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Knee abduction

Shanyuanye Guan, Hans A Gray, Anthony G Schache, Julian Feller, Richard de Steiger, Marcus G Pandy
No data are available to describe six-degree-of-freedom (6-DOF) knee-joint kinematics for one complete cycle of overground walking subsequent to total knee arthroplasty (TKA). The aims of this study were firstly, to measure 6-DOF knee-joint kinematics and condylar motion for overground walking following TKA; and secondly, to determine whether such data differed between overground and treadmill gait when participants walked at the same speed during both tasks. A unique mobile biplane X-ray imaging system enabled accurate measurement of 6-DOF TKA knee kinematics during overground walking by simultaneously tracking and imaging the joint...
October 22, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
Teresa E Flaxman, Tine Alkjær, Erik B Simonsen, Michael R Krogsgaard, Daniel L Benoit
INTRODUCTION: Knee muscles are commonly labelled as flexors or extensors and aptly stabilize the knee against sagittal plane loads. However, how these muscles stabilize the knee against adduction-abduction and rotational loads remains unclear. Our study sought to: (1) classify muscle roles as they relate to joint stability by quantifying the relationship between individual muscle activation patterns and internal net joint moments in all three loading planes, and (2) determine if these roles change with increasing force levels...
October 14, 2016: Medicine and Science in Sports and Exercise
Douglas W Powell, Samantha Andrews, Cris Stickley, D S Blaise Williams
: High- (HA) and low-arched athletes (LA) experience distinct injury patterns. These injuries are the result of the interaction of structure and biomechanics. A suggested mechanism of patellofemoral pain pertains to frontal plane knee moments which may be exaggerated in LA athletes. We hypothesize that LA athletes will exhibit greater peak knee abduction moments than high-arched athletes. METHODS: Twenty healthy female recreational athletes (10HA and 10LA) performed five over-ground barefoot walking and five barefoot running trials at a self-selected velocity while three-dimensional kinematics and ground reaction forces were recorded...
October 13, 2016: Human Movement Science
Rebecca N Howie, Timothy L Foutz, Curtis C Cathcart, Jeff S Burmeister, Steve C Budsberg
OBJECTIVE: To investigate the relationship between tibiofemoral kinematics before and after total knee replacement (TKR) in vitro. ANIMALS: Eight canine hemipelves. METHODS: A modified Oxford Knee Rig was used to place cadaveric limbs through a range of passive motion allowing the kinematics of the stifle to be evaluated. Four measurements were performed: a control stage, followed by a cranial cruciate transection stage, then following TKR with the musculature intact stage, and finally TKR with removal of limb musculature stage...
October 14, 2016: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
Ashley S Hammond, Victoria P Johnson, James P Higham
OBJECTIVES: We aimed to test for differences in hip joint range of motion (ROM) between captive and free-ranging rhesus macaques (Macaca mulatta), particularly for hip joint abduction, which previous studies of captive macaques have found to be lower than predicted. MATERIALS AND METHODS: Hip ROM was assessed following standard joint measurement methodology in anesthetized adult free-ranging rhesus macaques (n = 39) from Cayo Santiago, and compared with published ROM data from captive rhesus macaques (n = 16) (Hammond, , American Journal of Physical Anthropology)...
October 12, 2016: American Journal of Physical Anthropology
Ran Schwarzkopf, Erik Schnaser, Taiki Nozaki, Yasuhito Kaneko, Michael J Gillman
INTRODUCTION: Patient-specific implants and instruments (PSI) have been used in both knee and shoulder replacements due to the perceived benefits of improved surgical accuracy and efficiency. The proposed benefits of using a PSI in total hip arthroplasty (THA) are numerous and include reduction of operative time and improved mechanical and anatomical alignment leading to increased implant longevity, increased stability, and clinical outcomes. We describe a novel patient-specific instrumentation and a surgical method that may improve directed resection of acetabular bone and accurate cup placement during THA...
October 6, 2016: Surgical Technology International
Suzi Edwards, Hiram C Brooke, Jill L Cook
OBJECTIVES: This study aimed to explore the differences in the magnitude of movement variability and strategies utilized during an unanticipated cut task between players with and without a history of groin pain. DESIGN: Cross-sectional design. SETTING: Biomechanics laboratory. PARTICIANTS: Male Australian football players with (HISTORY; n = 7) or without (CONTROL; n = 10) a history of groin pain. OUTCOME MEASURES: Three-dimensional ground reaction forces (GRF) and kinematics were recorded during 10 successful trials of an unanticipated cut task, and isokinetic hip adduction and abduction strength...
