| In-vivo motion characteristics of lumbar vertebrae in sagittal and transverse planes. | |
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MedLine Citation:
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PMID: 20381051 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Lumbar vertebrae are complicated in structure and function. The purpose of this study was to investigate the in-vivo motion characteristics of different portions of the lumbar vertebrae during functional activities. Motion of L2, L3 and L4 was reproduced using a combined dual fluoroscopic and MR imaging technique during flexion-extension and left-right twisting of the trunk. The ranges of motion (ROM) of the proximal vertebra with respect to the distal one at 3 representative locations: the center of the vertebral body, the center of the spinal canal and the tip of the spinous process were measured. Centers of rotation (COR) of the vertebrae were then determined by calculation of the points of zero motion in 2D sagittal and transverse planes. During flexion-extension, the center of the vertebral body moved less than 0.6mm, while the tip of the spinous process moved less than 7.5mm in the sagittal plane. The CORs of both L23 (L2 with respect to L3) and L34 were located inside the vertebral body, at a distance about one-third the length of the vertebral body from the posterior edge. During left-right twisting, the center of the vertebral body moved less than 1.0mm, while the tip of the spinous process moved less than 1.6mm in the transverse plane. The CORs of both L23 and L34 were located approximately 30mm anterior to the front edge of the vertebral body. The results of this study may be used to define the ideal locations for surgical placement of the disc prosthesis, thus help improve the prosthesis design and surgical treatment of various pathological conditions. |
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Authors:
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Qun Xia; Shaobai Wang; Michal Kozanek; Peter Passias; Kirkham Wood; Guoan Li |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-04-09 |
Journal Detail:
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Title: Journal of biomechanics Volume: 43 ISSN: 1873-2380 ISO Abbreviation: J Biomech Publication Date: 2010 Jul |
Date Detail:
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Created Date: 2010-07-08 Completed Date: 2010-10-29 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0157375 Medline TA: J Biomech Country: United States |
Other Details:
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Languages: eng Pagination: 1905-9 Citation Subset: IM |
Copyright Information:
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2010 Elsevier Ltd. All rights reserved. |
Affiliation:
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Bioengineering Lab, Department of Orthopaedic Surgery, Massachusetts General Hospital/Harvard Medical School, 55 Fruit St., GRJ 1215, Boston, MA 02114, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Aged Biomechanics Female Humans Intervertebral Disk / physiology, radiography Lumbar Vertebrae / physiology*, radiography Male Middle Aged Range of Motion, Articular / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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