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https://www.readbyqxmd.com/read/28088304/mechanical-biomarkers-of-medial-compartment-knee-osteoarthritis-diagnosis-and-severity-grading-discovery-phase
#1
Neila Mezghani, Youssef Ouakrim, Alexandre Fuentes, Amar Mitiche, Nicola Hagemeister, Pascal-André Vendittoli, Jacques A de Guise
OBJECTIVE: To investigate, as a discovery phase, if 3D knee kinematics assessment parameters can serve as mechanical biomarkers, more specifically as diagnostic biomarker and burden of disease biomarkers, as defined in the Burden of Disease, Investigative, Prognostic, Efficacy of Intervention and Diagnostic classification scheme for osteoarthritis (OA) (Altman et al., 1986). These biomarkers consist of a set of biomechanical parameters discerned from 3D knee kinematic patterns, namely, flexion/extension, abduction/adduction, and tibial internal/external rotation measurements, during gait recording...
December 29, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/28062120/robotic-simulation-of-identical-athletic-task-kinematics-on-cadaveric-limbs-exhibits-a-lack-of-differences-in-knee-mechanics-between-contralateral-pairs
#2
Nathaniel A Bates, April L McPhearson, Rebecca J Nesbitt, Jason T Shearn, Gregory D Myer, Timothy E Hewett
Limb asymmetry is a known factor for increased ACL injury risk. These asymmetries are normally observed during in vivo testing. Prior studies have developed in vitro testing methodologies driven by in vivo kinematics to investigate knee mechanics relative to ACL injury. The objective of this study was to determine if mechanical side-to-side asymmetries persist in contralateral pairs during in vitro simulation testing. In vivo kinematics were recorded for male and female drop vertical jump and sidestep cutting tasks...
December 29, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/28059055/gluteal-muscle-contracture-diagnosis-and-management-options
#3
Saroj Rai, Chunqing Meng, Xiaohong Wang, Nabin Chaudhary, Shengyang Jin, Shuhua Yang, Hong Wang
Gluteal muscle contracture (GMC), a debilitating disease, exists all over the globe but it is much more prevalent in China. Patients typically present with abduction and external rotation of the hip and are unable to bring both the knees together while squatting. Multiple etiologies have been postulated, the commonest being repeated intramuscular injection into the buttocks. The disease is diagnosed primarily by clinical features but radiological features are necessary for the exclusion of other pathological conditions...
2017: SICOT-J
https://www.readbyqxmd.com/read/28045690/clinical-case-of-the-month-a-49-year-old-man-who-presents-with-left-sided-weakness-an-update-on-ischemic-stroke
#4
Najy Masri, Rikki Weems, Falon Brown, Ben Andres, Fred Lopez
A 49 year-old man with a past medical history significant for essential hypertension, hyperlipidemia, and coronary artery disease status post percutaneous coronary intervention and stent placement in the right coronary artery in 2010 presented for evaluation of left hemiplegia. He was feeling well until three hours prior to presentation, at which time he fell while walking from his bedroom into the kitchen. After falling, he noticed that his left upper and lower extremities felt weak. He denied any symptoms preceding the fall or any loss of consciousness...
November 2016: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28033056/effects-of-lateral-and-medial-wedged-insoles-on-knee-and-ankle-internal-joint-moments-during-walking-in-healthy-men
#5
Claudiane A Fukuchi, Ryan T Lewinson, Jay T Worobets, Darren J Stefanyshyn
BACKGROUND: Wedged insoles have been used to treat knee pathologies and to prevent injuries. Although they have received much attention for the study of knee injury, the effects of wedges on ankle joint biomechanics are not well understood. This study sought to evaluate the immediate effects of lateral and medial wedges on knee and ankle internal joint loading and center of pressure (CoP) in men during walking. METHODS: Twenty-one healthy men walked at 1.4 m/sec in five footwear conditions: neutral, 6° (LW6) and 9° (LW9) lateral wedges, and 6° (MW6) and 9° (MW9) medial wedges...
November 2016: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/28032707/surgical-technique-for-subtrochanteric-fracture-of-femur
#6
Peng-Cheng Wang, Dong Ren, Chao-Hui Song, Bing Zhou
A 56-year-old woman had fell over herself 4 h prior to her presentation to our hospital. The diagnosis was a subtrochanteric fracture of the right femur (AO-32-A3). The patient was placed in a supine position was set up on a fracture traction table after general anesthesia. The right leg was placed in abduction while the left leg was positioned so that there was flexion of the knee and hip joint. The C-arm was placed on the left side. The surgical field was sterilized and draped. Deformity and external rotation are always present for this type of fracture, so the first step was to place a joystick in the proximal fragment to correct the external rotation...
