mary leekey who is an anthropologist. A set of 3 footprints from 3 individuals.
