The morphofunctional implications of the glenoid labrum of the glenohumeral joint in hominoids
Raventos-Izard, Georgina (Institut Català de Paleontologia Miquel Crusafont)
Potau, Josep Maria (Universitat de Barcelona. Unitat d'Anatomia i Embriologia)
Casado, Aroa (Universitat de Barcelona. Unitat d'Anatomia i Embriologia)
Pastor, Juan Francisco (Universidad de Valladolid. Departamento de Anatomía y Radiología)
Arias-Martorell, Julia (Institut Català de Paleontologia Miquel Crusafont)

Data:	2023
Resum:	Objectives: a morphocline of the glenoid cavity has been used to infer differences in locomotor behaviors; however, the glenoid cavity is surrounded by the glenoid labrum, a fibrocartilaginous structure that could influence the functionality of the glenoid. The objectives of this study are to explore the effects of the glenoid labrum on the area, depth, and morphology of the glenoid cavity in primates. - Materials and Methods : photogrammetry was used to build 3D models of the glenoid, with and without the labrum, and three- (3D) and two-dimensional (2D) geometric morphometrics (GM) was applied. 2D areas were collected from zenithal images for glenoids with and without labrum to evaluate the availability of articular surface area. - Results: in the 2D GM the morphocline is present in the dry-bone sample but not with the presence of the glenoid labrum. In the 3D GM there are differences between species mainly concerning the depth of the glenoid cavity. 2D areas reveal that the amount of articular area of the glenoid cavity increases with the presence of the labrum, particularly in humans. - Discussion: the glenoid labrum changes the shape, increases the depth and the surface area of the glenoid cavity, particularly in humans. Therefore, the glenoid labrum might hold a functional role, increasing the stability of the glenohumeral joint of primates in general, and especially in humans.
Ajuts:	European Commission 801370 Agencia Estatal de Investigación PID2020-116908GB-I00 Ministerio de Economía y Competitividad CGL2014-52611-C2-2-P Agència de Gestió d'Ajuts Universitaris i de Recerca 2018/BP-00058
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Geometric morphometrics ; Photogrammetry ; Shoulder joint ; Glenoid cavity ; Apes
Publicat a:	American Journal of Biological Anthropology, Vol. 181, issue 2 (June 2023) , p. 195-205, ISSN 2692-7691

DOI: 10.1002/ajpa.24729

Disponible a partir de: 2024-06-30 Postprint

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