July 22, 2016: Physical Therapy in Sport
Maryne Cozette, Stéphane Delanaud, Pierre-Marie Lepretre, Thierry Weissland
OBJECTIVE: Shoulder internal (IR) and external rotator (ER) muscles play an important role in the stability of glenohumeral joint. The ratio between the peak torque of ER and IR in concentric (ER/IRPT) and mixed (ER-ECC/IR-CONPT) are usually measured to evaluate the effects of muscle weakness, sport activities, injury and treatment (Greenfield et al., 1990; Scoville et al., 1997). However, ER/IRPT and ER-ECC/IR-CONPT failed to provide some indication on the evolution of the ER/IR torque ratio (ER/IRTorque) and mixed torque ratio (ER-EC/IR-COTorque) during the range of motion (ROM)...
September 2016: Annals of Physical and Rehabilitation Medicine
Marco Schieppati, Jean Louis Honeine, Manh-Cuong Do, Oscar Crisafulli
OBJECTIVE: The critical action for gait initiation involves lifting of the swing leg while shifting the centre of mass (CoM) of the body over the stance leg. This action is made possible by the initial displacement of the centre of pressure (CoP) in the direction of the swing leg. We hypothesised that the CoP displacement requires a coordinated action of the swing-leg abductor muscles and of the dorsiflexor muscles of the stance leg. MATERIAL/PATIENTS AND METHODS: Nine subjects initiated gait starting from three different initial stance widths (small, medium, wide)...
September 2016: Annals of Physical and Rehabilitation Medicine
Tina Ganderup, Carsten Jensen, Anders Holsgaard-Larsen, Jonas B Thorlund
PURPOSE: To investigate lower extremity muscle strength and functional performance before and after arthroscopic partial meniscectomy in middle-aged patients with degenerative meniscal tears. We hypothesized that patients would experience deficiencies in the affected leg at 3 months post-surgery, and that this deficiency would be normalized at 12 months following surgery. METHODS: Twenty-three patients (46 ± 6.5 years) meniscectomized in 2012 and 2013 were examined for knee extension, knee flexion, and hip abduction maximal isometric muscle strength (iMVC), rate of force development (RFD200), and knee function (single-leg hop for distance and single-leg knee bends in 30 s...
September 20, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Mari Leppänen, Kati Pasanen, Urho M Kujala, Tommi Vasankari, Pekka Kannus, Sami Äyrämö, Tron Krosshaug, Roald Bahr, Janne Avela, Jarmo Perttunen, Jari Parkkari
BACKGROUND: Few prospective studies have investigated the biomechanical risk factors of anterior cruciate ligament (ACL) injury. PURPOSE: To investigate the relationship between biomechanical characteristics of vertical drop jump (VDJ) performance and the risk of ACL injury in young female basketball and floorball players. STUDY DESIGN: Cohort study; Level of evidence, 3. METHODS: At baseline, a total of 171 female basketball and floorball players (age range, 12-21 years) participated in a VDJ test using 3-dimensional motion analysis...
September 16, 2016: American Journal of Sports Medicine
Giulia Mantovani, Mario Lamontagne
The choice of marker set is a source of variability in motion analysis. Studies exist that assess the performance of marker sets when direct kinematics is used, but these results cannot be extrapolated to the inverse kinematic framework. Therefore, the purpose of this study was to examine the sensitivity of kinematic outcomes to inter-marker set variability in an inverse kinematic framework. The compared marker sets were Plug-in-Gait, University of Ottawa Motion Analysis Model and a 3-marker-cluster marker set...
September 16, 2016: Journal of Biomechanical Engineering
Anna Ericsson, Tomas Bremell, Åsa Cider, Kaisa Mannerkorpi
BACKGROUND: There is very limited knowledge about the effects of exercise on men with Chronic Widespread Pain (CWP), especially regarding fatigue. We wanted to investigate the effects of resistance exercise compared with pool exercise on multidimensional fatigue, psychological distress and physical capacity in men with CWP. METHODS: Thirty-four men with CWP, with a mean age of 49 (SD 8, range 26-59) years, were randomised to 12 weeks of standardised pool exercise (PE) or resistance exercise (RE)...
