The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
Martin Snow - One of the best experts on this subject based on the ideXlab platform.
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KNEE Joint Rotation ANGLE: A PREDICTOR OF PATHOLOGICAL TIBIAL TUBEROSITY-TROCHLEA GROOVE DISTANCE IN PATIENTS WITH PATELLA-FEMORAL PAIN AND INSTABILITY.
2018Co-Authors: K. Theivendran, Raj R Thakrar, R.l. Holder, Curtis Robb, Martin SnowAbstract:IntroductionPatellofemoral pain and instability can be quantified by using the tibial tuberosity to trochlea groove (TT-TG) distance with more than or equal to 20mm considered pathological requiring surgical correction. Aim of this study is to determine if knee Joint Rotation angle is predictive of a pathological TT-TG.MethodsOne hundred limbs were imaged from the pelvis to the foot using Computer Tomography (CT) scans in 50 patients with patellofemoral pain and instability. The TT-TG distance, femoral version, tibial torsion and knee Joint Rotation angle ((KJRA) were measured. Limbs were separated into pathological and non-pathological TT-TG. Significant differences in the measured angles between the pathological and non-pathological groups were estimated using the t test. The inter- and intraobserver variability of the measurement was performed. Logistic regression analysis was used to find the best combination of Rotational angle predictors for a pathological TT-TG.ResultsThe intraclass correlation coe...
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KNEE Joint Rotation ANGLE: A PREDICTOR OF PATHOLOGICAL TIBIAL TUBEROSITY-TROCHLEA GROOVE DISTANCE IN PATIENTS WITH PATELLA-FEMORAL PAIN AND INSTABILITY.
Journal of Bone and Joint Surgery-british Volume, 2013Co-Authors: K. Theivendran, Raj R Thakrar, R.l. Holder, Curtis Robb, Martin SnowAbstract:Introduction Patellofemoral pain and instability can be quantified by using the tibial tuberosity to trochlea groove (TT-TG) distance with more than or equal to 20mm considered pathological requiring surgical correction. Aim of this study is to determine if knee Joint Rotation angle is predictive of a pathological TT-TG. Methods One hundred limbs were imaged from the pelvis to the foot using Computer Tomography (CT) scans in 50 patients with patellofemoral pain and instability. The TT-TG distance, femoral version, tibial torsion and knee Joint Rotation angle ((KJRA) were measured. Limbs were separated into pathological and non-pathological TT-TG. Significant differences in the measured angles between the pathological and non-pathological groups were estimated using the t test. The inter- and intraobserver variability of the measurement was performed. Logistic regression analysis was used to find the best combination of Rotational angle predictors for a pathological TT-TG. Results The intraclass correlation coefficients for inter- and intraobserver variability of the measured parameters was higher than 0.94 for all measurements. A statistically significant difference (P=0.024) was found between the KJRA between the pathological (mean=10.6, SD=7.79 degrees) and the non-pathological group (mean=6.99, SD=5.06 degrees). Logistic regression analysis showed that both femoral version (P=0.03, OR = 0.95) and KJRA (P=0.004, OR=1.15) were, in combination, significant predictors of an abnormal TT-TG. Tibial torsion was not a significant predictor. Conclusion The KJRA can be used as an alternative measurement when the TT-TG distance cannot be measured as in cases of severe trochlea dysplasia and may act as a surrogate for pathological TT-TG.
S K Sinha - One of the best experts on this subject based on the ideXlab platform.
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age related differences in strain rate tensor of the medial gastrocnemius muscle during passive plantarflexion and active isometric contraction using velocity encoded mr imaging
Magnetic Resonance in Medicine, 2015Co-Authors: Usha Sinha, Vadim Malis, Robert Csapo, Ali Moghadasi, Ryuta Kinugasa, S K SinhaAbstract:Purpose The strain rate (SR) tensor measures the principal directions and magnitude of the instantaneous deformation; this study aims to track age related changes in the 2D SR tensor in the medial gastrocnemius during passive Joint Rotation and active isometric contraction.
