The Social Science Library » The Human Brain Evolving: A Personal Retrospective

The Human Brain Evolving: A Personal Retrospective

Author(s)	Holloway, Ralph L.
Abstract	Minor controversies notwithstanding, the evolution of the human brain has been an intermingled composite of allometric and nonallometric increases of brain volume and reorganizational events such as the reduction of primary visual cortex and a relative increase in both posterior association and (most probably) prefrontal cortex, as well as increased cerebral asymmetries, including Broca’s and Wernicke’s regions, with some of these changes already occurring in australopithecine times. As outlined in Holloway (1967), positive feedback (amplification-deviation) has been a major mechanism in size increases. Exactly how this mélange of organs evolved will require many more paleontological discoveries with relatively intact crania, an unraveling of the genetic bases for both brain structures and their relationship to behaviors, and a far more complete picture of how the brain varies between male and female and among different populations throughout the world. After all, the human brain is still evolving, but for how long is quite uncertain.
IssueNo
Pages	1-19
Article	Access to Article
Source	Annual Review of Anthropology
VolumeNo	37
PubDate	2008
ISBN_ISSN
Browse Path(s)	Anthropology —-Biological/Physical Anthropology ——–Neuroanthropology

The Human Brain Evolving: A Personal Retrospective