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Ultrasound Evaluation of the Combined Effects of Thoracolumbar Fascia Injury and Movement Restriction in a Porcine Model

The persistence of back pain following acute back “sprains” is a serious public health problem with poorly understood pathophysiology. The recent finding that human subjects with chronic low back pain (LBP) have increased thickness and decreased mobility of the thoracolumbar fascia measured with ult...

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Autores principales: Bishop, James H., Fox, James R., Maple, Rhonda, Loretan, Caitlin, Badger, Gary J., Henry, Sharon M., Vizzard, Margaret A., Langevin, Helene M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4731465/
https://www.ncbi.nlm.nih.gov/pubmed/26820883
http://dx.doi.org/10.1371/journal.pone.0147393
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author Bishop, James H.
Fox, James R.
Maple, Rhonda
Loretan, Caitlin
Badger, Gary J.
Henry, Sharon M.
Vizzard, Margaret A.
Langevin, Helene M.
author_facet Bishop, James H.
Fox, James R.
Maple, Rhonda
Loretan, Caitlin
Badger, Gary J.
Henry, Sharon M.
Vizzard, Margaret A.
Langevin, Helene M.
author_sort Bishop, James H.
collection PubMed
description The persistence of back pain following acute back “sprains” is a serious public health problem with poorly understood pathophysiology. The recent finding that human subjects with chronic low back pain (LBP) have increased thickness and decreased mobility of the thoracolumbar fascia measured with ultrasound suggest that the fasciae of the back may be involved in LBP pathophysiology. This study used a porcine model to test the hypothesis that similar ultrasound findings can be produced experimentally in a porcine model by combining a local injury of fascia with movement restriction using a “hobble” device linking one foot to a chest harness for 8 weeks. Ultrasound measurements of thoracolumbar fascia thickness and shear plane mobility (shear strain) during passive hip flexion were made at the 8 week time point on the non-intervention side (injury and/or hobble). Injury alone caused both an increase in fascia thickness (p = .007) and a decrease in fascia shear strain on the non-injured side (p = .027). Movement restriction alone did not change fascia thickness but did decrease shear strain on the non-hobble side (p = .024). The combination of injury plus movement restriction had additive effects on reducing fascia mobility with a 52% reduction in shear strain compared with controls and a 28% reduction compared to movement restriction alone. These results suggest that a back injury involving fascia, even when healed, can affect the relative mobility of fascia layers away from the injured area, especially when movement is also restricted.
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spelling pubmed-47314652016-02-04 Ultrasound Evaluation of the Combined Effects of Thoracolumbar Fascia Injury and Movement Restriction in a Porcine Model Bishop, James H. Fox, James R. Maple, Rhonda Loretan, Caitlin Badger, Gary J. Henry, Sharon M. Vizzard, Margaret A. Langevin, Helene M. PLoS One Research Article The persistence of back pain following acute back “sprains” is a serious public health problem with poorly understood pathophysiology. The recent finding that human subjects with chronic low back pain (LBP) have increased thickness and decreased mobility of the thoracolumbar fascia measured with ultrasound suggest that the fasciae of the back may be involved in LBP pathophysiology. This study used a porcine model to test the hypothesis that similar ultrasound findings can be produced experimentally in a porcine model by combining a local injury of fascia with movement restriction using a “hobble” device linking one foot to a chest harness for 8 weeks. Ultrasound measurements of thoracolumbar fascia thickness and shear plane mobility (shear strain) during passive hip flexion were made at the 8 week time point on the non-intervention side (injury and/or hobble). Injury alone caused both an increase in fascia thickness (p = .007) and a decrease in fascia shear strain on the non-injured side (p = .027). Movement restriction alone did not change fascia thickness but did decrease shear strain on the non-hobble side (p = .024). The combination of injury plus movement restriction had additive effects on reducing fascia mobility with a 52% reduction in shear strain compared with controls and a 28% reduction compared to movement restriction alone. These results suggest that a back injury involving fascia, even when healed, can affect the relative mobility of fascia layers away from the injured area, especially when movement is also restricted. Public Library of Science 2016-01-28 /pmc/articles/PMC4731465/ /pubmed/26820883 http://dx.doi.org/10.1371/journal.pone.0147393 Text en © 2016 Bishop et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Bishop, James H.
Fox, James R.
Maple, Rhonda
Loretan, Caitlin
Badger, Gary J.
Henry, Sharon M.
Vizzard, Margaret A.
Langevin, Helene M.
Ultrasound Evaluation of the Combined Effects of Thoracolumbar Fascia Injury and Movement Restriction in a Porcine Model
title Ultrasound Evaluation of the Combined Effects of Thoracolumbar Fascia Injury and Movement Restriction in a Porcine Model
title_full Ultrasound Evaluation of the Combined Effects of Thoracolumbar Fascia Injury and Movement Restriction in a Porcine Model
title_fullStr Ultrasound Evaluation of the Combined Effects of Thoracolumbar Fascia Injury and Movement Restriction in a Porcine Model
title_full_unstemmed Ultrasound Evaluation of the Combined Effects of Thoracolumbar Fascia Injury and Movement Restriction in a Porcine Model
title_short Ultrasound Evaluation of the Combined Effects of Thoracolumbar Fascia Injury and Movement Restriction in a Porcine Model
title_sort ultrasound evaluation of the combined effects of thoracolumbar fascia injury and movement restriction in a porcine model
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4731465/
https://www.ncbi.nlm.nih.gov/pubmed/26820883
http://dx.doi.org/10.1371/journal.pone.0147393
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