Digitization of the <scp>Nissen–Riesen</scp> chimpanzee radiological growth series

Thompson, Nathan E.; Ahmed, Lameesah; Celebi, Taner B; Coopee, Zachary; Koll, Nikki; Rubinstein, Danielle; Saunders, Megan; Anemone, Robert L.

doi:10.1002/evan.21836

Cited by 3 publications

(2 citation statements)

References 35 publications

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“…Chimpanzee model wrist, elbow, and glenohumeral joint centers were iteratively translated to represent appropriate segment lengths of the forearm and arm, using previously reported segment lengths (Schoonaert et al, 2007 ). Glenohumeral joint position was also translated by shifting the acromion marker to adjust the scapular position to reflect that observed in X‐rays of chimpanzees (Thompson et al, 2020 ). This process did not alter joint orientation.…”

Section: Methodsmentioning

confidence: 99%

A comparative probabilistic analysis of human and chimpanzee rotator cuff functional capacity

2023

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Computational musculoskeletal modeling represents a valuable approach to examining biological systems in physical anthropology. Probabilistic modeling builds on computational musculoskeletal models by associating mathematical distributions of specific musculoskeletal features within known ranges of biological variability with functional outcomes. The purpose of this study was to determine if overlap in rotator cuff muscle force predictions would occur between species during the performance of an evolutionarily relevant horizontal bimanual arm suspension task. This necessitated creating novel probabilistic models of the human and chimpanzee glenohumeral joint through augmentation of previously published deterministic models. Glenohumeral musculoskeletal features of anthropological interest were probabilistically modeled to produce distributions of predicted human and chimpanzee rotator cuff muscle force that were representative of the specific anatomical manipulations. Musculoskeletal features modeled probabilistically included rotator cuff origins and deltoid insertion, glenoid inclination, and joint stability. Predicted human rotator cuff muscle force distributions were mostly limited to alternating between infraspinatus and teres minor, with both 100% and 0% muscle force predicted for both muscles. The chimpanzee model predicted low‐to‐moderate muscle force across all rotator cuff muscles. Rotator cuff muscle force predictions were most sensitive to changes of muscle origins and insertions. Results indicate that functional rotator cuff overlap is unlikely between chimpanzees and humans without greater modifications of the glenohumeral musculoskeletal phenotypes. The results also highlight the low efficacy of the human upper extremity in overhead, weight‐bearing tasks, and propensity for rotator cuff injury.

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Section: Methodsmentioning

confidence: 99%

A comparative probabilistic analysis of human and chimpanzee rotator cuff functional capacity

2023

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“…These measurements were increased by an additional amount (1.1-3.2%) to account for additional growth between the X-ray date and experimental date. This amount was determined based on growth rates derived from a large chimpanzee radiological dataset (Thompson et al, 2020; see Tables S1 and S2, and Fig. S1 for details).…”

Section: Data Collection and Analysismentioning

confidence: 99%

The loss of the ‘pelvic step’ in human evolution

Thompson

Rubinstein

Parrella-O'Donnell

et al. 2021

Journal of Experimental Biology

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Human bipedalism entails relatively short strides compared with facultatively bipedal primates. Unique non-sagittal-plane motions associated with bipedalism may account for part of this discrepancy. Pelvic rotation anteriorly translates the hip, contributing to bipedal stride length (i.e. the ‘pelvic step’). Facultative bipedalism in non-human primates entails much larger pelvic rotation than in humans, suggesting that a larger pelvic step may contribute to their relatively longer strides. We collected data on the pelvic step in bipedal chimpanzees and over a wide speed range of human walking. At matched dimensionless speeds, humans have 26.7% shorter dimensionless strides, and a pelvic step 5.4 times smaller than bipedal chimpanzees. Differences in pelvic rotation explain 31.8% of the difference in dimensionless stride length between the two species. We suggest that relative stride lengths and the pelvic step have been significantly reduced throughout the course of hominin evolution.

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Development of a comparative chimpanzee musculoskeletal glenohumeral model: implications for human function

MacLean

Dickerson

2020

Journal of Experimental Biology

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Modern human shoulder function is affected by the evolutionary adaptations that have occurred to ensure survival and prosperity of the species. Robust examination of behavioral shoulder performance and injury risk can be holistically improved through an interdisciplinary approach that integrates anthropology and biomechanics. Coordination of these fields can allow different perspectives to contribute to a more complete interpretation of biomechanics of the modern human shoulder. The purpose of this study was to develop a novel biomechanical and comparative chimpanzee glenohumeral model, designed to parallel an existing human glenohumeral model, and compare predicted musculoskeletal outputs between the two models. The chimpanzee glenohumeral model consists of three modules – an external torque module, musculoskeletal geometric module, and an internal muscle force prediction module. Together, these modules use postural kinematics, subject specific anthropometrics, a novel shoulder rhythm, glenohumeral stability ratios, hand forces, musculoskeletal geometry, and an optimization routine to estimate joint reaction forces and moments, subacromial space dimensions, and muscle and tissue forces. Using static postural data of horizontal bimanual suspension task, predicted muscle forces and subacromial space were compared between chimpanzees and humans. Compared to chimpanzees, the human model predicted a 2mm narrower subacromial space, deltoid muscle forces that were often double those of chimpanzees and a strong reliance on infraspinatus and teres minor (60-100% maximal force) over other rotator cuff muscles. These results agree with previous work on inter-species differences that inform basic human rotator cuff function and pathology.

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Digitization of the Nissen–Riesen chimpanzee radiological growth series

Cited by 3 publications

References 35 publications

A comparative probabilistic analysis of human and chimpanzee rotator cuff functional capacity

A comparative probabilistic analysis of human and chimpanzee rotator cuff functional capacity

The loss of the ‘pelvic step’ in human evolution

Development of a comparative chimpanzee musculoskeletal glenohumeral model: implications for human function

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