ANTH 101 Lecture Notes - Lecture 10: Orrorin, Tugen Hills, Diastema
Document Summary
What is a hominid: complex material culture, larger brain size, advanced cognition, dentition. Parabolic vs parallel dental arcade: shape of jaw, humans are parabolic. Honing chewing: honing has large canine teeth, and a large diastema, humans are non honing. Sagittal crest ridge of bone running lengthwise along the skill, an attachment for chewing muscles: humans no longer, bipedalism. Humans have an s-shaped spine: helps aline center of gravity, acts as spring, distribution of weight, spine increases in size was it goes down, skull. Foramen magnum - where the spine meets the skull: centrally located so that people can look forward. Nuchal plane/crest - flat bony area at the rear of the foramen magnum where the neck muscles attach: horizontal, pelvis. Quadrupeds have a at and long pelvis. Humans are broad and bowl like: acts as a resting place for organs from gravity"s pull downward. Muscle attachments pulls bone up and in to help align center of gravity.
