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Beyer Benoît - One of the best experts on this subject based on the ideXlab platform.
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Contribution to 3D modelling of the human thorax in breathing movement : in vivo analysis of thorax joint kinematics
2016Co-Authors: Beyer BenoîtAbstract:La respiration est un phénomène vital qui implique une synergie entre diverses structures anatomiques qui constituent le thorax. La physiologie articulaire reste un parent pauvre de la physiologie et la littérature concernant la quantification de la cinématique 3D des articulations du thorax durant le mouvement respiratoire est rare. Ce travail se concentre sur le développement et l'application d'une méthodologie permettant de répondre à cet objectif. La méthode développée combine le traitement de données tomodensitométriques réalisées à trois volumes pulmonaires différents et des techniques d'infographies. Les amplitudes (ROMs) et axes de mouvements (axe hélicoïdaux moyen, AHMs) ont été obtenus au niveau des articulations costo-vertébrales de 12 sujets asymptomatiques. En résumé, les amplitudes diminuent graduellement dans les étages inférieurs ; le volume pulmonaire et l'étage costal influencent significativement les amplitudes costales ; l'orientation des AHMs ne diffère pas entre les étages costaux. En complément, la méthode a été appliquée pour un échantillon de 10 patients atteints de mucoviscidose. La condition pathologique influençait significativement les amplitudes de mouvements mais pas l'orientation des AHMs. Enfin, le déplacement sternal, les variations de l'angle sternal et la cinématique des articulations sternocostales a été analysée. Les déplacements angulaires des côtes par rapport au sternum diminuaient dans les étages inférieurs comme au niveau des articulations costo-vertébrales. L'orientation des AHMs des articulations sternocostales ne différait pas entre les étages. Une corrélation linéaire a été mise en évidence entre les déplacements verticaux du sternum et les amplitudes de mouvement costales au niveau costo-vertébral et sternocostal. Ce travail contribue de façon substantielle à la modélisation 3D du thorax humain durant le mouvement respiratoire d'un point de vue qualitatif et quantitatifBreathing is a vital phenomenon that implies synergy of various anatomical structures that constitute the thorax. Joint physiology remains a relatively poorly-known component of the overall thorax physiology. Quantitative literature related to in vivo thorax kinematics during breathing is scarce. The present work focuses specifically on developing and applying a methodology to reach this goal. The developed method combined processing of CT data obtained at different lung volumes and infographic techniques. Detailed ranges of motion (ROMs) and axes of movement (mean helical axes, MHAs) were obtained at Costovertebral Joints in 12 asymptomatic subjects; rib ROMs gradually decrease with increasing rib number; lung volume and rib level have a significant influence on rib ROM; MHAs did not differ between rib levels. In addition, the method was applied on a sample of 10 patients with cystic fibrosis. The pathological condition significantly influenced CVJ ROMs while the orientation of the MHAs did not differ. Finally, the sternal displacement, sternal angle variations and sternocostal Joints (SCJ at rib1 to 7) kinematics during breathing motion were analyzed. Rib ranges of motion relative to sternum decreased with increasing rib number similarly to CVJ. Orientation of the MHAs did not differ between SCJ levels. A significant linear correlation was demonstrated between sternum vertical displacement and rib ranges of motion at both CVJ and SCJ. The present work substantially contributes to 3D modelling of human thorax in breathing at a joint level both qualitatively and quantitativel
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Relationship between Costovertebral joint kinematics and lung volume in supine humans.
