scholarly journals Corrigendum: Musculoskeletal Modeling of the Lumbar Spine to Explore Functional Interactions between Back Muscle Loads and Intervertebral Disk Multiphysics

2015 ◽  
Vol 3 ◽  
Author(s):  
Themis Toumanidou ◽  
Jérôme Noailly
Keyword(s):  
Lumbar Spine ◽  
Intervertebral Disk ◽  
Musculoskeletal Modeling ◽  
Back Muscle ◽  
Functional Interactions

LBNP treadmill exercise maintains spine function and muscle strength in identical twins during 28-day simulated microgravity

2007 ◽  
Vol 102 (6) ◽  
pp. 2274-2278 ◽  
Author(s):  
Brandon R. Macias ◽  
Peihong Cao ◽  
Donald E. Watenpaugh ◽  
Alan R. Hargens
Keyword(s):  
Lumbar Spine ◽  
Muscle Strength ◽  
Lumbar Lordosis ◽  
Treadmill Exercise ◽  
Lower Body Negative Pressure ◽  
Bed Rest ◽  
Intervertebral Disk ◽  
Identical Twin ◽  
Back Muscle ◽  
Back Muscle Strength

The purpose of this study was to determine whether lower body negative pressure (LBNP) treadmill exercise maintains lumbar spinal compressive properties, curvature, and back muscle strength after 28 days of 6° head-down tilt (HDT) bed rest (BR). We hypothesize that LBNP treadmill exercise will maintain lumbar spine compressibility, lumbar lordosis and back muscle strength after 28 days of 6° HDT bed rest. Fifteen healthy identical twin pairs (14 women and 16 men) participated in this study. One identical twin was randomly assigned to the nonexercise control (Con) group, and their sibling was assigned to the exercise (Ex) group. The lumbar spine was significantly more compressible Post-BR compared with Pre-BR in the Con ( P = 0.01). Lumbar spine compressibility Post-BR was not significantly different compared with Pre-BR in the Ex group ( P = 0.89). In both the Con and Ex groups, there were no significant changes Post-BR in lumbar lordosis compared with Pre-BR. Back muscle strength significantly decreased in the Con group Post-BR ( P = 0.002), whereas in the Ex group back muscle strength was not significantly different from Pre-BR values. A significant increase in lumbar spine compressibility in the Con group suggests that spinal deconditioning to gravity occurs during 28-day bed rest. Changes in the mechanical properties of the lumbar spine may be an early indicator of lumbar intervertebral disk degeneration. Supine LBNP treadmill exercise provides axial loads to the lumbar spine and may prevent lumbar spine deconditioning associated with HDT bed rest.

Hybrid Rigid-Deformable Model for Prediction of Neighboring Intervertebral Disk Loads During Flexion Movement After Lumbar Interbody Fusion at L3–4 Level

2017 ◽  
Vol 139 (3) ◽  
Author(s):  
Tien Tuan Dao
Keyword(s):  
Lumbar Spine ◽  
Computational Models ◽  
Interbody Fusion ◽  
Clinical Decision ◽  
Intervertebral Disk ◽  
Design Guideline ◽  
Spinal Loads ◽  
Stress Changes ◽  
Stress Behaviors

Knowledge of spinal loads in neighboring disks after interbody fusion plays an important role in the clinical decision of this treatment as well as in the elucidation of its effect. However, controversial findings are still noted in the literature. Moreover, there are no existing models for efficient prediction of intervertebral disk stresses within annulus fibrosus (AF) and nucleus pulposus (NP) regions. In this present study, a new hybrid rigid-deformable modeling workflow was established to quantify the mechanical stress behaviors within AF and NP regions of the L1–2, L2–3, and L4–5 disks after interbody fusion at L3–4 level. The changes in spinal loads were compared with results of the intact model without interbody fusion. The fusion outcomes revealed maximal stress changes (10%) in AF region of L1–2 disk and in NP region of L2–3 disk. The minimal stress change (1%) is noted at the NP region of the L1–2 disk. The validation of simulation outcomes of fused and intact lumbar spine models against those of other computational models and in vivo measurements showed good agreements. Thus, this present study may be used as a novel design guideline for a specific implant and surgical scenario of the lumbar spine disorders.

Back Muscle Injury After Posterior Lumbar Spine Surgery

Spine ◽  
1994 ◽  
Vol 19 (Supplement) ◽  
pp. 2590-2597 ◽  
Author(s):  
Yoshiharu Kawaguchi ◽  
Hisao Matsui ◽  
Haruo Tsuji
Keyword(s):  
Lumbar Spine ◽  
Spine Surgery ◽  
Muscle Injury ◽  
Lumbar Spine Surgery ◽  
Back Muscle

Spinal Gas Collection Demonstrated at CT

1992 ◽  
Vol 33 (2) ◽  
pp. 93-96 ◽  
Author(s):  
J. Hjarbæk ◽  
P. W. Kristensen ◽  
P. Hauge
Keyword(s):  
Lumbar Spine ◽  
Epidural Space ◽  
Clinical Symptoms ◽  
Intervertebral Disk ◽  
Surgical Results ◽  
Facet Joints ◽  
Disk Herniation ◽  
Free Gas ◽  
Ct Findings

In 234 consecutive CT examinations of the lumbar spine, gas collection was observed in 4 cases with disk herniation, and in 6 cases of disk protrusion. In 3 cases free gas was found in the epidural space, and one patient presented an intraspinal gas-filled “bleb”. Gas collection in intervertebral disk spaces and facet joints was found in a total of 60 patients. The CT findings and surgical results were compared to determine whether gas collection contributes to clinical symptoms. In most cases the presence of gas was not clinically important, but in one patient it presented as a spinal mass, causing pain and radiculopathy.

Back Muscle Injury After Posterior Lumbar Spine Surgery

Spine ◽  
1994 ◽  
Vol 19 (Supplement) ◽  
pp. 2598-2602 ◽  
Author(s):  
Yoshiharu Kawaguchi ◽  
Hisao Matsui ◽  
Haruo Tsuji
Keyword(s):  
Lumbar Spine ◽  
Spine Surgery ◽  
Muscle Injury ◽  
Lumbar Spine Surgery ◽  
Back Muscle
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