Articlegreen2011

Ontogenetic changes in the internal and external morphology of the ilium in modern humans

52 citations0/0 files storedJournal of Anatomy

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Forensic Anthropology and Bioarchaeology Studies Bone health and osteoporosis research Morphological variations and asymmetry

Abstract

Trabecular architecture forms an important structural component of bone and, depending on the loading conditions encountered during life, is organised in a systematic, bone- and species-specific manner. However, recent studies suggested that gross trabecular arrangement (e.g. density distribution), like overall bone shape, is predetermined and/or affected by factors other than loading and perhaps less plastic than commonly assumed. To explore this issue further, the present cross-sectional ontogenetic study investigated morphological changes in external bone shape in relation to changes in trabecular bundle orientation and anisotropy. Radiographs of 73 modern human ilia were assessed using radiographic and Geometric Morphometric techniques. The study confirmed the apparently strong predetermination of trabecular bundle development, i.e. prior to external loading, although loading clearly also had an effect on overall morphology. For example, the sacro-pubic bundle, which follows the path of load transmission from the auricular surface to the acetabulum, is well defined and shows relatively high levels of anisotropy from early stages of development; the situation for the ischio-iliac strut is similar. However, while the sacro-pubic strut retains a constant relationship with the external landmarks defining the joint surfaces, the ischio-iliac bundle changes its relationship with the external landmarks and becomes aligned with the iliac tubercle only during late adolescence/early adulthood. It is tentatively proposed that the rearrangement of the ischio-iliac strut may reflect a change in locomotor pattern and/or a shift in positional behavior with increasing mass after growth of external bone dimensions has slowed/ceased.

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2013Trabecular bone anisotropy and orientation in an Early Pleistocene hominin talus from East Turkana, Kenya 2015An ontogenetic framework linking locomotion and trabecular bone architecture with applications for reconstructing hominin life history 2017Trabecular and cortical bone structure of the talus and distal tibia in Pan and Homo 2015The Pelvic Girdle and Limb Bones of KSD-VP-1/1 2018Ontogeny and variability of trabecular bone in the chimpanzee humerus, femur and tibia

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