'Elsevier BV', 2016Co-Authors: Beyer Benoît, Van Sint Jan Serge, Chèze Laurence, Sholukha Victor, Feipel VéroniqueAbstract:This study investigates the relationship between the motion of the first ten Costovertebral Joints (CVJ) and lung volume over the inspiratory capacity (IC) using detailed kinematic analysis in a sample of 12 asymptomatic subjects. Retrospective codified spiral-CT data obtained at total lung capacity (TLC), middle of inspiratory capacity (MIC) and at functional residual capacity (FRC) were analysed. CVJ 3D kinematics were processed using previously-published methods. We tested the influence of the side, CVJ level and lung volume on CVJ kinematics. In addition, the correlations between anthropologic/pulmonary variables and CVJ kinematics were analysed. No linear correlation was found between lung volumes and CVJ kinematics. Major findings concerning 3D kinematics can be summarized as follows: 1) Ranges-of-motion decrease gradually with increasing CVJ level; 2) rib displacements are significantly reduced at lung volumes above the MIC and do not differ between CVJ levels; 3) the axes of rotation of the ribs are similarly oriented for all CVJ levels.SCOPUS: ar.jinfo:eu-repo/semantics/publishe
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Contribution to 3D modelling of the human thorax in breathing movement: In vivo analysis of thorax joint kinematics: Contribution à la modélisation 3D du thorax humain durant le mouvement respiratoire: Analyse in vivo de la cinématique des articulati
Université libre de Bruxelles Faculté de Médecine – Sciences biomédicales Bruxelles, 2016Co-Authors: Beyer BenoîtAbstract:Breathing is a vital phenomenon that implies synergy of various anatomical structures that constitute the thorax. Joint physiology remains a relatively poorly-known component of the overall thorax physiology. Quantitative literature related to in vivo thorax kinematics during breathing is scarce. The present work focuses specifically on developing and applying a methodology to reach this goal. The developed method combined processing of CT data obtained at different lung volumes and infographic techniques. Detailed ranges of motion (ROMs) and axes of movement (mean helical axes, MHAs) were obtained at Costovertebral Joints in 12 asymptomatic subjects; rib ROMs gradually decrease with increasing rib number; lung volume and rib level have a significant influence on rib ROM; MHAs did not differ between rib levels. In addition, the method was applied on a sample of 10 patients with cystic fibrosis. The pathological condition significantly influenced CVJ ROMs while the orientation of the MHAs did not differ. Finally, the sternal displacement, sternal angle variations and sternocostal Joints (SCJ at rib1 to 7) kinematics during breathing motion were analyzed. Rib ranges of motion relative to sternum decreased with increasing rib number similarly to CVJ. Orientation of the MHAs did not differ between SCJ levels. A significant linear correlation was demonstrated between sternum vertical displacement and rib ranges of motion at both CVJ and SCJ. The present work substantially contributes to 3D modelling of human thorax in breathing at a joint level both qualitatively and quantitatively.Doctorat en Sciences biomédicales et pharmaceutiques (Médecine)info:eu-repo/semantics/nonPublishe
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Contribution à la modélisation 3D du thorax humain durant le mouvement respiratoire : analyse in vivo de la cinématique des articulations du thorax
HAL CCSD, 2016Co-Authors: Beyer BenoîtAbstract:Breathing is a vital phenomenon that implies synergy of various anatomical structures that constitute the thorax. Joint physiology remains a relatively poorly-known component of the overall thorax physiology. Quantitative literature related to in vivo thorax kinematics during breathing is scarce. The present work focuses specifically on developing and applying a methodology to reach this goal. The developed method combined processing of CT data obtained at different lung volumes and infographic techniques. Detailed ranges of motion (ROMs) and axes of movement (mean helical axes, MHAs) were obtained at Costovertebral Joints in 12 asymptomatic subjects; rib ROMs gradually decrease with increasing rib number; lung volume and rib level have a significant influence on rib ROM; MHAs did not differ between rib levels. In addition, the method was applied on a sample of 10 patients with cystic fibrosis. The pathological condition significantly influenced CVJ ROMs while the orientation of the MHAs did not differ. Finally, the sternal displacement, sternal angle variations and sternocostal Joints (SCJ at rib1 to 7) kinematics during breathing motion were analyzed. Rib ranges of motion relative to sternum decreased with increasing rib number similarly to CVJ. Orientation of the MHAs did not differ between SCJ levels. A significant linear correlation was demonstrated between sternum vertical displacement and rib ranges of motion at both CVJ and SCJ. The present work substantially contributes to 3D modelling of human thorax in breathing at a joint level both qualitatively and quantitativelyLa respiration est un phénomène vital qui implique une synergie entre diverses structures anatomiques qui constituent le thorax. La physiologie articulaire reste