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Supraorbital morphology and social dynamics in human evolution

2018-06Journal article Open access
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dc.contributor.authorGodinho, Ricardo Miguel
dc.contributor.authorSpikins, Penny
dc.contributor.authorO'Higgins, Paul
dc.date.accessioned2018-12-07T14:53:26Z
dc.date.available2018-12-07T14:53:26Z
dc.date.issued2018-06
dc.description.abstractUniquely, with respect to Middle Pleistocene hominins, anatomically modern humans do not possess marked browridges, and have a more vertical forehead with mobile eyebrows that play a key role in social signalling and communication. The presence and variability of browridges in archaic Homo species and their absence in ourselves have led to debate concerning their morphogenesis and function, with two main hypotheses being put forward: that browridge morphology is the result of the spatial relationship between the orbits and the brain case; and that browridge morphology is significantly impacted by biting mechanics. Here, we virtually manipulate the browridge morphology of an archaic hominin (Kabwe 1), showing that it is much larger than the minimum required to fulfil spatial demands and that browridge size has little impact on mechanical performance during biting. As browridge morphology in this fossil is not driven by spatial and mechanical requirements alone, the role of the supraorbital region in social communication is a potentially significant factor. We propose that conversion of the large browridges of our immediate ancestors to a more vertical frontal bone in modern humans allowed highly mobile eyebrows to display subtle affiliative emotions.
dc.identifier.doi10.1038/s41559-018-0528-0
dc.identifier.issn2397-334X
dc.identifier.urihttp://hdl.handle.net/10400.1/11513
dc.language.isoeng
dc.peerreviewedyes
dc.publisherNature Publishing Group
dc.relationHOMININ CRANIOFACIAL MORPHOLOGY AND DIET
dc.subjectMovement Coding System
dc.subjectFinite-Element-Analysis
dc.subjectHomo-Sapiens
dc.subjectProcessing Techniques
dc.subjectMasticatory-Stress
dc.subjectFacial Morphology
dc.subjectChimpanzee
dc.subjectModels
dc.subjectImpact
dc.subjectBiomechanics
dc.titleSupraorbital morphology and social dynamics in human evolution
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleHOMININ CRANIOFACIAL MORPHOLOGY AND DIET
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F76375%2F2011/PT
oaire.citation.endPage+
oaire.citation.issue6
oaire.citation.startPage956
oaire.citation.titleNature Ecology & Evolution
oaire.citation.volume2
person.familyNameGodinho
person.givenNameRicardo Miguel
person.identifier.ciencia-idE01A-0CC3-D631
person.identifier.orcid0000-0003-0107-9577
person.identifier.ridP-2263-2015
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
rcaap.typearticle
relation.isAuthorOfPublication51a54f2c-0a51-4f8d-8791-529ffb1610e4
relation.isAuthorOfPublication.latestForDiscovery51a54f2c-0a51-4f8d-8791-529ffb1610e4
relation.isProjectOfPublication904298c4-0d84-43e9-9eb5-db62be74a878
relation.isProjectOfPublication.latestForDiscovery904298c4-0d84-43e9-9eb5-db62be74a878

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