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Title: A bivariate approach to the variation of the parietal curvature in the Genus Homo
Authors: Bruner, Emiliano
Cuétara, José Manuel de la
Holloway, Ralph L.
Keywords: Parietal bone;Parietal lobes;Paleoneurology;Human brain evolution
Issue Date: Sep-2011
Publisher: Wiley
Citation: The Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology, 2011, 294 (9), 1548-1556
Abstract: The parietal bones approximately cover the extension of the underlying parietal lobes. Although the boundaries of these two anatomical elements do not coincide, during morphogenesis the growth of the parietal bones is largely induced by the pressure exerted by the parietal lobes. Modern humans display larger parietal chords and arcs compared with non‐modern human species. However, the variation of these variables have not been analyzed before according to the covariation with the general endocranial diameters. When the curvature of the parietal bones is regressed onto the main neurocranial distances, modern humans show larger relative values, suggesting not only an absolute enlargement but a definite allometric change. Taking into account the morphogenetic relationships with the parietal lobes, these results further support previous hypotheses suggesting a relative enlargement of these cortical areas in Homo sapiens, by using simple and reliable homologous neurocranial arcs.
ISSN: 1932-8486
DOI: 10.1002/ar.21450
Type: Article
Appears in Collections:Paleobiología

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