un parent pauvre de la physiologie et la littérature concernant la quantification de la cinématique 3D des articulations du thorax durant le mouvement respiratoire est rare. Ce travail se concentre sur le développement et l'application d'une méthodologie permettant de répondre à cet objectif. La méthode développée combine le traitement de données tomodensitométriques réalisées à trois volumes pulmonaires différents et des techniques d'infographies. Les amplitudes (ROMs) et axes de mouvements (axe hélicoïdaux moyen, AHMs) ont été obtenus au niveau des articulations costo-vertébrales de 12 sujets asymptomatiques. En résumé, les amplitudes diminuent graduellement dans les étages inférieurs ; le volume pulmonaire et l'étage costal influencent significativement les amplitudes costales ; l'orientation des AHMs ne diffère pas entre les étages costaux. En complément, la méthode a été appliquée pour un échantillon de 10 patients atteints de mucoviscidose. La condition pathologique influençait significativement les amplitudes de mouvements mais pas l'orientation des AHMs. Enfin, le déplacement sternal, les variations de l'angle sternal et la cinématique des articulations sternocostales a été analysée. Les déplacements angulaires des côtes par rapport au sternum diminuaient dans les étages inférieurs comme au niveau des articulations costo-vertébrales. L'orientation des AHMs des articulations sternocostales ne différait pas entre les étages. Une corrélation linéaire a été mise en évidence entre les déplacements verticaux du sternum et les amplitudes de mouvement costales au niveau costo-vertébral et sternocostal. Ce travail contribue de façon substantielle à la modélisation 3D du thorax humain durant le mouvement respiratoire d'un point de vue qualitatif et quantitati
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Modelisation du thorax: cinematique des complexes articulaires costo-vertébraux
2013Co-Authors: Beyer Benoît, Van Sint Jan Serge, Sholukha Victor, Coupier Jérôme, Snoeck Olivier, Moiseev Fedor, Dugailly Pierre-michel, Salvia Patrick, Rooze Marcel, Feipel VéroniqueAbstract:Introduction: Les articulation costo-vertébrales sont des complexes anatomiques impliqués mécaniquement, à la fois dans la fonction respiratoire et dans la stabilité du rachis thoracique [1, 2]. Ces dernières décennies le complexe articulaire costo-vertébral a été l'objet de plusieurs études dans le but d'améliorer la compréhension du comportement mécanique du thorax. Les études expérimentales en rapport avec les articulations costo-vertébrales rapportent des données in vitro lors de tests de compressions [3, 4] ou des analyses de variations de volume globaux [5].Matériel et méthodes: Dans cette présentation, des images tomodensitométriques in vivo ont été obtenu chez un sujet asymptomatique. Le sujet a maintenu une pause respiratoire à trois volumes pulmonaires différents (depuis la capacité pulmonaire totale (CPT) à la capacité résiduelle fonctionnelle (CRF)).La méthode de fusion de données incluant les modèles 3D ainsi que l'analyse cinématique a été utilisé afin d'obtenir une visualisation 3D des complexes articulaires costo-vertébraux. La procédure a été réalisé à partir de palpation virtuelle [6] à l'aide d'un logiciel spécifiquement adapté appelé lhpFusionBox [7]. La cinématique a été mesurée à partir de la méthode OVP (orientation vector position) et du calcul des axes hélicoïdaux.Résultats: La représentation des axes hélicoïdaux a été obtenu. Le déplacement des articulation costo-vertébrales a été interpolé entre les positions discrètes. Un nouveau référentiel anatomique spécifique des côtes est proposé dans le but de représenter leur mouvement. L'amplitude de mouvement des septs côtes vraies et des vertèbres associées a été mesuré.Discussion-Conclusion: Cette méthode de traitement de données permet une représentation avancé des mouvements des os, de la représentation de la cinématique et de l'axe hélicoïdal. Les paramètres de l'axe hélicoïdal du complexe costo-vertébral donnent une nouvelle opportunité de travail. Le recueil et le traitement de données supplémentaires est actuellement en cours.1. Oda, I. et al. Biomechanical role of the posterior elements, Costovertebral Joints, and rib cage in the stability of the thoracic spine. Spine (Phila Pa 1976), 1996. 21(12): p. 1423-9.2. Andriacchi, T. et al. A model for studies of mechanical interactions between the human spine and rib cage. J Biomech, 1974. 7(6): p. 497-507.3. Lemosse, D. et al. Characterization of the mechanical behaviour parameters of the costo-vertebral joint. Eur Spine J, 1998. 7(1): p. 16-23.4. Duprey, S. et al. Biomechanical properties of the Costovertebral joint. Med Eng Phys, 2010. 32(2): p. 222-7.5. Cala, S.J. et al. Chest wall and lung volume estimation by optical reflectance motion analysis. J Appl Physiol, 1996. 81(6): p. 2680-9.6. Van Sint Jan, S. and U. Della Croce, Accurate palpation of skeletal landmark locations: why standardized definitions are necessary. A proposal. Clinical Biomechanics, 2005. 20: p. 659-660.7. Viceconti, M. et al. The multimod application framework: a rapid application development tool for computer aided medicine. Comput Methods Programs Biomed, 2007. 85(2): p. 138-51. info:eu-repo/semantics/nonPublishe
Benoît Beyer - One of the best experts on this subject based on the ideXlab platform.
