ANTH 2301 Lecture Notes - Lecture 7: Foramen Magnum, Southeast Asia, Encephalization Quotient
7 Feb 2017
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Linnaean classification scheme: classification for humans: Characteristics of primates: four functionally distinct tooth types, they have retained all tooth types. Incisors, canines, premolars, molars: generalized limb structure (from postcranium down/from neck down) Rhinencephalon, turbinate bones: trend toward orthograde (upright) posture. Location of the foramen magnum: elaboration of the brain larger, more wrinkled. Encephalization quotient brain size/body size: tendency for single births other animals have litters, and our offspring are born more premature/immature so they must go through a learning process, live in social groups. In other animals, like cats, the muscles for chewing are connected to the muscles of the eye, this is not the case for primates, our chewing and visual mechanisms are separate. Strephsarinis have vertical clinging and leaping motions, they are mostly nocturnal. Haplarhrinis have the closure of the eyes and have a variety of locomotion functions and they are mostly diurnal. The size of orbits can reveal whether it is nocturnal or diurnal.
