In vivo dynamic changes of dimensions in the lumbar intervertebral foramen

Abstract Background context Previous studies have reported position-dependent changes of the lumbar intervertebral foramen (LIVF) dimensions at different static flexion-extension postures. However, the changes of the LIVF dimensions during dynamic body motion have not been reported. Purpose The obje...

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Bibliographic Details
Published in:The spine journal 2015-07, Vol.15 (7), p.1653-1659
Main Authors: Zhong, Weiye, MD, Driscoll, Sean J., MEng, Tsai, Tsung-Yuan, PhD, Wang, Shaobai, PhD, Mao, Haiqing, MD, Cha, Thomas D., MD, Wood, Kirkham B., MD, Li, Guoan, PhD
Format: Article
Language:English
Subjects:
Adult
Biomechanical Phenomena
Dual-fluoroscopy
Female
Foramen area
Humans
In-vivo
Lumbar intervertebral foramen
Lumbar kinematics
Lumbar stenosis
Lumbar Vertebrae - physiology
Lumbosacral Region - diagnostic imaging
Magnetic Resonance Imaging - methods
Male
Middle Aged
Orthopedics
Posture
Radiography
Range of Motion, Articular
Retrospective Studies
Rotation
Stress, Mechanical
Weight Lifting - physiology
Weight-lifting activity
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Summary:Abstract Background context Previous studies have reported position-dependent changes of the lumbar intervertebral foramen (LIVF) dimensions at different static flexion-extension postures. However, the changes of the LIVF dimensions during dynamic body motion have not been reported. Purpose The objective of this study was to investigate the in vivo dimensions of the LIVF during a dynamic weight-lifting activity. Study design/Setting This was a retrospective study. Methods Ten asymptomatic subjects were recruited for this study. Three-dimensional (3D) vertebral models of the lumbar segments from L2 to S1 were constructed for each subject using magnetic resonance images. The lumbar spine was then imaged using a dual fluoroscopic imaging system as the subject performed a dynamic weight-lifting activity from an upper body position of 45° to a maximal extension position. The in vivo positions of the vertebrae along the motion path were reproduced using the 3D vertebral models and the fluoroscopic images. The minimal area, height, and width of each LIVF during the dynamic body motion were analyzed. Results The LIVF area and width monotonically decreased with lumbar extension at all levels except L5–S1 (p
ISSN:1529-9430
1878-1632
DOI:10.1016/j.spinee.2015.03.015