The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
Richard Preuss - One of the best experts on this subject based on the ideXlab platform.
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Structural remodelling of the lumbar multifidus, thoracolumbar fascia and lateral abdominal wall perimuscular Connective Tissues: A cross-sectional and comparative ultrasound study
Journal of bodywork and movement therapies, 2020Co-Authors: Christian Larivière, Richard Preuss, Dany H. Gagnon, Hakim Mecheri, Sharon M HenryAbstract:Abstract Introduction With low back pain (LBP), remodelling of the lumbar soft Tissues involves both trunk muscles and neighbouring passive Connective Tissues. The aim of the present study was to compare three quantitative measures of these Tissues, using ultrasound imaging (USI), among healthy controls and individuals with LBP. Methods USI measures from 30 healthy subjects and 34 patients with non-acute LBP were compared between groups and sexes. The measures employed were (1) lumbar multifidus echogenicity (fatty/fibrosis infiltration) at three vertebral levels; (2) posterior layer thickness of the thoracolumbar fascia, and (3) thickness of the perimuscular Tissues surrounding the external oblique, internal oblique and transversus abdominis (TrA). Results USI measures of (1) multifidus echogenicity showed statistically significant changes between vertebral levels and sexes (females > males; p = 0.02); (2) differences in thoracolumbar fascia thickness approached statistical significance between groups (LBP > controls; p = 0.09) and sexes (females Discussion The thinner perimuscular Tissues surrounding the TrA in patients with LBP is a new finding, concurring with previous findings with regard to the lower activation of this deep muscle as well as more recent findings on other perimuscular tissue. Conclusion Overall, USI measures were sensitive to different potential changes (pain status, sex, vertebral level), and this is useful in studying the remodelling of various soft Tissues of the trunk.
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Structural remodeling of the lumbar multifidus, thoracolumbar fascia and lateral abdominal wall perimuscular Connective Tissues: Medium-term test-retest reliability of ultrasound measures
Journal of Bodywork and Movement Therapies, 1Co-Authors: Christian Larivière, Dany H. Gagnon, Richard PreussAbstract:Abstract Introduction Growing interest is being paid to the lumbar multifidus (LM) intramuscular fatty infiltrations and fibrosis that are secondary to low back pain as well to the remodeling of perimuscular Connective Tissues (fasciae) such as the thoracolumbar fascia and fascia sheets separating the abdominal wall muscles. Magnetic resonance imaging and computed tomography have traditionally been used but rehabilitative ultrasound imaging (RUSI) is much more affordable and practical, which can accelerate research and clinical applications on this topic. The aim of this study was to test the medium-term (8 weeks) test-retest reliability of the corresponding RUSI measures. Methods Thirty-four participants with non-acute LBP and 30 healthy controls performed a RUSI assessment before and after an 8-week time interval. LM echogenicity was quantified to assess fatty infiltrations and fibrosis while fasciae were quantified with thickness measures. Relative and absolute reliability were estimated using the generalizability theory as a framework, allowing to partition the different sources of error. Results Overall, the reliability findings were quite acceptable, with negligible systematic effects. Excellent relative reliability was reached in half of the investigated RUSI measures, particularly when averaging measures across trials. However, neither relative, nor absolute reliability results support the use of these RUSI measurements on an individual basis (e.g. clinical applications) but they are useful on a group basis (e.g. research applications). Discussion The different sources of error were distributed unequally across RUSI measures, pointing to different measurement strategies to mitigate the underlying errors. Conclusions The use of the generalizability theory allowed identifying the sources of error of the different RUSI measures. For each category of measure, depending of the distribution of errors, it was possible to recommend specific measurement strategies to mitigate them.
Christian Larivière - One of the best experts on this subject based on the ideXlab platform.
