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Título: | Evolution of spinopelvic alignment in hominins |
Autor: | Been, Ella; Gómez-Olivencia, Asier; Shefi, Sara; Soudack, M.; Bastir, Markus CSIC ORCID ; Barash, A. | Fecha de publicación: | may-2017 | Editor: | John Wiley & Sons | Citación: | Anatomical Record 300: 900-911 (2017) | Resumen: | Spinopelvic alignment refers to the interaction between pelvic orientation, spinal curvatures, and the line of gravity. In a healthy modern human, this alignment is characterized by reciprocal curves/orientation of the sacrum, lumbar lordosis, thoracic kyphosis, and cervical lordosis. In an economic sagittal posture, these curvatures keep the line of gravity close to the center of the acetabulum. The purpose of this study is to explore the spinopelvic alignment in extinct hominins. We examined spinopelvic alignment of a single representative from each of the following hominin groups: Australopithecus, Homo erectus (H. erectus), H. neanderthalensis, and early H. sapiens. Pelvic incidence, lumbar lordosis, thoracic kyphosis, and cervical lordosis for each representative was estimated and compared with that of modern humans. Three basic spinopelvic alignments were found: (1) the sinusoidal alignment with moderate to high spinal curvatures and pelvic incidence found in H. erectus and H. sapiens; (2) the straight alignment with small spinal curvatures and small pelvic incidence found in Neandertal lineage hominins; (3) the compound alignment found in Australopithecus, with moderate pelvic incidence and lumbar lordosis, and nearly straight cervical spine. Our results indicate that balanced upright posture can be achieved in different alignments. Each hominin group solved the requirements of erect posture in a slightly different way. Moreover, we propose the term “cranio-spino-pelvic balance” to substitute “spino-pelvic balance.” From an evolutionary perspective, not only changes in the pelvis have conditioned the evolution of the spinal curvatures but also changes in the equilibrium of the head likely also affected this balance. Anat Rec, 300:900–911, 2017. © 2017 Wiley Periodicals, Inc. | URI: | http://hdl.handle.net/10261/158933 | DOI: | 10.1002/ar.23559 | Identificadores: | doi: 10.1002/ar.23559 issn: 1932-8494 |
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