Allometric scaling of infraorbital surface topography in Homo

Maddux, Scott D.; Franciscus, Robert G.

doi:10.1016/j.jhevol.2008.10.003

Cited by 47 publications

(66 citation statements)

References 77 publications

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“…Additionally, our results indicate that through development the infraorbital plate and maxillary orbital margin become more anteriorly projecting. Consistent with previous studies (Maddux and Franciscus, 2009;Maddux, 2011;Freidline et al, 2012aFreidline et al, , 2013, our results show infraorbital surface orientation (i.e., parasagittal versus coronal), slope (i.e., posteroinferior versus anteroinferior), and topography (i.e., canine depression versus inflation) to be size related.…”

Section: Discussionsupporting

confidence: 92%

“…Thus from AGs 2 to 3 typical midfacial features in the Khoisan and Inuit become more pronounced: in the Inuit it is a larger and flatter, or more inflated, infraorbital region and for Khoisan it is a more anterolaterally projecting zygomatic and projecting inferior orbital margin. The differences in infraorbital topography between these two regional groups may be explained by differences in size, such that the smaller facial size of the Khoisan results in a more depressed surface topography (Maddux and Franciscus, 2009;Maddux, 2011;Freidline et al, 2012aFreidline et al, , 2013.…”

Section: Discussionmentioning

confidence: 99%

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Ontogenetic and static allometry in the human face: Contrasting Khoisan and Inuit

Freidline

Gunz

Hublin

2015

American J Phys Anthropol

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The amount and pattern of growth and development may not be shared between regional groups, indicating that a certain degree of flexibility is allowed for in order to achieve adult size. In early postnatal development the face is less constrained compared to other parts of the cranium allowing for greater evolvability. The early development of region-specific facial features combined with heterochronic differences in timing or rate of growth, reflected in differences in facial size, suggest different patterns of postnatal growth.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Ontogenetic and static allometry in the human face: Contrasting Khoisan and Inuit

Freidline

Gunz

Hublin

2015

American J Phys Anthropol

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“…For example, several features of the nasomaxillary region have been shown to scale allometrically with overall facial size, both in recent humans and across Homo (Holton and Franciscus, 2008;Maddux and Franciscus, 2009;Maddux, 2011). Accordingly, the prevalence of depressed nasal floors in these two archaic Eurasian samples may simply be related to both populations possessing similarly sized (large) faces.…”

Section: Discussionmentioning

confidence: 99%

Nasal floor variation among eastern Eurasian Pleistocene <i>Homo</i>

Maddux

Pan

et al. 2012

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A bi-level nasal floor, although present in most Pleistocene and recent human samples, reaches its highest frequency among the western Eurasian Neandertals and has been considered a feature distinctive of them. Early modern humans, in contrast, tend to feature a level (or sloping) nasal floor. Sufficiently intact maxillae are rare among eastern Eurasian Pleistocene humans, but several fossils provide nasal floor configurations. The available eastern Eurasian Late Pleistocene early modern humans have predominantly level nasal floors, similar to western early modern humans. Of the four observable eastern Eurasian archaic Homo maxillae (Sangiran 4, Chaoxian 1, Xujiayao 1, and Changyang 1), three have the bi-level pattern and the fourth is scored as bi-level/sloping. It therefore appears that bi-level nasal floors were common among Pleistocene archaic humans, and a high frequency of them is not distinctive of the Neandertals.

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“…For example, researchers have hypothesized that larger facial dimensions in archaic Homo are due, in part, to greater nasal cavity dimensions required to facilitate the necessary oxygen intake needed to maintain a larger body mass (Cartmill and Smith, 2009;Yokley et al, 2009;Froehle et al, 2013). Consequently, temporal patterns of facial size reduction in genus Homo (e.g., Trinkaus, 2003;Holton and Franciscus, 2008;Pearson, 2008;Maddux and Franciscus, 2009) may be tied, at least in part, to body mass reduction and reduced daily energy requirements.The potential influence of ventilatory demands on variation in nasal cavity size is difficult to test directly in 153:52-60 (2014) fossil hominins. However, understanding patterns of oxygen consumption and upper respiratory tract morphology in recent humans can be informative with regard to the influence of respiratory demands on nasal cavity size in archaic Homo.…”

mentioning

confidence: 99%

Ontogenetic scaling of the human nose in a longitudinal sample: Implications for genus Homo facial evolution

Holton

Yokley

Froehle

et al. 2013

American J Phys Anthropol

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Researchers have hypothesized that nasal morphology, both in archaic Homo and in recent humans, is influenced by body mass and associated oxygen consumption demands required for tissue maintenance. Similarly, recent studies of the adult human nasal region have documented key differences in nasal form between males and females that are potentially linked to sexual dimorphism in body size, composition, and energetics. To better understand this potential developmental and functional dynamic, we first assessed sexual dimorphism in the nasal cavity in recent humans to determine when during ontogeny male-female differences in nasal cavity size appear. Next, we assessed whether there are significant differences in nasal/body size scaling relationships in males and females during ontogeny. Using a mixed longitudinal sample we collected cephalometric and anthropometric measurements from n = 20 males and n = 18 females from 3.0 to 20.0+ years of age totaling n = 290 observations. We found that males and females exhibit similar nasal size values early in ontogeny and that sexual dimorphism in nasal size appears during adolescence. Moreover, when scaled to body size, males exhibit greater positive allometry in nasal size compared to females. This differs from patterns of sexual dimorphism in overall facial size, which are already present in our earliest age groups. Sexually dimorphic differences in nasal development and scaling mirror patterns of ontogenetic variation in variables associated with oxygen consumption and tissue maintenance. This underscores the importance of considering broader systemic factors in craniofacial development and may have important implications for the study of patters craniofacial evolution in the genus Homo.

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Allometric scaling of infraorbital surface topography in Homo

Cited by 47 publications

References 77 publications

Ontogenetic and static allometry in the human face: Contrasting Khoisan and Inuit

Ontogenetic and static allometry in the human face: Contrasting Khoisan and Inuit

Nasal floor variation among eastern Eurasian Pleistocene <i>Homo</i>

Ontogenetic scaling of the human nose in a longitudinal sample: Implications for genus Homo facial evolution

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