A dynamic approach to spinal instability. Part I: Sensitization of intersegmental motion profiles to motion direction and load condition by instability

Spine
M OgonM H Pope

Abstract

Human lumbar functional spinal units (FSUs) were moved throughout their range of motion in sagittal and lateral bending while the dynamics of this movement were computed in vitro. Functional spinal units were tested intact and after subsequent discectomy and unilateral facetectomy. To establish "normal" velocity and acceleration curves during lumbar intersegmental bending in the intact FSU and then evaluate the changes of this dynamic behavior due to surgically induced component instability. In preliminary clinical studies, researchers have provided evidence that dynamic motion measurements may be useful in the assessment of spinal impairment. Human lumbar FSUs moved from extension to flexion, flexion to extension, left to right, and right to left a pure moment. Range of motion, as well as velocity and acceleration patterns of the main and coupled motions, were evaluated in six degrees of freedom by position changes of attached infrared light-emitting diodes recorded by cameras. Functional spinal units were tested in three surgical conditions (intact, discectomy, and unilateral facetectomy) under two preload conditions (no preload and 400 N preload). Motion of intact FSUs progressed with velocity and acceleration patterns that ...Continue Reading

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Citations

Jul 28, 2005·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·Julie M FritzJohn D Childs
Dec 11, 2008·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·Kazuhiro HasegewaHaruka Shimoda
Jan 16, 2014·HSS Journal : the Musculoskeletal Journal of Hospital for Special Surgery·Anna Ribaudo
Apr 24, 2004·Spine·Wafa TawackoliMichael A K Liebschner
Apr 1, 2006·Journal of Neurosurgery. Spine·Ung-Kyu ChangDaniel H Kim
Apr 28, 2001·The Journal of Orthopaedic and Sports Physical Therapy·K A Olson, D Joder
Feb 4, 2011·The Journal of Orthopaedic and Sports Physical Therapy·Abdullah M AlqarniPaul A Hendrick
Mar 10, 2009·Journal of Biomechanics·A RohlmannG Bergmann
Sep 25, 1999·IEEE Transactions on Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·K A KhalafK Barin
Sep 9, 2005·Physiotherapy Research International : the Journal for Researchers and Clinicians in Physical Therapy·Chad CookPhilip S Sizer
Sep 12, 2001·Clinical Orthopaedics and Related Research·M OgonC Wimmer

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