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Contribution to 3D modelling of the human thorax in breathing movement : in vivo analysis of thorax joint kinematics
2016Co-Authors: Benoît BeyerAbstract:Breathing is a vital phenomenon that implies synergy of various anatomical structures that constitute the thorax. Joint physiology remains a relatively poorly-known component of the overall thorax physiology. Quantitative literature related to in vivo thorax kinematics during breathing is scarce. The present work focuses specifically on developing and applying a methodology to reach this goal. The developed method combined processing of CT data obtained at different lung volumes and infographic techniques. Detailed ranges of motion (ROMs) and axes of movement (mean helical axes, MHAs) were obtained at Costovertebral Joints in 12 asymptomatic subjects; rib ROMs gradually decrease with increasing rib number; lung volume and rib level have a significant influence on rib ROM; MHAs did not differ between rib levels. In addition, the method was applied on a sample of 10 patients with cystic fibrosis. The pathological condition significantly influenced CVJ ROMs while the orientation of the MHAs did not differ. Finally, the sternal displacement, sternal angle variations and sternocostal Joints (SCJ at rib1 to 7) kinematics during breathing motion were analyzed. Rib ranges of motion relative to sternum decreased with increasing rib number similarly to CVJ. Orientation of the MHAs did not differ between SCJ levels. A significant linear correlation was demonstrated between sternum vertical displacement and rib ranges of motion at both CVJ and SCJ. The present work substantially contributes to 3D modelling of human thorax in breathing at a joint level both qualitatively and quantitatively
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Relationship between Costovertebral joint kinematics and lung volume in supine humans
Respiratory Physiology and Neurobiology, 2016Co-Authors: Benoît Beyer, Victor Sholukha, Serge Van Sint Jan, Laurence Cheze, Véronique FeipelAbstract:This study investigates the relationship between the motion of the first ten Costovertebral Joints (CVJ) and lung volume over the inspiratory capacity (IC) using detailed kinematic analysis in a sample of 12 asymptomatic subjects. Retrospective codified spiral-CT data obtained at total lung capacity (TLC), middle of inspiratory capacity (MIC) and at functional residual capacity (FRC) were analysed. CVJ 3D kinematics were processed using previously-published methods. We tested the influence of the side, CVJ level and lung volume on CVJ kinematics. In addition, the correlations between anthropologic/pulmonary variables and CVJ kinematics were analysed. No linear correlation was found between lung volumes and CVJ kinematics. Major findings concerning 3D kinematics can be summarized as follows: 1) Ranges-of-motion decrease gradually with increasing CVJ level; 2) rib displacements are significantly reduced at lung volumes above the MIC and do not differ between CVJ levels; 3) the axes of rotation of the ribs are similarly oriented for all CVJ levels.
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Effect of anatomical landmark perturbation on mean helical axis parameters of in vivo upper Costovertebral Joints.
Journal of biomechanics, 2014Co-Authors: Benoît Beyer, Victor Sholukha, Patrick Salvia, Marcel Rooze, Véronique Feipel, Serge Van Sint JanAbstract:The literature concerning quantification of Costovertebral joint (CVJ) motion under in vivo conditions is scarce. Most papers concerning this topic are related to ex vivo loading conditions. In vivo protocols are available from the literature to determine rib and vertebra kinematics but new developments are needed to improve data processing concerning CVJ behaviour obtained from discrete breathing positions showing limiting ranges-of-motion and sensitive to noise. Data from previous work were used to implement a method analyzing mean helical axis (MHA) and pivot point parameters of the CVJ complexes. Several levels of noises were estimated within Monte-Carlo simulations to optimize MHA results. MHA parameters were then used to transform and define a CVJ-specific local coordinate system. This study proposes an improvement for CVJ kinematics processing and description from in vivo data obtained from computed tomography. This methodology emphasizes the possibility to work with variability of MHA parameters using Monte-Carlo procedures on anatomical landmark coordinates and to define a local coordinate system from this particular joint behaviour. Results from the CVJ joint model are closer to a hinge joint (secondary motions inferior to 3°) when anatomical frames are expressed from MHA orientation. MHA orientation and position data obtained from the proposed method are relevant according to angular dispersion obtained (from 7.5° to 13.9°) and therefore relevant to define behaviour of CVJ.
