Bone is capable of adapting during life in response to stress. Therefore, variation in locomotor and manipulative behaviours across extant hominoids may be reflected in differences in trabecular bone structure. The hand is a promising region for trabecular analysis, as it is the direct contact between the individual and the environment and joint positions at peak loading vary amongst extant hominoids. Building upon traditional volume of interest-based analyses, we apply a wholeepiphysis analytical approach using high-resolution microtomographic scans of the hominoid third metacarpal to investigate whether trabecular structure reflects differences in hand posture and loading in knuckle-walking (Gorilla, Pan), suspensory (Pongo, Hylobates and Symphalangus) and manipulative (Homo) taxa. Additionally, a comparative phylogenetic method was used to analyse rates of evolutionary changes in trabecular parameters. Results demonstrate that trabecular bone volume distribution and regions of greatest stiffness (i.e., Young’s modulus) correspond with predicted loading of the hand in each behavioural category. In suspensory and manipulative taxa, regions of high bone volume and greatest stiffness are concentrated on the palmar or distopalmar regions of the metacarpal head, whereas knuckle-walking taxa show greater bone volume and stiffness throughout the head, and particularly in the dorsal region; patterns that correspond with the highest predicted joint reaction forces. Trabecular structure in knuckle-walking taxa is characterised by high bone volume fraction and a high degree of anisotropy in contrast to the suspensory brachiators. Humans, in which the hand is used primarily for manipulation, have a low bone volume fraction and a variable degree of anisotropy. Finally, when trabecular parameters are mapped onto a molecular-based phylogeny, we show that the rates of change in trabecular structure vary across the hominoid clade. Our results support a link between inferred behaviour and trabecular structure in extant ...


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Trabecular Bone Structure Correlates with Hand Posture and Use in Hominoids


    Beteiligte:
    Skinner, M (Autor:in) / Tsegai, ZJ (Autor:in) / Kivell, TL (Autor:in) / Gross, T (Autor:in) / Nguyen, NH (Autor:in) / Pahr, DH (Autor:in) / Smaers, JB (Autor:in)

    Erscheinungsdatum :

    2013-11-14


    Anmerkungen:

    PLoS One , 8 (11) , Article e78781. (2013)


    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    DDC:    629



    Soft classification of trabeculae in trabecular bone

    Moreno, Rodrigo / Borga, Magnus / Smedby, Örjan | BASE | 2011

    Freier Zugriff

    Hand posture analyzer (HPA) - Portable instruments for upper limb posture analysis

    Baldacci, S. / Cotronei, V. / Zolesi, V. et al. | AIAA | 2001



    The effect of alendronate sodium on trabecular bone structure in an osteoporotic rat model

    Tokmak Özşahin, Esin / Dere, Fahri / Kürkçü, Mehmet et al. | BASE

    Freier Zugriff

    Prediction of trabecular bone qualitative properties using scanning quantitative ultrasound

    Qin, Yi-Xian / Lin, Wei / Mittra, Erik et al. | Elsevier | 2012