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Structural remodelling of the lumbar multifidus, thoracolumbar fascia and lateral abdominal wall perimuscular Connective Tissues: A cross-sectional and comparative ultrasound study
Journal of bodywork and movement therapies, 2020Co-Authors: Christian Larivière, Richard Preuss, Dany H. Gagnon, Hakim Mecheri, Sharon M HenryAbstract:Abstract Introduction With low back pain (LBP), remodelling of the lumbar soft Tissues involves both trunk muscles and neighbouring passive Connective Tissues. The aim of the present study was to compare three quantitative measures of these Tissues, using ultrasound imaging (USI), among healthy controls and individuals with LBP. Methods USI measures from 30 healthy subjects and 34 patients with non-acute LBP were compared between groups and sexes. The measures employed were (1) lumbar multifidus echogenicity (fatty/fibrosis infiltration) at three vertebral levels; (2) posterior layer thickness of the thoracolumbar fascia, and (3) thickness of the perimuscular Tissues surrounding the external oblique, internal oblique and transversus abdominis (TrA). Results USI measures of (1) multifidus echogenicity showed statistically significant changes between vertebral levels and sexes (females > males; p = 0.02); (2) differences in thoracolumbar fascia thickness approached statistical significance between groups (LBP > controls; p = 0.09) and sexes (females Discussion The thinner perimuscular Tissues surrounding the TrA in patients with LBP is a new finding, concurring with previous findings with regard to the lower activation of this deep muscle as well as more recent findings on other perimuscular tissue. Conclusion Overall, USI measures were sensitive to different potential changes (pain status, sex, vertebral level), and this is useful in studying the remodelling of various soft Tissues of the trunk.
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Structural remodeling of the lumbar multifidus, thoracolumbar fascia and lateral abdominal wall perimuscular Connective Tissues: Medium-term test-retest reliability of ultrasound measures
Journal of Bodywork and Movement Therapies, 1Co-Authors: Christian Larivière, Dany H. Gagnon, Richard PreussAbstract:Abstract Introduction Growing interest is being paid to the lumbar multifidus (LM) intramuscular fatty infiltrations and fibrosis that are secondary to low back pain as well to the remodeling of perimuscular Connective Tissues (fasciae) such as the thoracolumbar fascia and fascia sheets separating the abdominal wall muscles. Magnetic resonance imaging and computed tomography have traditionally been used but rehabilitative ultrasound imaging (RUSI) is much more affordable and practical, which can accelerate research and clinical applications on this topic. The aim of this study was to test the medium-term (8 weeks) test-retest reliability of the corresponding RUSI measures. Methods Thirty-four participants with non-acute LBP and 30 healthy controls performed a RUSI assessment before and after an 8-week time interval. LM echogenicity was quantified to assess fatty infiltrations and fibrosis while fasciae were quantified with thickness measures. Relative and absolute reliability were estimated using the generalizability theory as a framework, allowing to partition the different sources of error. Results Overall, the reliability findings were quite acceptable, with negligible systematic effects. Excellent relative reliability was reached in half of the investigated RUSI measures, particularly when averaging measures across trials. However, neither relative, nor absolute reliability results support the use of these RUSI measurements on an individual basis (e.g. clinical applications) but they are useful on a group basis (e.g. research applications). Discussion The different sources of error were distributed unequally across RUSI measures, pointing to different measurement strategies to mitigate the underlying errors. Conclusions The use of the generalizability theory allowed identifying the sources of error of the different RUSI measures. For each category of measure, depending of the distribution of errors, it was possible to recommend specific measurement strategies to mitigate them.
Kyriacos A. Athanasiou - One of the best experts on this subject based on the ideXlab platform.