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ankle morphology amplifies calcaneus movement relative to triceps surae muscle shortening
Journal of Applied Physiology, 2013Co-Authors: Robert Csapo, Ryuta Kinugasa, John A Hodgson, V R Edgerton, S K SinhaAbstract:The present study investigated the mechanical role of the dorsoventral curvature of the Achilles tendon in the conversion of the shortening of the plantarflexor muscles into ankle Joint Rotation. D...
Usha Sinha - One of the best experts on this subject based on the ideXlab platform.
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age related differences in strain rate tensor of the medial gastrocnemius muscle during passive plantarflexion and active isometric contraction using velocity encoded mr imaging
Magnetic Resonance in Medicine, 2015Co-Authors: Usha Sinha, Vadim Malis, Robert Csapo, Ali Moghadasi, Ryuta Kinugasa, S K SinhaAbstract:Purpose The strain rate (SR) tensor measures the principal directions and magnitude of the instantaneous deformation; this study aims to track age related changes in the 2D SR tensor in the medial gastrocnemius during passive Joint Rotation and active isometric contraction.
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age related differences in strain rate tensor of the medial gastrocnemius muscle during passive plantarflexion and active isometric contraction using velocity encoded mr imaging potential index of lateral force transmission
Magnetic Resonance in Medicine, 2015Co-Authors: Usha Sinha, Vadim Malis, Robert Csapo, Ali Moghadasi, Ryuta Kinugasa, Shantanu SinhaAbstract:Purpose The strain rate (SR) tensor measures the principal directions and magnitude of the instantaneous deformation; this study aims to track age-related changes in the 2D SR tensor in the medial gastrocnemius during passive Joint Rotation and active isometric contraction. Methods SR tensors were derived from velocity encoded magnetic resonance phase-contrast images in nine young (28 years) and eight senior (78 years) women. Strain rates along and in the cross-section of the fiber were calculated from the SR tensor and used to derive the out-plane SR. Age-related and regional differences in the SR eigenvalues, orientation, and the angle between the SR and muscle fiber (SR-fiber angle) were statistically analyzed. Results SR along the fiber was significantly different between the cohorts during isometric contraction with higher values in the young (P < 0.05). The SR-fiber angle was larger in the young for both motion types but this difference was not statistically significant. Significant regional differences in the SR indices was seen in passive Joint Rotation (P < 0.05) for both cohorts. Conclusion SR mapping reflects age-related and regional differences during active and passive motion respectively; this may arise from differences in contractility (active motion) and elastic properties (active and passive motion). Magn Reson Med, 2014. © 2014 Wiley Periodicals, Inc. Magn Reson Med 73:1852–1863, 2015. © 2014 Wiley Periodicals, Inc.
Robert Csapo - One of the best experts on this subject based on the ideXlab platform.
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age related differences in strain rate tensor of the medial gastrocnemius muscle during passive plantarflexion and active isometric contraction using velocity encoded mr imaging
Magnetic Resonance in Medicine, 2015Co-Authors: Usha Sinha, Vadim Malis, Robert Csapo, Ali Moghadasi, Ryuta Kinugasa, S K SinhaAbstract:Purpose The strain rate (SR) tensor measures the principal directions and magnitude of the instantaneous deformation; this study aims to track age related changes in the 2D SR tensor in the medial gastrocnemius during passive Joint Rotation and active isometric contraction.