Serge Van Sint Jan - One of the best experts on this subject based on the ideXlab platform.
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Relationship between Costovertebral joint kinematics and lung volume in supine humans
Respiratory Physiology and Neurobiology, 2016Co-Authors: Benoît Beyer, Victor Sholukha, Serge Van Sint Jan, Laurence Cheze, Véronique FeipelAbstract:This study investigates the relationship between the motion of the first ten Costovertebral Joints (CVJ) and lung volume over the inspiratory capacity (IC) using detailed kinematic analysis in a sample of 12 asymptomatic subjects. Retrospective codified spiral-CT data obtained at total lung capacity (TLC), middle of inspiratory capacity (MIC) and at functional residual capacity (FRC) were analysed. CVJ 3D kinematics were processed using previously-published methods. We tested the influence of the side, CVJ level and lung volume on CVJ kinematics. In addition, the correlations between anthropologic/pulmonary variables and CVJ kinematics were analysed. No linear correlation was found between lung volumes and CVJ kinematics. Major findings concerning 3D kinematics can be summarized as follows: 1) Ranges-of-motion decrease gradually with increasing CVJ level; 2) rib displacements are significantly reduced at lung volumes above the MIC and do not differ between CVJ levels; 3) the axes of rotation of the ribs are similarly oriented for all CVJ levels.
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Effect of anatomical landmark perturbation on mean helical axis parameters of in vivo upper Costovertebral Joints.
Journal of biomechanics, 2014Co-Authors: Benoît Beyer, Victor Sholukha, Patrick Salvia, Marcel Rooze, Véronique Feipel, Serge Van Sint JanAbstract:The literature concerning quantification of Costovertebral joint (CVJ) motion under in vivo conditions is scarce. Most papers concerning this topic are related to ex vivo loading conditions. In vivo protocols are available from the literature to determine rib and vertebra kinematics but new developments are needed to improve data processing concerning CVJ behaviour obtained from discrete breathing positions showing limiting ranges-of-motion and sensitive to noise. Data from previous work were used to implement a method analyzing mean helical axis (MHA) and pivot point parameters of the CVJ complexes. Several levels of noises were estimated within Monte-Carlo simulations to optimize MHA results. MHA parameters were then used to transform and define a CVJ-specific local coordinate system. This study proposes an improvement for CVJ kinematics processing and description from in vivo data obtained from computed tomography. This methodology emphasizes the possibility to work with variability of MHA parameters using Monte-Carlo procedures on anatomical landmark coordinates and to define a local coordinate system from this particular joint behaviour. Results from the CVJ joint model are closer to a hinge joint (secondary motions inferior to 3°) when anatomical frames are expressed from MHA orientation. MHA orientation and position data obtained from the proposed method are relevant according to angular dispersion obtained (from 7.5° to 13.9°) and therefore relevant to define behaviour of CVJ.
Kiyoshi Kaneda - One of the best experts on this subject based on the ideXlab platform.