2016: BMC Sports Science, Medicine and Rehabilitation
Jeremy M Burnham, Michael C Yonz, Kaley E Robertson, Rachelle McKinley, Benjamin R Wilson, Darren L Johnson, Mary Lloyd Ireland, Brian Noehren
OBJECTIVES: Evaluate the relationship of hip and trunk muscle function with the Single Leg Step-Down test (SLSD). STUDY DESIGN: Laboratory study. SETTING: Biomechanics Laboratory. PARTICIPANTS: 71 healthy participants with no history of anterior cruciate ligament (ACL) or lower extremity injury in the last 3 months completed this study (38 males, 33 females; mean 25.49 ± 0.62 years). MAIN OUTCOMES: Hip abduction (HABD), external rotation (HER), and extension (HEXT) peak isometric force were measured...
May 20, 2016: Physical Therapy in Sport
Bingbing Nie, Jeff R Crandall, Matthew B Panzer
ABSTRACTS Objective The lower extremity of the occupant represents the most frequently injured body region in motor vehicle crashes. Knee airbags (KABs) have been implemented as potential countermeasure to reduce lower extremity injuries. Despite the increasing prevalence of KABs in vehicles, the biomechanical interaction of the human lower extremity with the KAB has not been well characterized. This study uses computational models of the human body and knee airbags to explore how KAB design may influence the impact response of the occupant's lower extremities...
September 2, 2016: Traffic Injury Prevention
Sang-Kyoon Park, Dylan Kobsar, Reed Ferber
BACKGROUND: The relationship between muscle strength, gait biomechanics, and self-reported physical function and pain for patients with knee osteoarthritis is not well known. The objective of this study was to investigate these relationships in this population. METHODS: Twenty-four patients with knee osteoarthritis and 24 healthy controls were recruited. Self-reported pain and function, lower-limb maximum isometric force, and frontal plane gait kinematics during treadmill walking were collected on all patients...
October 2016: Clinical Biomechanics
Raphael Dumas, Rickard Branemark, Laurent Frossard
Quantitative assessments of prostheses performances rely more and more frequently on gait analysis focusing on prosthetic knee joint forces and moments computed by inverse dynamics. However, this method is prone to errors, as demonstrated in comparison with direct measurements of these forces and moments. The magnitude of errors reported in the literature seems to vary depending on prosthetic components. Therefore, the purposes of this study were (A) to quantify and compare the magnitude of errors in knee joint forces and moments obtained with inverse dynamics and direct measurements on ten participants with transfemoral amputation during walking and (B) to investigate if these errors can be characterised for different prosthetic knees...
August 18, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
Evgenia Manousaki, Tomasz Czuba, Gunnar Hägglund, Louise Mattsson, Hanneke Andriesse
Relapse after successful initial correction of idiopathic clubfoot with the Ponseti method is often related to poor compliance with the foot abduction orthosis (FAO). The aim of this study was to evaluate treatment with custom-made dynamic orthoses. Twenty children with idiopathic clubfoot (30feet) who had been treated with dynamic orthoses after the correction phase according to the Ponseti casting technique were evaluated. Relapse rates during orthotic treatment were registered. A Vicon gait analysis system was used to measure gait parameters at the age of seven years...
August 7, 2016: Gait & Posture
Ricky Watari, Dylan Kobsar, Angkoon Phinyomark, Sean Osis, Reed Ferber
BACKGROUND: Not all patients with patellofemoral pain exhibit successful outcomes following exercise therapy. Thus, the ability to identify patellofemoral pain subgroups related to treatment response is important for the development of optimal therapeutic strategies to improve rehabilitation outcomes. The purpose of this study was to use baseline running gait kinematic and clinical outcome variables to classify patellofemoral pain patients on treatment response retrospectively. METHODS: Forty-one individuals with patellofemoral pain that underwent a 6-week exercise intervention program were sub-grouped as treatment Responders (n=28) and Non-responders (n=13) based on self-reported measures of pain and function...
October 2016: Clinical Biomechanics
Soul Lee, Lin Wang, Jing Xian Li
BACKGROUND: Carrying a load asymmetrically and walking in high-heeled shoes are common in women. Knowledge of the effects of the two combined conditions on lower-limb kinetics is lacking. We sought to examine the effects of walking in high-heeled shoes and carrying an asymmetrical load on the joint kinetics of the lower extremity in young women. METHODS: Fifteen participants were asked to walk in flat-heeled and 9-cm high-heeled shoes and to asymmetrically carry loads of 0% body weight (BW), 5% BW, and 10% BW...
July 2016: Journal of the American Podiatric Medical Association
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