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Tensile Properties, Collagen Content, and Crosslinks in Connective Tissues of the Immature Knee Joint
2013Co-Authors: Sriram V. Eleswarapu, Donald J. Responte, Kyriacos A. AthanasiouAbstract:Background: The major Connective Tissues of the knee joint act in concert during locomotion to provide joint stability, smooth articulation, shock absorption, and distribution of mechanical stresses. These functions are largely conferred by the intrinsic material properties of the Tissues, which are in turn determined by biochemical composition. A thorough understanding of the structure-function relationships of the Connective Tissues of the knee joint is needed to provide design parameters for efforts in tissue engineering. Methodology/Principal Findings: The objective of this study was to perform a comprehensive characterization of the tensile properties, collagen content, and pyridinoline crosslink abundance of condylar cartilage, patellar cartilage, medial and lateral menisci, cranial and caudal cruciate ligaments (analogous to anterior and posterior cruciate ligaments in humans, respectively), medial and lateral collateral ligaments, and patellar ligament from immature bovine calves. Tensile stiffness and strength were greatest in the menisci and patellar ligament, and lowest in the hyaline cartilages and cruciate ligaments; these tensile results reflected trends in collagen content. Pyridinoline crosslinks were found in every tissue despite the relative immaturity of the joints, and significant differences were observed among Tissues. Notably, for the cruciate ligaments and patellar ligament, crosslink density appeared more important in determining tensile stiffness than collagen content
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Tensile Properties, Collagen Content, and Crosslinks in Connective Tissues of the Immature Knee Joint
PloS one, 2011Co-Authors: Sriram V. Eleswarapu, Donald J. Responte, Kyriacos A. AthanasiouAbstract:Background The major Connective Tissues of the knee joint act in concert during locomotion to provide joint stability, smooth articulation, shock absorption, and distribution of mechanical stresses. These functions are largely conferred by the intrinsic material properties of the Tissues, which are in turn determined by biochemical composition. A thorough understanding of the structure-function relationships of the Connective Tissues of the knee joint is needed to provide design parameters for efforts in tissue engineering. Methodology/Principal Findings The objective of this study was to perform a comprehensive characterization of the tensile properties, collagen content, and pyridinoline crosslink abundance of condylar cartilage, patellar cartilage, medial and lateral menisci, cranial and caudal cruciate ligaments (analogous to anterior and posterior cruciate ligaments in humans, respectively), medial and lateral collateral ligaments, and patellar ligament from immature bovine calves. Tensile stiffness and strength were greatest in the menisci and patellar ligament, and lowest in the hyaline cartilages and cruciate ligaments; these tensile results reflected trends in collagen content. Pyridinoline crosslinks were found in every tissue despite the relative immaturity of the joints, and significant differences were observed among Tissues. Notably, for the cruciate ligaments and patellar ligament, crosslink density appeared more important in determining tensile stiffness than collagen content. Conclusions/Significance To our knowledge, this study is the first to examine tensile properties, collagen content, and pyridinoline crosslink abundance in a direct head-to-head comparison among all of the major Connective Tissues of the knee. This is also the first study to report results for pyridinoline crosslink density that suggest its preferential role over collagen in determining tensile stiffness for certain Tissues.
Sharon M Henry - One of the best experts on this subject based on the ideXlab platform.
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Structural remodelling of the lumbar multifidus, thoracolumbar fascia and lateral abdominal wall perimuscular Connective Tissues: A cross-sectional and comparative ultrasound study
Journal of bodywork and movement therapies, 2020Co-Authors: Christian Larivière, Richard Preuss, Dany H. Gagnon, Hakim Mecheri, Sharon M HenryAbstract:Abstract Introduction With low back pain (LBP), remodelling of the lumbar soft Tissues involves both trunk muscles and neighbouring passive Connective Tissues. The aim of the present study was to compare three quantitative measures of these Tissues, using ultrasound imaging (USI), among healthy controls and individuals with LBP. Methods USI measures from 30 healthy subjects and 34 patients with non-acute LBP were compared between groups and sexes. The measures employed were (1) lumbar multifidus echogenicity (fatty/fibrosis infiltration) at three vertebral levels; (2) posterior layer thickness of the thoracolumbar fascia, and (3) thickness of the perimuscular Tissues surrounding the external oblique, internal oblique and transversus abdominis (TrA). Results USI measures of (1) multifidus echogenicity showed statistically significant changes between vertebral levels and sexes (females > males; p = 0.02); (2) differences in thoracolumbar fascia thickness approached statistical significance between groups (LBP > controls; p = 0.09) and sexes (females Discussion The thinner perimuscular Tissues surrounding the TrA in patients with LBP is a new finding, concurring with previous findings with regard to the lower activation of this deep muscle as well as more recent findings on other perimuscular tissue. Conclusion Overall, USI measures were sensitive to different potential changes (pain status, sex, vertebral level), and this is useful in studying the remodelling of various soft Tissues of the trunk.