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an in vitro human cadaveric study investigating the biomechanical properties of the thoracic spine
Spine, 2002Co-Authors: Itaru Oda, Kuniyoshi Abumi, Kiyoshi Kaneda, Bryan W Cunningham, Paul C McafeeAbstract:STUDY DESIGN An in vitro human cadaveric study comparing the effects of anterior and posterior sequential destabilization conditions on thoracic functional unit mechanics was studied. OBJECTIVES To investigate the biomechanical properties of the human thoracic spine. SUMMARY OF BACKGROUND DATA Few studies have addressed the mechanical role of the Costovertebral Joints under torsion in the stability of the human thoracic spine. METHODS Sixteen functional spinal units with intact Costovertebral Joints were obtained from six human cadavers and randomized into two groups based on destabilization procedures: Group 1, anterior to posterior sequential resection; and Group 2, posterior to anterior sequential destabilization. Biomechanical testing was performed after each destabilization procedure, and the range of motion under maximum load was calculated. RESULTS Group 1: Under flexion-extension, lateral bending, and axial rotation loading, discectomy increased the range of motion by 193%, 74%, and 111%, respectively. Moreover, subsequent right rib head resection further increased the range of motion by 81%, 84%, and 72%, respectively. Group 2: Under all loading conditions laminectomy + medial facetectomy resulted in a 22-30% increase in range of motion. Subsequent total facetectomy led to an additional 15-28% increase in range of motion. CONCLUSION The rib head Joints serve as stabilizing structures to the human thoracic spine in the sagittal, coronal, and transverse planes. In anterior scoliosis surgery additional rib head resection after discectomy may achieve greater curve and rib hump correction. The lateral portion of the facet Joints plays an important role in providing spinal stability and should be preserved to minimize postoperative kyphotic deformity and segmental instability when performing decompressive wide laminectomy.
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Biomechanical role of the intervertebral disc and Costovertebral joint in stability of the thoracic spine. A canine model study.
Spine, 1999Co-Authors: Tatsuto Takeuchi, Itaru Oda, Kuniyoshi Abumi, Yasuhiro Shono, Kiyoshi KanedaAbstract:Study Design. Biomechanical evaluation was performed to investigate the stability of the thoracic spine. Unilateral resection of the intervertebral disc, the rib head joint, and the costotransverse joint were sequentially performed, and nondestructive cyclic loading tests were conducted at each injury stage to examine the roles of the intervertebral disc and the Costovertebral joint of the thoracic spine. The effects of each resection were three-dimensionally analyzed as the main motion and the associated coupled motions. Objective. To examine the role of the intervertebral disc and the Costovertebral joint in stability of the thoracic spine. Summary of Background Data. The effects of unilateral resection of the intervertebral disc and the Costovertebral Joints in the thoracic spine with the rib cage have not been documented three-dimensionally in a biomechanical study. Materials and Methods. Ten canine rib cage-thoracic spine complexes, consisting of the sixth to eighth ribs, the sternum and T5-T8 vertebrae, were used. Six pure moments along three axes, flexion-extension, lateral bending, and axial rotation, were applied to the specimen, and the angular deformation between T6-T7 was recorded by a stereophotogrammetric method. After the intact specimens were tested, staged resections were conducted in the following manner: partial resection of the T6-T7 intervertebral disc, performed as a resection of the anterior longitudinal ligament, the nucleus pulposus, and the annulus fibrosus on the approach side, leaving the posterior longitudinal ligament intact; resection of the right seventh rib head with the joint capsule: and resection of the right seventh costotransverse joint. At each stage, the main motion and associated coupled motions were determined three dimensionally. Results. The ranges of motion (ROM) in flexion-extension, lateral bending, and axial rotation were significantly increased after partial discectomy (P < 0.01). Moreover, along with large increases in the ROM of the main motions in left axial rotation and right lateral bending, coupled motions, expressed by right lateral bending and left axial rotation, showed marked increases after resection of the rib head joint (P < 0.05). The neutral zones also increased in lateral bending, axial rotation, and flexion-extension after partial discectomy (P < 0.01). A further increase in the neutral zone was observed in lateral bending after resection of the right seventh rib head (P < 0.01). Conclusions. in this canine spine model, the intervertebral disc regulates the stability of the thoracic spine in flexion-extension, lateral bending, and axial rotation. Moreover, the articulation of the rib head with the vertebral bodies provides stability to the thoracic spine in lateral bending and axial rotation. Unilateral resection of the rib head joint after partial discectomy on the same side produces significant coupled motions in lateral bending and axial rotation, resulting in a significant decrease in thoracic spinal stability, and integrity.
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Biomechanical role of the posterior elements, Costovertebral Joints, and rib cage in the stability of the thoracic spine.
