ANTH 1001 Lecture Notes - Lecture 16: Anatomical Terms Of Motion, Gluteal Muscles, Lumbar Vertebrae

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29 Mar 2017
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Introduction to biological anthropology, week 11, lecture 16__ ** the word hominin refers exclusively to humans and our fossil relatives** What makes a hominin: major evolutionary novelties of humans. Long developmental period and long lifespan: mosaic evolution- different traits evolve at different points in time. Dentition: 2. 1. 2. 3 dental formula same as in all catarrhines, y-5 lower molar pattern, canine reduction. Canine size and shape is associated with differences in apes. Reduction of sexual dimorphism less male-male competition different social interactions: ape- u shaped dental arcade, large canines, broad incisors, human- parabolic dental arcade, smaller anterior teeth. Human- less facial prognathism, smaller, shorter mandible. Prognathism refers to how long the snout is. Suspensory locomotion & vertcal climbing: increased mobility of extremities, shoulder blade located on back, forelimbs elongated compared to hindlimbs, long and curved fingers for grasping branches. African apes have long upper limbs (inherited from an ancestor with suspensory locomotion) Humans have inherited these adaptations as well.

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