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J Biomech Eng. 2019 Oct 1. doi: 10.1115/1.4045111. [Epub ahead of print]

Relationship Between Cervical, Thoracic and Lumbar Spinal Alignments in Automotive Seated Posture.

Author information

1
Safety Research Division, Japan Automobile Research Institute, Karima 2530, Tsukuba, Ibaraki, 305-0822, Japan; Department of Mechanics and Maritime Sciences, Chalmers University of Technology, SE - 412 96, Gothenburg, Sweden.
2
Department of Systems and Control Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan.
3
Shiga University of Medical Science, Seta Tsukinowa-cho, Otsu, Shiga, 530-2192, Japan.
4
Fundación de Investigación HM Hospitales, Avenida de Montepríncipe nº 25, 28660 Boadilla del Monte, Madrid, Spain.
5
Department of Forensic Epidemiology, Institute of Legal Medicine, Ludwig-Maximilians-University of Munich, Postfach 151023, D-80046 München, Germany.
6
Safety Research Division, Japan Automobile Research Institute, Karima 2530, Tsukuba, Ibaraki, 305-0822, Japan.
7
Department of Mechanics and Maritime Sciences, Chalmers University of Technology, SE - 412 96, Gothenburg, Sweden.

Abstract

The purpose of this study was to investigate the relationship between cervical, thoracic and lumbar spinal alignments in one automotive occupant seated posture. An image data set of the spinal column in the automotive seated posture, previously acquired by an upright open Magnetic Resonance Imaging system, were reanalysed in this study. Spinal alignments were presented by the geometrical centres of the vertebral bodies extracted from the image data. Cervical, thoracic and lumbar spinal alignments were analysed separately with Multi-Dimensional Scaling (MDS). Based on distribution maps of cervical, thoracic and lumbar spinal alignments created by MDS, representative spinal alignment patterns of the cervical, thoracic and lumbar spines and the relationship between cervical, thoracic and lumbar spinal alignments were investigated. As a result, this study found a correlation between cervical and thoracic spinal alignments in an automotive occupant seated posture. According to representative spinal alignment patterns illustrated by the distribution map of spinal alignments, subjects who had kyphotic cervical spinal alignment tended to have less kyphotic thoracic spinal alignment, while subjects who had lordotic cervical spinal alignment tended to have more kyphotic thoracic spinal alignment. For lumbar spinal alignments, no prominent relationship was found between cervical or thoracic spinal alignment in the seated condition of this study.

PMID:
31596923
DOI:
10.1115/1.4045111

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