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3D enamel profilometry reveals faster growth but similar stress severity in Neanderthal versus Homo sapiens teeth

McGrath, Kate, Limmer, Laura Sophia, Lockey, Annabelle-Louise, Guatelli-Steinberg, Debbie, Reid, Donald J., Witzel, Carsten, Bocaege, Emmy, McFarlin, Shannon C., El Zaatari, Sireen (2021) 3D enamel profilometry reveals faster growth but similar stress severity in Neanderthal versus Homo sapiens teeth. Scientific Reports, 11 . Article Number 522. E-ISSN 2045-2322. (doi:10.1038/s41598-020-80148-w) (KAR id:85377)

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Early life stress disrupts growth and creates horizontal grooves on the tooth surface in humans and other mammals, yet there is no consensus for their quantitative analysis. Linear defects are considered to be nonspecific stress indicators, but evidence suggests that intermittent, severe stressors create deeper defects than chronic, low-level stressors. However, species-specific growth patterns also influence defect morphology, with faster-growing teeth having shallower defects at the population level. Here we describe a method to measure the depth of linear enamel defects and

and other systems, with some researchers suggesting that they experienced more severe childhood stress. Our results suggest that Neanderthals have shallower features than H. sapiens from the Upper Paleolithic, Neolithic, and medieval eras, mirroring the faster growth rates in Neanderthal anterior

teeth. However, when defect depth is scaled by perikymata depth to assess their severity, Neolithic humans have less severe defects, while Neanderthals and the other H. sapiens groups show evidence of more severe early life growth disruptions.

Item Type: Article
DOI/Identification number: 10.1038/s41598-020-80148-w
Uncontrolled keywords: enamel profilometry, Neanderthal, Homo sapiens, teeth
Subjects: G Geography. Anthropology. Recreation > GN Anthropology
Divisions: Divisions > Division of Human and Social Sciences > School of Anthropology and Conservation
Depositing User: Emmy Bocaege
Date Deposited: 08 Jan 2021 11:52 UTC
Last Modified: 16 Feb 2021 14:17 UTC
Resource URI: (The current URI for this page, for reference purposes)
McGrath, Kate:
Bocaege, Emmy:
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