A neonatal perspective on Homo erectus brain growth

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dc.contributor.authorCofran, Zachary
dc.contributor.authorDeSilva, Jeremy M.
dc.creatorZachary, Cofran
dc.date.accessioned2017-12-15T06:12:27Z
dc.date.available2017-12-15T06:12:27Z
dc.date.issued2015-04-01
dc.description.abstractAbstract The Mojokerto calvaria has been central to assessment of brain growth in Homo erectus, but different analytical approaches and uncertainty in the specimen's age at death have hindered consensus on the nature of H. erectus brain growth. We simulate average annual rates (AR) of absolute endocranial volume (ECV) growth and proportional size change (PSC) in H. erectus, utilizing estimates of H. erectus neonatal ECV and a range of ages for Mojokerto. These values are compared with resampled ARs and PSCs from ontogenetic series of humans, chimpanzees, and gorillas from birth to six years. Results are consistent with other studies of ECV growth in extant taxa. There is extensive overlap in PSC between all living species through the first postnatal year, with continued but lesser overlap between humans and chimpanzees to age six. Human ARs are elevated above those of apes, although there is modest overlap up to 0.50 years. Ape ARs overlap throughout the sequence, with gorillas slightly elevated over chimpanzees up to 0.50 years. Simulated H. erectus PSCs can be found in all living species by 0.50 years, and the median falls below the human and chimpanzee ranges after 2.5 years. H. erectus ARs are elevated above those of all extant taxa prior to 0.50 years, and after two years they fall out of the human range but are still above ape ranges. A review of evidence for the age at death of Mojokerto supports an estimate of around one year, indicating absolute brain growth rates in the lower half of the human range. These results point to secondary altriciality in H. erectus, implying that key human adaptations for increasing the energy budget of females may have been established by at least 1 Ma.en_US
dc.identifierDOI:10.1016/j.jhevol.2015.02.011
dc.identifier.citationZachary Cofran, Jeremy M. DeSilva, A neonatal perspective on Homo erectus brain growth, In Journal of Human Evolution, Volume 81, 2015, Pages 41-47en_US
dc.identifier.issn00472484
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0047248415000445
dc.identifier.urihttp://nur.nu.edu.kz/handle/123456789/2940
dc.language.isoenen_US
dc.publisherJournal of Human Evolutionen_US
dc.relation.ispartofJournal of Human Evolution
dc.rights.licenseCopyright © 2015 Elsevier Ltd. All rights reserved.
dc.subjectLife historyen_US
dc.subjectResamplingen_US
dc.subjectSimulationen_US
dc.titleA neonatal perspective on Homo erectus brain growthen_US
dc.typeArticleen_US
elsevier.aggregationtypeJournal
elsevier.coverdate2015-04-01
elsevier.coverdisplaydateApril 2015
elsevier.endingpage47
elsevier.identifier.doi10.1016/j.jhevol.2015.02.011
elsevier.identifier.eid1-s2.0-S0047248415000445
elsevier.identifier.piiS0047-2484(15)00044-5
elsevier.identifier.pubmedid25771994
elsevier.identifier.scopusid84926197515
elsevier.openaccess0
elsevier.openaccessarticlefalse
elsevier.openarchivearticlefalse
elsevier.startingpage41
elsevier.teaserThe Mojokerto calvaria has been central to assessment of brain growth in Homo erectus, but different analytical approaches and uncertainty in the specimen's age at death have hindered consensus on the...
elsevier.volume81
workflow.import.sourcescience

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