| Autor: |
Eric R, Castillo, Connie, Hsu, Ross W, Mair, Daniel E, Lieberman |
| Rok vydání: |
2016 |
| Předmět: |
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| Zdroj: |
American journal of physical anthropology. 163(1) |
| ISSN: |
1096-8644 |
| Popis: |
Lumbar lordosis (LL) is a key adaptation for bipedalism, but factors underlying curvature variations remain unclear. This study tests three biomechanical models to explain LL variability.Thirty adults (15 male, 15 female) were scanned using magnetic resonance imaging (MRI), a standing posture analysis was conducted, and lumbar range of motion (ROM) was assessed. Three measures of LL were compared. The trunk's center of mass was estimated from external markers to calculate hip moments (MHip moments were not associated with LL. Beam bending was moderately predictive of standing but not supine LL (RHip moments appear constrained suggesting the possibility of selection, and the beam model explains some LL variability due to variations in trunk geometry. The strength-flexibility interaction best predicted LL, suggesting a tradeoff in which ROM limits the effects of back strength on LL. The strength-flexibility model may have clinical relevance for spinal alignment and pathology. This model may also suggest that straight-backed Neanderthals had reduced lumbar mobility. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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