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age related differences in strain rate tensor of the medial gastrocnemius muscle during passive plantarflexion and active isometric contraction using velocity encoded mr imaging potential index of lateral force transmission
Magnetic Resonance in Medicine, 2015Co-Authors: Usha Sinha, Vadim Malis, Robert Csapo, Ali Moghadasi, Ryuta Kinugasa, Shantanu SinhaAbstract:Purpose The strain rate (SR) tensor measures the principal directions and magnitude of the instantaneous deformation; this study aims to track age-related changes in the 2D SR tensor in the medial gastrocnemius during passive Joint Rotation and active isometric contraction. Methods SR tensors were derived from velocity encoded magnetic resonance phase-contrast images in nine young (28 years) and eight senior (78 years) women. Strain rates along and in the cross-section of the fiber were calculated from the SR tensor and used to derive the out-plane SR. Age-related and regional differences in the SR eigenvalues, orientation, and the angle between the SR and muscle fiber (SR-fiber angle) were statistically analyzed. Results SR along the fiber was significantly different between the cohorts during isometric contraction with higher values in the young (P < 0.05). The SR-fiber angle was larger in the young for both motion types but this difference was not statistically significant. Significant regional differences in the SR indices was seen in passive Joint Rotation (P < 0.05) for both cohorts. Conclusion SR mapping reflects age-related and regional differences during active and passive motion respectively; this may arise from differences in contractility (active motion) and elastic properties (active and passive motion). Magn Reson Med, 2014. © 2014 Wiley Periodicals, Inc. Magn Reson Med 73:1852–1863, 2015. © 2014 Wiley Periodicals, Inc.
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ankle morphology amplifies calcaneus movement relative to triceps surae muscle shortening
Journal of Applied Physiology, 2013Co-Authors: Robert Csapo, Ryuta Kinugasa, John A Hodgson, V R Edgerton, S K SinhaAbstract:The present study investigated the mechanical role of the dorsoventral curvature of the Achilles tendon in the conversion of the shortening of the plantarflexor muscles into ankle Joint Rotation. D...
Ryuta Kinugasa - One of the best experts on this subject based on the ideXlab platform.
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age related differences in strain rate tensor of the medial gastrocnemius muscle during passive plantarflexion and active isometric contraction using velocity encoded mr imaging
Magnetic Resonance in Medicine, 2015Co-Authors: Usha Sinha, Vadim Malis, Robert Csapo, Ali Moghadasi, Ryuta Kinugasa, S K SinhaAbstract:Purpose The strain rate (SR) tensor measures the principal directions and magnitude of the instantaneous deformation; this study aims to track age related changes in the 2D SR tensor in the medial gastrocnemius during passive Joint Rotation and active isometric contraction.
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age related differences in strain rate tensor of the medial gastrocnemius muscle during passive plantarflexion and active isometric contraction using velocity encoded mr imaging potential index of lateral force transmission
Magnetic Resonance in Medicine, 2015Co-Authors: Usha Sinha, Vadim Malis, Robert Csapo, Ali Moghadasi, Ryuta Kinugasa, Shantanu SinhaAbstract:Purpose The strain rate (SR) tensor measures the principal directions and magnitude of the instantaneous deformation; this study aims to track age-related changes in the 2D SR tensor in the medial gastrocnemius during passive Joint Rotation and active isometric contraction. Methods SR tensors were derived from velocity encoded magnetic resonance phase-contrast images in nine young (28 years) and eight senior (78 years) women. Strain rates along and in the cross-section of the fiber were calculated from the SR tensor and used to derive the out-plane SR. Age-related and regional differences in the SR eigenvalues, orientation, and the angle between the SR and muscle fiber (SR-fiber angle) were statistically analyzed. Results SR along the fiber was significantly different between the cohorts during isometric contraction with higher values in the young (P < 0.05). The SR-fiber angle was larger in the young for both motion types but this difference was not statistically significant. Significant regional differences in the SR indices was seen in passive Joint Rotation (P < 0.05) for both cohorts. Conclusion SR mapping reflects age-related and regional differences during active and passive motion respectively; this may arise from differences in contractility (active motion) and elastic properties (active and passive motion). Magn Reson Med, 2014. © 2014 Wiley Periodicals, Inc. Magn Reson Med 73:1852–1863, 2015. © 2014 Wiley Periodicals, Inc.
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ankle morphology amplifies calcaneus movement relative to triceps surae muscle shortening
Journal of Applied Physiology, 2013Co-Authors: Robert Csapo, Ryuta Kinugasa, John A Hodgson, V R Edgerton, S K SinhaAbstract:The present study investigated the mechanical role of the dorsoventral curvature of the Achilles tendon in the conversion of the shortening of the plantarflexor muscles into ankle Joint Rotation. D...