November 2016: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28027463/quantifying-knee-mechanics-during-balance-training-exercises
#7
Lauren C Benson, Thomas G Almonroeder, Kristian M O'Connor
Patellofemoral pain (PFP) is common among runners and those recovering from anterior cruciate ligament reconstruction. Training programs designed to prevent or treat injuries often include balance training, although balance interventions have been reported to coincide with more knee injuries. Knowledge of the effect of balance exercises on knee mechanics may be useful when designing training programs. High knee abduction moment has been implicated in the development of PFP, and imbalance between vastus lateralis (VL) and vastus medialis oblique (VMO) may contribute to patellofemoral stress...
December 24, 2016: Human Movement Science
https://www.readbyqxmd.com/read/27999724/the-reliability-of-faber-test-hip-range-of-motion-measurements
#8
Jennifer J Bagwell, Lauren Bauer, Marissa Gradoz, Terry L Grindstaff
BACKGROUND: The Flexion ABduction External Rotation (FABER) test is typically used as a provocation special test, but has also been used as a measurement of combined hip range of motion (ROM). It is thought that limited ROM with this measurement may be indicative of hip pathology. To date, normative data, reliability, and minimal detectable change (MDC) of such measurements have not been established. PURPOSE: To determine normative FABER height, assess inter- and intra-rater reliability and MDC for FABER, and compare traditional FABER measurements to methods which account for differences in thigh length...
December 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27999721/improvements-in-knee-extension-strength-are-associated-with-improvements-in-self-reported-hip-function-following-arthroscopy-for-femoroacetabular-impingement-syndrome
#9
Chelseana C Davis, Thomas J Ellis, Ajit K Amesur, Timothy E Hewett, Stephanie Di Stasi
BACKGROUND: Recovery of strength is critical for return to sport, and is a known predictor of functional outcomes in post-surgical orthopedic populations. Muscle weakness is a known impairment in patients with femoroacetabular impingement syndrome (FAIS) but whether improvements in muscle strength after arthroscopy are associated with improved hip function is unknown. HYPOTHESIS/PURPOSE: To examine the relationships between changes in hip and thigh muscle strength and self-reported function in athletes undergoing arthroscopy for FAIS...
December 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27982715/the-effect-of-footwear-adapted-with-a-multi-curved-rocker-sole-in-conjunction-with-knee-ankle-foot-orthoses-on-walking-in-poliomyelitis-subjects-a-pilot-study
#10
Ali Mojaver, Mokhtar Arazpour, Gholamreza Aminian, Monireh Ahmadi Bani, Mahmood Bahramizadeh, Guive Sharifi, Arash Sherafatvaziri
BACKGROUND: Knee-ankle-foot orthoses (KAFOs) are used by people with poliomyelitis to ambulate. Whist advances in orthotic knee joint designs for use in KAFOs such the provision of stance control capability have proven efficacy, little attention has been paid to shoe adaptations which may also improve gait. AIM: The aim of this study was to evaluate the alteration to the kinematics and temporal-spatial parameters of gait caused by the use of heel-to-toe rocker-soled footwear when ambulating with KAFOs...
December 16, 2016: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/27937807/age-and-sex-influences-on-running-mechanics-and-coordination-variability
#11
Katherine A Boyer, Julia Freedman Silvernail, Joseph Hamill
The purpose of this study was to examine the impact of age on running mechanics separately for male and female runners and to quantify sex differences in running mechanics and coordination variability for older runners. Kinematics and kinetics were captured for 20 younger (10 male) and 20 older (10 male) adults running overground at 3.5 m · s(-1). A modified vector coding technique was used to calculate segment coordination variability. Lower extremity joint angles, moments and segment coordination variability were compared between age and sex groups...
December 12, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27918704/comparison-of-3d-joint-angles-measured-with-the-kinect-2-0-skeletal-tracker-versus-a-marker-based-motion-capture-system
#12
Trent M Guess, Swithin Razu, Amirhossein Jahandar, Marjorie Skubic, Zhiyu Huo
The Microsoft Kinect is becoming a widely used tool for inexpensive, portable measurement of human motion with the potential to support clinical assessments of performance and function. In this study, the relative osteokinematic Cardan joint angles of the hip and knee were calculated using the Kinect 2.0 skeletal tracker. The pelvis segments of the default skeletal model were reoriented and three-dimensional joint angles were compared to a marker-based system during a drop vertical jump and a hip abduction motion...
December 5, 2016: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/27913901/3d-active-passive-response-of-human-knee-joint-in-gait-is-markedly-altered-when-simulated-as-a-planar-2d-joint
#13
H Marouane, A Shirazi-Adl, M Adouni
Musculoskeletal models of the lower extremity make a number of important assumptions when attempting to estimate muscle forces and tibiofemoral compartmental loads in activities such as gait. The knee is commonly idealized as a planar 2D joint in the sagittal plane with no consideration of motions and equilibrium in remaining planes. With muscle forces predicted, the static equilibrium in the frontal plane is then used to estimate compartmental loads neglecting also joint passive resistance and assuming condylar contact centers...
