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European Spine Journal

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01-11-2016 | Original Article

A new quasi-invariant parameter characterizing the postural alignment of young asymptomatic adults

Authors: Celia Amabile, Hélène Pillet, Virginie Lafage, Cédric Barrey, Jean-Marc Vital, Wafa Skalli

Published in: European Spine Journal | Issue 11/2016

Abstract

Purpose

Our study aims to describe the postural alignment of young asymptomatic subjects from head to feet from bi-planar standing full-body X-rays, providing database to compare to aging adults. Novelty resides in the inclusion of the head and lower limbs in the erected posture’s analysis.

Methods

For 69 young asymptomatic subjects (18–40 years old) 3D reconstructions of the head, spine, pelvis and lower limbs segments were performed from bi-planar full-body X-rays. Usual studied spinal, pelvic and lower limbs’ parameters were computed in 3D, sagittal and frontal planes of the patient. Relationships between these parameters were investigated. Inclinations of different lines were studied to characterize the erected posture.

Results

Values found for spinal curvatures, pelvic parameters and lower limbs geometrical parameters agreed with the literature: thoracic kyphosis, lumbar lordosis, pelvic incidence, pelvic tilt and sagittal vertical axis were respectively in average of 26.9° (SD 7.2°), 30.5° (SD 7.5°), 51.0° (SD 9.4°), 11.1° (SD 5.6°) and −8.9 mm (SD 21.6 mm). The angle between the vertical and the line joining the most superior point of dentiform apophyse of C2 (OD) and the center of the bi-coxofemoral axis (HA) was the less variable one (SD 1.6°).

Conclusions

This study on 3D postural alignment reports the geometry of the spine, pelvis and lower limbs, of the young asymptomatic adult. The less variable angle is the one of the line OD–HA with the vertical, highlighting the vertical alignment of the head above the pelvis. This study provides a basis for future comparisons when investigating aging populations.

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Title: A new quasi-invariant parameter characterizing the postural alignment of young asymptomatic adults
Authors: Celia Amabile
Hélène Pillet
Virginie Lafage
Cédric Barrey
Jean-Marc Vital
Wafa Skalli
Publication date: 01-11-2016
Publisher: Springer Berlin Heidelberg
Published in: European Spine Journal / Issue 11/2016
Print ISSN: 0940-6719
Electronic ISSN: 1432-0932
DOI: https://doi.org/10.1007/s00586-016-4552-y

Keynote webinar | Spotlight on sleep in brain health

Springer Medicine

A new quasi-invariant parameter characterizing the postural alignment of young asymptomatic adults

Abstract

Purpose

Methods

Results

Conclusions

Keynote webinar | Spotlight on sleep in brain health

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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