The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Kelley G Fitzgerald - One of the best experts on this subject based on the ideXlab platform.
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knee joint contact mechanics during downhill gait and its relationship with varus valgus motion and muscle strength in patients with knee osteoarthritis
Knee, 2016Co-Authors: Shawn Farrokhi, Carrie A Voycheck, Jonathan A Gustafson, Kelley G Fitzgerald, Scott TashmanAbstract:Abstract Objective The objective of this exploratory study was to evaluate tibiofemoral joint contact point excursions and velocities during downhill gait and assess the relationship between tibiofemoral joint contact mechanics with frontal-plane knee joint motion and lower extremity muscle weakness in patients with knee osteoarthritis (OA). Methods Dynamic stereo X-ray was used to quantify tibiofemoral joint contact mechanics and frontal-plane motion during the loading response phase of downhill gait in 11 patients with knee OA and 11 control volunteers. Quantitative testing of the quadriceps and the hip abductor muscles was also performed. Results Patients with knee OA demonstrated larger medial/lateral joint contact point excursions (p Conclusion Altered contact mechanics in patients with knee OA may be related to compromised frontal-plane joint stability but not with deficits in muscle strength.
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altered tibiofemoral joint contact mechanics and kinematics in patients with knee osteoarthritis and episodic complaints of joint instability
Clinical Biomechanics, 2014Co-Authors: Shawn Farrokhi, Carrie A Voycheck, Jonathan A Gustafson, Scott Tashman, Brian A Klatt, Kelley G FitzgeraldAbstract:Abstract Background To evaluate knee joint contact mechanics and kinematics during the loading response phase of downhill gait in knee osteoarthritis patients with self-reported instability. Methods Forty-three subjects, 11 with medial compartment knee osteoarthritis and self-reported instability (unstable), 7 with medial compartment knee osteoarthritis but no reports of instability (stable), and 25 without knee osteoarthritis or instability (control) underwent Dynamic Stereo X-ray analysis during a downhill gait task on a treadmill. Findings The medial compartment contact point excursions were longer in the unstable group compared to the stable (P = 0.046) and the control groups (P = 0.016). The peak medial compartment contact point velocity was also greater for the unstable group compared to the stable (P = 0.047) and control groups (P = 0.022). Additionally, the unstable group demonstrated a coupled movement pattern of knee extension and external rotation after heel contact which was different than the coupled motion of knee flexion and internal rotation demonstrated by stable and control groups. Interpretation Our findings suggest that knee joint contact mechanics and kinematics are altered during the loading response phase of downhill gait in knee osteoarthritis patients with self-reported instability. The observed longer medial compartment contact point excursions and higher velocities represent objective signs of mechanical instability that may place the arthritic knee joint at increased risk for disease progression. Further research is indicated to explore the clinical relevance of altered contact mechanics and kinematics during other common daily activities and to assess the efficacy of rehabilitation programs to improve altered joint biomechanics in knee osteoarthritis patients with self-reported instability.
Scott Tashman - One of the best experts on this subject based on the ideXlab platform.
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knee joint contact mechanics during downhill gait and its relationship with varus valgus motion and muscle strength in patients with knee osteoarthritis
Knee, 2016Co-Authors: Shawn Farrokhi, Carrie A Voycheck, Jonathan A Gustafson, Kelley G Fitzgerald, Scott TashmanAbstract:Abstract Objective The objective of this exploratory study was to evaluate tibiofemoral joint contact point excursions and velocities during downhill gait and assess the relationship between tibiofemoral joint contact mechanics with frontal-plane knee joint motion and lower extremity muscle weakness in patients with knee osteoarthritis (OA). Methods Dynamic stereo X-ray was used to quantify tibiofemoral joint contact mechanics and frontal-plane motion during the loading response phase of downhill gait in 11 patients with knee OA and 11 control volunteers. Quantitative testing of the quadriceps and the hip abductor muscles was also performed. Results Patients with knee OA demonstrated larger medial/lateral joint contact point excursions (p Conclusion Altered contact mechanics in patients with knee OA may be related to compromised frontal-plane joint stability but not with deficits in muscle strength.