December 2, 2016: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/27893477/an-evaluation-of-agonist-antagonist-strength-ratios-and-posture-among-powerlifters
#14
Paul T Cutrufello, Stephen J Gadomski, Nicholas A Ratamess
Powerlifters routinely focus on three exercises: bench press, squat, and deadlift. This focus may predispose them to the development of muscle imbalances in either the upper or lower extremity which might also influence posture. Therefore, the purpose of the present study was to examine the agonist:antagonist strength ratios and their relationship to postural measures among powerlifters. An expost facto study design compared fifteen male powerlifters (35.3±13.7 years old) and fifteen age-matched controls (34...
November 16, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27882825/validity-and-reliability-of-a-low-cost-digital-dynamometer-for-measuring-isometric-strength-of-lower-limb
#15
Natalia Romero-Franco, Pedro Jiménez-Reyes, Juan A Montaño-Munuera
Lower limb isometric strength is a key parameter to monitor the training process or recognise muscle weakness and injury risk. However, valid and reliable methods to evaluate it often require high-cost tools. The aim of this study was to analyse the concurrent validity and reliability of a low-cost digital dynamometer for measuring isometric strength in lower limb. Eleven physically active and healthy participants performed maximal isometric strength for: flexion and extension of ankle, flexion and extension of knee, flexion, extension, adduction, abduction, internal and external rotation of hip...
November 24, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27874298/volitional-spine-stabilization-during-a-drop-vertical-jump-from-different-landing-heights-implications-for-anterior-cruciate-ligament-injury
#16
Ram Haddas, Troy Hooper, C Roger James, Phillip S Sizer
CONTEXT: Volitional preemptive abdominal contraction (VPAC) during dynamic activities may alter trunk motion, but the role of the core musculature in positioning the trunk during landing tasks is unclear. OBJECTIVE: To determine whether volitional core-muscle activation incorporated during a drop vertical jump alters lower extremity kinematics and kinetics, as well as trunk and lower extremity muscle activity at different landing heights. DESIGN: Controlled laboratory study...
December 2016: Journal of Athletic Training
https://www.readbyqxmd.com/read/27872123/effect-of-external-ankle-support-on-ankle-and-knee-biomechanics-during-the-cutting-maneuver-in-basketball-players
#17
Nardia-Rose Klem, Catherine Y Wild, Sian A Williams, Leo Ng
BACKGROUND: Despite the high prevalence of lower extremity injuries in female basketball players as well as a high proportion of athletes who wear ankle braces, there is a paucity of research pertaining to the effects of ankle bracing on ankle and knee biomechanics during basketball-specific tasks. PURPOSE: To compare the effects of a lace-up brace (ASO), a hinged brace (Active T2), and no ankle bracing (control) on ankle and knee joint kinematics and joint reaction forces in female basketball athletes during a cutting maneuver...
November 21, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27821928/the-effect-of-gluteus-medius-strengthening-on-the-knee-joint-function-score-and-pain-in-meniscal-surgery-patients
#18
Eun-Kyung Kim
[Purpose] The purpose of this study was to analyze the effect of gluteus medius activity strengthening due to squat with isometric hip adduction and hip abduction in side-lying exercise on knee joint function index and pain in meniscal surgery patients. [Subjects and Methods] This study selected sample of 26 patients who had meniscal surgery more than 4 weeks ago. The patients were divided into squat with isometric hip adduction exercise group I (n=8), hip abduction in side-lying exercise group II (n=9), and combined exercise group III...
October 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/27816458/normalization-influences-knee-abduction-moment-results-could-it-influence-acl-injury-research-too
#19
Marc F Norcross, Samuel T Johnson, Christine D Pollard, Eun Wook Chang, Mark A Hoffman
OBJECTIVES: Normalization of joint moments to reduce anthropometric influences prior to making group comparisons is a widely-accepted practice. However, a seminal prospective study reported greater non-normalized knee abduction moment (KAM) in nine females who subsequently sustained an ACL injury. It is not clear if this finding may have been influenced by the fact that the ACL-injured females were on average 3.6cm taller and 2.4kg heavier than uninjured females. DESIGN: Cross-sectional...
October 21, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/27816368/a-validated-single-view-radiographic-alternative-to-computed-tomography-for-the-measurement-of-femoral-anteversion-a-method-comparison-study
#20
Adam R Boissonneault, Takafumi Hiranaka, James R Roberson, Thomas L Bradbury
BACKGROUND: Although preoperative templating in total hip arthroplasty is helpful to ensure appropriate component position, there is no single-view radiographic method to determine femoral anteversion (FA) preoperatively. The aim of the present study was to validate the use of radiographic measurement of FA using a modified Budin view. METHODS: This prospective study reports on 105 limbs from 65 patients. Computed tomography (CT) scans and radiographs were obtained to measure native FA...
September 28, 2016: Journal of Arthroplasty
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