The lumbar facet joint (FJ) is a unique structure located on the posterior spine. The joint is composed of two articular facets from adjacent vertebrae, which are connected by a flexible and strong facet capsular ligament (FCL) (Figure 1). Two FJs (one on each side of the spinous process) are located at every spine level and along with the IVD, create a motion segment. During spinal flexion and extension, the FCL undergoes a complex motion, with extension and shear dominating the deformation (Figure 2). The collagenous FCL guides and restricts the relative motion of adjacent vertebra in flexion.
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In Vivo Lumbar Range of Motion During Flexion in Healthy Subjects
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Claeson, AA, Nuckley, DJ, & Barocas, VH. "Characterization of In Vivo Lumbar Range of Motion During Flexion in Healthy Subjects." Proceedings of the ASME 2013 Summer Bioengineering Conference. Volume 1A: Abdominal Aortic Aneurysms; Active and Reactive Soft Matter; Atherosclerosis; BioFluid Mechanics; Education; Biotransport Phenomena; Bone, Joint and Spine Mechanics; Brain Injury; Cardiac Mechanics; Cardiovascular Devices, Fluids and Imaging; Cartilage and Disc Mechanics; Cell and Tissue Engineering; Cerebral Aneurysms; Computational Biofluid Dynamics; Device Design, Human Dynamics, and Rehabilitation; Drug Delivery and Disease Treatment; Engineered Cellular Environments. Sunriver, Oregon, USA. June 26–29, 2013. V01AT09A013. ASME. https://doi.org/10.1115/SBC2013-14263
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