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altered tibiofemoral joint contact mechanics and kinematics in patients with knee osteoarthritis and episodic complaints of joint instability
Clinical Biomechanics, 2014Co-Authors: Shawn Farrokhi, Carrie A Voycheck, Jonathan A Gustafson, Scott Tashman, Brian A Klatt, Kelley G FitzgeraldAbstract:Abstract Background To evaluate knee joint contact mechanics and kinematics during the loading response phase of downhill gait in knee osteoarthritis patients with self-reported instability. Methods Forty-three subjects, 11 with medial compartment knee osteoarthritis and self-reported instability (unstable), 7 with medial compartment knee osteoarthritis but no reports of instability (stable), and 25 without knee osteoarthritis or instability (control) underwent Dynamic Stereo X-ray analysis during a downhill gait task on a treadmill. Findings The medial compartment contact point excursions were longer in the unstable group compared to the stable (P = 0.046) and the control groups (P = 0.016). The peak medial compartment contact point velocity was also greater for the unstable group compared to the stable (P = 0.047) and control groups (P = 0.022). Additionally, the unstable group demonstrated a coupled movement pattern of knee extension and external rotation after heel contact which was different than the coupled motion of knee flexion and internal rotation demonstrated by stable and control groups. Interpretation Our findings suggest that knee joint contact mechanics and kinematics are altered during the loading response phase of downhill gait in knee osteoarthritis patients with self-reported instability. The observed longer medial compartment contact point excursions and higher velocities represent objective signs of mechanical instability that may place the arthritic knee joint at increased risk for disease progression. Further research is indicated to explore the clinical relevance of altered contact mechanics and kinematics during other common daily activities and to assess the efficacy of rehabilitation programs to improve altered joint biomechanics in knee osteoarthritis patients with self-reported instability.
Shawn Farrokhi - One of the best experts on this subject based on the ideXlab platform.
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knee joint contact mechanics during downhill gait and its relationship with varus valgus motion and muscle strength in patients with knee osteoarthritis
Knee, 2016Co-Authors: Shawn Farrokhi, Carrie A Voycheck, Jonathan A Gustafson, Kelley G Fitzgerald, Scott TashmanAbstract:Abstract Objective The objective of this exploratory study was to evaluate tibiofemoral joint contact point excursions and velocities during downhill gait and assess the relationship between tibiofemoral joint contact mechanics with frontal-plane knee joint motion and lower extremity muscle weakness in patients with knee osteoarthritis (OA). Methods Dynamic stereo X-ray was used to quantify tibiofemoral joint contact mechanics and frontal-plane motion during the loading response phase of downhill gait in 11 patients with knee OA and 11 control volunteers. Quantitative testing of the quadriceps and the hip abductor muscles was also performed. Results Patients with knee OA demonstrated larger medial/lateral joint contact point excursions (p Conclusion Altered contact mechanics in patients with knee OA may be related to compromised frontal-plane joint stability but not with deficits in muscle strength.
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altered tibiofemoral joint contact mechanics and kinematics in patients with knee osteoarthritis and episodic complaints of joint instability
Clinical Biomechanics, 2014Co-Authors: Shawn Farrokhi, Carrie A Voycheck, Jonathan A Gustafson, Scott Tashman, Brian A Klatt, Kelley G FitzgeraldAbstract:Abstract Background To evaluate knee joint contact mechanics and kinematics during the loading response phase of downhill gait in knee osteoarthritis patients with self-reported instability. Methods Forty-three subjects, 11 with medial compartment knee osteoarthritis and self-reported instability (unstable), 7 with medial compartment knee osteoarthritis but no reports of instability (stable), and 25 without knee osteoarthritis or instability (control) underwent Dynamic Stereo X-ray analysis during a downhill gait task on a treadmill. Findings The medial compartment contact point excursions were longer in the unstable group compared to the stable (P = 0.046) and the control groups (P = 0.016). The peak medial compartment contact point velocity was also greater for the unstable group compared to the stable (P = 0.047) and control groups (P = 0.022). Additionally, the unstable group demonstrated a coupled movement pattern of knee extension and external rotation after heel contact which was different than the coupled motion of knee flexion and internal rotation demonstrated by stable and control groups. Interpretation Our findings suggest that knee joint contact mechanics and kinematics are altered during the loading response phase of downhill gait in knee osteoarthritis patients with self-reported instability. The observed longer medial compartment contact point excursions and higher velocities represent objective signs of mechanical instability that may place the arthritic knee joint at increased risk for disease progression. Further research is indicated to explore the clinical relevance of altered contact mechanics and kinematics during other common daily activities and to assess the efficacy of rehabilitation programs to improve altered joint biomechanics in knee osteoarthritis patients with self-reported instability.
Carrie A Voycheck - One of the best experts on this subject based on the ideXlab platform.
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knee joint contact mechanics during downhill gait and its relationship with varus valgus motion and muscle strength in patients with knee osteoarthritis
Knee, 2016Co-Authors: Shawn Farrokhi, Carrie A Voycheck, Jonathan A Gustafson, Kelley G Fitzgerald, Scott TashmanAbstract:Abstract Objective The objective of this exploratory study was to evaluate tibiofemoral joint contact point excursions and velocities during downhill gait and assess the relationship between tibiofemoral joint contact mechanics with frontal-plane knee joint motion and lower extremity muscle weakness in patients with knee osteoarthritis (OA). Methods Dynamic stereo X-ray was used to quantify tibiofemoral joint contact mechanics and frontal-plane motion during the loading response phase of downhill gait in 11 patients with knee OA and 11 control volunteers. Quantitative testing of the quadriceps and the hip abductor muscles was also performed. Results Patients with knee OA demonstrated larger medial/lateral joint contact point excursions (p Conclusion Altered contact mechanics in patients with knee OA may be related to compromised frontal-plane joint stability but not with deficits in muscle strength.
