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Origins of the Human Brain$
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Jean-Pierre Changeux and Jean Chavaillon

Print publication date: 1996

Print ISBN-13: 9780198523901

Published to Oxford Scholarship Online: March 2012

DOI: 10.1093/acprof:oso/9780198523901.001.0001

Brain, locomotion, diet, and culture: how a primate, by chance, became a man

Chapter:
(p. 104 ) 6 Brain, locomotion, diet, and culture: how a primate, by chance, became a man
Source:
Origins of the Human Brain
Author(s):

Yves Coppens

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198523901.003.0006

In demonstrating the stages on how a primate became a man, the chapter divides this into two steps. The first step is set about 8 million years ago, during the time of Australopithecus, the first representative of the family Hominidae. The brain of this species, which is considered to be the earliest, already had an expansion of the parietal association cortex and brain reorganization. Thus, this species adapted a new posture, new locomotor repertoire, and new diet. Also, for the first time, with stone tools as evidence, it can be assumed that the species had a culture. The second step is situated about 3 million years ago, the time of the Homo. Their brain is larger and with better drainage as compared to the skull of Australopithecus. This resulted to more bipedalism for locomotion, less vegetarian for their diet, and more progressive cultural environment.

Keywords:   Australopithecus, Homo, locomotor repertoire, bipedalism, parietal association cortex, posture, diet

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