Spine, 1996Co-Authors: Itaru Oda, Kuniyoshi Abumi, Yasuhiro Shono, Kiyoshi KanedaAbstract:STUDY DESIGN: This is a biomechanical study of the thoracic spine. Various ligaments and Joints were resected sequentially and nondestructive cyclic loading tests were performed. Effects of each resection were analyzed biomechanically. OBJECTIVES: To investigate the role of the posterior elements, Costovertebral Joints, and rib cage in the stability of the thoracic spine. SUMMARY OF BACKGROUND DATA: There have been no experimental studies concerning the mechanical interaction between the thoracic spine and rib cage. METHODS: Eight canine rib cage-thoracic spine complexes, consisting of the sixth to eighth ribs, sternum, and T5-T9 vertebrae, were used. Six pure moments along three axes were applied to the specimens, and angular deformation of T6-T7 was recorded. After testing the intact specimen, resection of the stabilizers was conducted incrementally in the following manner: 1) removal of the posterior elements at T6-T7, 2) resection of the bilateral seventh Costovertebral Joints, and finally, 3) destruction of the rib cage. The same loading tests were repeated at each stage. The ranges of motion and neutral zones were calculated by digitization. RESULTS: A large increase in the range of motion in flexion-extension was observed after resection of the posterior elements and in lateral bending and axial rotation after resection of the Costovertebral Joints. A significant increase in the neutral zone in lateral bending and axial rotation was observed after bilateral resection of the Costovertebral Joints and destruction of the rib cage. CONCLUSIONS: The Costovertebral Joints and rib cage play an important role in providing stability to the thoracic spine. The state of the Costovertebral Joints and rib cage should be assessed to evaluate the stability of the thoracic spine.
Véronique Feipel - One of the best experts on this subject based on the ideXlab platform.
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Relationship between Costovertebral joint kinematics and lung volume in supine humans
Respiratory Physiology and Neurobiology, 2016Co-Authors: Benoît Beyer, Victor Sholukha, Serge Van Sint Jan, Laurence Cheze, Véronique FeipelAbstract:This study investigates the relationship between the motion of the first ten Costovertebral Joints (CVJ) and lung volume over the inspiratory capacity (IC) using detailed kinematic analysis in a sample of 12 asymptomatic subjects. Retrospective codified spiral-CT data obtained at total lung capacity (TLC), middle of inspiratory capacity (MIC) and at functional residual capacity (FRC) were analysed. CVJ 3D kinematics were processed using previously-published methods. We tested the influence of the side, CVJ level and lung volume on CVJ kinematics. In addition, the correlations between anthropologic/pulmonary variables and CVJ kinematics were analysed. No linear correlation was found between lung volumes and CVJ kinematics. Major findings concerning 3D kinematics can be summarized as follows: 1) Ranges-of-motion decrease gradually with increasing CVJ level; 2) rib displacements are significantly reduced at lung volumes above the MIC and do not differ between CVJ levels; 3) the axes of rotation of the ribs are similarly oriented for all CVJ levels.
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Effect of anatomical landmark perturbation on mean helical axis parameters of in vivo upper Costovertebral Joints.
Journal of biomechanics, 2014Co-Authors: Benoît Beyer, Victor Sholukha, Patrick Salvia, Marcel Rooze, Véronique Feipel, Serge Van Sint JanAbstract:The literature concerning quantification of Costovertebral joint (CVJ) motion under in vivo conditions is scarce. Most papers concerning this topic are related to ex vivo loading conditions. In vivo protocols are available from the literature to determine rib and vertebra kinematics but new developments are needed to improve data processing concerning CVJ behaviour obtained from discrete breathing positions showing limiting ranges-of-motion and sensitive to noise. Data from previous work were used to implement a method analyzing mean helical axis (MHA) and pivot point parameters of the CVJ complexes. Several levels of noises were estimated within Monte-Carlo simulations to optimize MHA results. MHA parameters were then used to transform and define a CVJ-specific local coordinate system. This study proposes an improvement for CVJ kinematics processing and description from in vivo data obtained from computed tomography. This methodology emphasizes the possibility to work with variability of MHA parameters using Monte-Carlo procedures on anatomical landmark coordinates and to define a local coordinate system from this particular joint behaviour. Results from the CVJ joint model are closer to a hinge joint (secondary motions inferior to 3°) when anatomical frames are expressed from MHA orientation. MHA orientation and position data obtained from the proposed method are relevant according to angular dispersion obtained (from 7.5° to 13.9°) and therefore relevant to define behaviour of CVJ.