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altered tibiofemoral joint contact mechanics and kinematics in patients with knee osteoarthritis and episodic complaints of joint instability
Clinical Biomechanics, 2014Co-Authors: Shawn Farrokhi, Carrie A Voycheck, Jonathan A Gustafson, Scott Tashman, Brian A Klatt, Kelley G FitzgeraldAbstract:Abstract Background To evaluate knee joint contact mechanics and kinematics during the loading response phase of downhill gait in knee osteoarthritis patients with self-reported instability. Methods Forty-three subjects, 11 with medial compartment knee osteoarthritis and self-reported instability (unstable), 7 with medial compartment knee osteoarthritis but no reports of instability (stable), and 25 without knee osteoarthritis or instability (control) underwent Dynamic Stereo X-ray analysis during a downhill gait task on a treadmill. Findings The medial compartment contact point excursions were longer in the unstable group compared to the stable (P = 0.046) and the control groups (P = 0.016). The peak medial compartment contact point velocity was also greater for the unstable group compared to the stable (P = 0.047) and control groups (P = 0.022). Additionally, the unstable group demonstrated a coupled movement pattern of knee extension and external rotation after heel contact which was different than the coupled motion of knee flexion and internal rotation demonstrated by stable and control groups. Interpretation Our findings suggest that knee joint contact mechanics and kinematics are altered during the loading response phase of downhill gait in knee osteoarthritis patients with self-reported instability. The observed longer medial compartment contact point excursions and higher velocities represent objective signs of mechanical instability that may place the arthritic knee joint at increased risk for disease progression. Further research is indicated to explore the clinical relevance of altered contact mechanics and kinematics during other common daily activities and to assess the efficacy of rehabilitation programs to improve altered joint biomechanics in knee osteoarthritis patients with self-reported instability.
Jonathan A Gustafson - One of the best experts on this subject based on the ideXlab platform.
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knee joint contact mechanics during downhill gait and its relationship with varus valgus motion and muscle strength in patients with knee osteoarthritis
Knee, 2016Co-Authors: Shawn Farrokhi, Carrie A Voycheck, Jonathan A Gustafson, Kelley G Fitzgerald, Scott TashmanAbstract:Abstract Objective The objective of this exploratory study was to evaluate tibiofemoral joint contact point excursions and velocities during downhill gait and assess the relationship between tibiofemoral joint contact mechanics with frontal-plane knee joint motion and lower extremity muscle weakness in patients with knee osteoarthritis (OA). Methods Dynamic stereo X-ray was used to quantify tibiofemoral joint contact mechanics and frontal-plane motion during the loading response phase of downhill gait in 11 patients with knee OA and 11 control volunteers. Quantitative testing of the quadriceps and the hip abductor muscles was also performed. Results Patients with knee OA demonstrated larger medial/lateral joint contact point excursions (p Conclusion Altered contact mechanics in patients with knee OA may be related to compromised frontal-plane joint stability but not with deficits in muscle strength.
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altered tibiofemoral joint contact mechanics and kinematics in patients with knee osteoarthritis and episodic complaints of joint instability
Clinical Biomechanics, 2014Co-Authors: Shawn Farrokhi, Carrie A Voycheck, Jonathan A Gustafson, Scott Tashman, Brian A Klatt, Kelley G FitzgeraldAbstract:Abstract Background To evaluate knee joint contact mechanics and kinematics during the loading response phase of downhill gait in knee osteoarthritis patients with self-reported instability. Methods Forty-three subjects, 11 with medial compartment knee osteoarthritis and self-reported instability (unstable), 7 with medial compartment knee osteoarthritis but no reports of instability (stable), and 25 without knee osteoarthritis or instability (control) underwent Dynamic Stereo X-ray analysis during a downhill gait task on a treadmill. Findings The medial compartment contact point excursions were longer in the unstable group compared to the stable (P = 0.046) and the control groups (P = 0.016). The peak medial compartment contact point velocity was also greater for the unstable group compared to the stable (P = 0.047) and control groups (P = 0.022). Additionally, the unstable group demonstrated a coupled movement pattern of knee extension and external rotation after heel contact which was different than the coupled motion of knee flexion and internal rotation demonstrated by stable and control groups. Interpretation Our findings suggest that knee joint contact mechanics and kinematics are altered during the loading response phase of downhill gait in knee osteoarthritis patients with self-reported instability. The observed longer medial compartment contact point excursions and higher velocities represent objective signs of mechanical instability that may place the arthritic knee joint at increased risk for disease progression. Further research is indicated to explore the clinical relevance of altered contact mechanics and kinematics during other common daily activities and to assess the efficacy of rehabilitation programs to improve altered joint biomechanics in knee osteoarthritis patients with self-reported instability.
