Internal structural properties of the humeral diaphyses in an early modern human from Tianyuan Cave, China

Wei, Pianpian; Zhao, Yuhao; Walker, Christopher S.; He, Jin‐Sheng; Lu, Xiaoyu; Hui, Jiaming; Shui, Wuyang; Li, Jin; Liu, Wu

doi:10.1016/j.quaint.2021.04.012

Cited by 7 publications

(10 citation statements)

References 49 publications

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“…There are three sets of Late Pleistocene to Early Holocene humeri from East Asia with secure dates: Tianyuan 1, Zhaoguo M1, and Qihe M2 (Shang et al, 2007; Shang & Trinkaus, 2010; Wei et al, 2017, 2020). The left and right Tianyuan 1 humeri (42,000 to 39,000 cal BP) show marked bilateral asymmetry and are similar to those of early modern humans with very few archaic features such as narrow medial pillars (Shang & Trinkaus, 2010; Wei et al, 2021). The left and right Zhaoguo M1 humeri (10,663–11,068 cal BP) exhibit typical Late Upper Paleolithic (LUP) modern human humeral morphology with modest bilateral asymmetry (Wei et al, 2020).…”

Section: Introductionmentioning

confidence: 68%

“…The left and right Tianyuan 1 humeri (42,000 to 39,000 cal BP) show marked bilateral asymmetry and are similar to those of early modern humans with very few archaic features such as narrow medial pillars (Shang & Trinkaus, 2010;Wei et al, 2021). The left and right Zhaoguo M1 humeri (10,068 cal BP) exhibit typical Late Upper Paleolithic (LUP) modern human humeral morphology with modest bilateral asymmetry (Wei et al, 2020).…”

Section: Introductionmentioning

confidence: 85%

“…For the missing rectangular portion of the Tianyuan 1 right humerus PA1290 extracted for previous genetic analyses (Fu et al, 2013), we superimposed the relatively complete left humerus PA1289 to PA1290, and reconstructed the right humeral missing portions on all relevant CT slices with reference to that of the left one using VGStudio Max 2.2. We also made subtle adjustments according to the preserved portions of PA1290 around the missing region (Wei et al, 2021). The humeral regions of interests (ROIs) of all specimens were virtually extracted from the original grayscale images using the half‐maximum height method and the region of interest thresholding protocol (Fajardo et al, 2002; Spoor et al, 1993).…”

Section: Methodsmentioning

confidence: 99%

“…Thus, we partitioned the humeral diaphysis into different regions along the proximo-distal F I G U R E 6 2D colormap of standardized second moment of area of all specimens. L, left humerus; R, right humerus diaphysis: proximal (80%-65%), mid-proximal (~65%-50%), midshaft region (~50%), mid-distal (~50%-35%), and distal diaphysis (~35%-20%) (Wei et al, 2021).…”

Section: D Color Map Visualization Of Humeral Diaphysismentioning

confidence: 99%

“…While these observations of CBT and CSG properties at specific cross sections of humeral diaphysis are frequently measured in hominins as mentioned above, external and internal structural comparisons such as CBT, SMA, ER, and J measured continuously over the entire humeral shaft are relatively less documented (Cazenave et al, 2017; Wei et al, 2021; Zhao et al, 2021). These types of measurements have the potential to provide more useful and comprehensive information for studies of hominin diaphyseal robusticity and help clarify the adaptive behavior of ancient hominins.…”

Section: Introductionmentioning

confidence: 99%

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Structural properties of humeral diaphyses of East Asian modern humans from the Late Pleistocene to Early Holocene

Zhao

Wei

Zhang

et al. 2022

American Journal of Biological Anthropology

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Objectives: This study aims to explore the structural properties along entire humeral diaphyses of Late Pleistocene and Early Holocene East Asian modern humans relative to the contemporaneous Neandertal specimen Regourdou 1 to provide insight into adaptive behaviors within temporal and regional hominin contexts. Materials and methods:The humeri of three individuals from East Asia securely dated from the Late Pleistocene to Early Holocene were selected: Tianyuan 1, Zhaoguo M1, and Qihe M2. These specimens were scanned using microcomputed tomography to evaluate structural properties: cortical bone thickness (CBT), second moment of area (SMA), external radius (ER), and polar moment of area (J). Results:The distribution patterns of CBT, ER, and J were similar across all specimens.However, the magnitude of these variables was notably large in Regourdou 1 right humerus. The SMA, ER, and J of left humerus of Tianyuan 1 were less than that of other East Asian specimens, whereas those from the right humerus of the Qihe M2 individual were slightly larger than two other East Asian individuals. Additionally, the humeral asymmetry of Tianyuan 1 was greater than that of Zhaoguo M1 and Qihe M2.Discussion: Compared to Regourdou 1, East Asian specimens had reduced humeral robusticity. Within East Asia, the Late Pleistocene modern humans exhibit greater humeral asymmetry than the Early Holocene humans, indicating a universal reduction of humeral asymmetry related to technological changes across Eurasia during this time. The current study contributes to developing a more thorough understanding of

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Section: Introductionmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 85%

Section: Methodsmentioning

confidence: 99%

Section: D Color Map Visualization Of Humeral Diaphysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Structural properties of humeral diaphyses of East Asian modern humans from the Late Pleistocene to Early Holocene

Zhao

Wei

Zhang

et al. 2022

American Journal of Biological Anthropology

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A structural reassessment of the Late Pleistocene femur from Maludong, southwestern China

Wei

Ma²,

Carlson

et al. 2022

American Journal of Biological Anthropology

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Objective: The Late Pleistocene partial right femur from Maludong in southwestern China has been attributed characteristics of early Homo, especially from the Early Pleistocene, putatively representing a late surviving archaic population in the region.Assessment of additional traits is warranted given newly described postcrania from the Late Pleistocene of southwestern China and characterized by relatively modern features. Materials and methods:We used micro computed tomography (μCT) to extract and evaluate cross-sectional diaphyseal structure. New predictions of Maludong femoral length were generated from a regression analysis of Holocene modern humans.Robusticity and shape at multiple, standard diaphyseal regions of interest (ROI) were compared to those of Pleistocene and Holocene humans from East Asia and beyond. Results: Standardized torsional rigidities at mid-proximal and subtrochantericMaludong ROIs fell within ranges of variation exhibited by multiple comparative groups, and closest to medians of Early and Middle Upper Paleolithic modern humans (E/MUP). For I x /I y diaphyseal ratios, Maludong was higher than comparative groups at both ROIs, falling closest to the upper end of the E/MUP range. For I max /I min shape ratios, Maludong fell well above group medians at the mid-proximal ROI and nearest E/MUP and Middle Pleistocene group medians at the subtrochanteric ROI.

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Impact of subsistence patterns on the overall configuration of bending rigidity along humeral diaphyses in modern humans

Zhou²,

Zhao

et al. 2022

Archaeol Anthropol Sci

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Internal structural properties of the humeral diaphyses in an early modern human from Tianyuan Cave, China

Cited by 7 publications

References 49 publications

Structural properties of humeral diaphyses of East Asian modern humans from the Late Pleistocene to Early Holocene

Structural properties of humeral diaphyses of East Asian modern humans from the Late Pleistocene to Early Holocene

A structural reassessment of the Late Pleistocene femur from Maludong, southwestern China

Impact of subsistence patterns on the overall configuration of bending rigidity along humeral diaphyses in modern humans

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