Dany H. Gagnon - One of the best experts on this subject based on the ideXlab platform.
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Structural remodelling of the lumbar multifidus, thoracolumbar fascia and lateral abdominal wall perimuscular Connective Tissues: A cross-sectional and comparative ultrasound study
Journal of bodywork and movement therapies, 2020Co-Authors: Christian Larivière, Richard Preuss, Dany H. Gagnon, Hakim Mecheri, Sharon M HenryAbstract:Abstract Introduction With low back pain (LBP), remodelling of the lumbar soft Tissues involves both trunk muscles and neighbouring passive Connective Tissues. The aim of the present study was to compare three quantitative measures of these Tissues, using ultrasound imaging (USI), among healthy controls and individuals with LBP. Methods USI measures from 30 healthy subjects and 34 patients with non-acute LBP were compared between groups and sexes. The measures employed were (1) lumbar multifidus echogenicity (fatty/fibrosis infiltration) at three vertebral levels; (2) posterior layer thickness of the thoracolumbar fascia, and (3) thickness of the perimuscular Tissues surrounding the external oblique, internal oblique and transversus abdominis (TrA). Results USI measures of (1) multifidus echogenicity showed statistically significant changes between vertebral levels and sexes (females > males; p = 0.02); (2) differences in thoracolumbar fascia thickness approached statistical significance between groups (LBP > controls; p = 0.09) and sexes (females Discussion The thinner perimuscular Tissues surrounding the TrA in patients with LBP is a new finding, concurring with previous findings with regard to the lower activation of this deep muscle as well as more recent findings on other perimuscular tissue. Conclusion Overall, USI measures were sensitive to different potential changes (pain status, sex, vertebral level), and this is useful in studying the remodelling of various soft Tissues of the trunk.
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Structural remodeling of the lumbar multifidus, thoracolumbar fascia and lateral abdominal wall perimuscular Connective Tissues: Medium-term test-retest reliability of ultrasound measures
Journal of Bodywork and Movement Therapies, 1Co-Authors: Christian Larivière, Dany H. Gagnon, Richard PreussAbstract:Abstract Introduction Growing interest is being paid to the lumbar multifidus (LM) intramuscular fatty infiltrations and fibrosis that are secondary to low back pain as well to the remodeling of perimuscular Connective Tissues (fasciae) such as the thoracolumbar fascia and fascia sheets separating the abdominal wall muscles. Magnetic resonance imaging and computed tomography have traditionally been used but rehabilitative ultrasound imaging (RUSI) is much more affordable and practical, which can accelerate research and clinical applications on this topic. The aim of this study was to test the medium-term (8 weeks) test-retest reliability of the corresponding RUSI measures. Methods Thirty-four participants with non-acute LBP and 30 healthy controls performed a RUSI assessment before and after an 8-week time interval. LM echogenicity was quantified to assess fatty infiltrations and fibrosis while fasciae were quantified with thickness measures. Relative and absolute reliability were estimated using the generalizability theory as a framework, allowing to partition the different sources of error. Results Overall, the reliability findings were quite acceptable, with negligible systematic effects. Excellent relative reliability was reached in half of the investigated RUSI measures, particularly when averaging measures across trials. However, neither relative, nor absolute reliability results support the use of these RUSI measurements on an individual basis (e.g. clinical applications) but they are useful on a group basis (e.g. research applications). Discussion The different sources of error were distributed unequally across RUSI measures, pointing to different measurement strategies to mitigate the underlying errors. Conclusions The use of the generalizability theory allowed identifying the sources of error of the different RUSI measures. For each category of measure, depending of the distribution of errors, it was possible to recommend specific measurement strategies to mitigate them.