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ankle biomechanics

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https://www.readbyqxmd.com/read/28046009/stiffness-effects-in-rocker-soled-shoes-biomechanical-implications
#1
Shih-Yun Lin, Pei-Fang Su, Chia-Hua Chung, Chi-Chun Hsia, Chih-Han Chang
Rocker-soled shoes provide a way to reduce the possible concentration of stress, as well as change movement patterns, during gait. This study attempts to examine how plantar force and spatio-temporal variables are affected by two rocker designs, one with softer and one with denser sole materials, by comparing them with the barefoot condition and with flat-soled shoes. Eleven subjects' gait parameters during walking and jogging were recorded. Our results showed that compared with barefoot walking, plantar forces were higher for flat shoes while lower for both types of rocker shoes, the softer-material rocker being the lowest...
2017: PloS One
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
#2
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/28006109/joint-loading-in-the-sagittal-plane-during-gait-is-associated-with-hip-joint-abnormalities-in-patients-with-femoroacetabular-impingement
#3
Michael A Samaan, Benedikt J Schwaiger, Matthew C Gallo, Kiyoshi Sada, Thomas M Link, Alan L Zhang, Sharmila Majumdar, Richard B Souza
BACKGROUND: Femoroacetabular impingement (FAI) is a morphological abnormality of the hip joint that results in functional impairments during various activities of daily living (ADL) such as walking. Purpose/Hypothesis: The purpose of this study was to determine if lower extremity joint loading differed between patients with FAI and controls and to determine whether these altered biomechanical parameters were associated with intra-articular abnormalities. It was hypothesized that patients with FAI would exhibit altered lower extremity joint loading during walking when compared with healthy controls and that these altered joint loading patterns would be associated with intra-articular abnormalities...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27993094/talonavicular-ligament-prevalence-of-injury-in-ankle-sprains-histological-analysis-and-hypothesis-of-its-biomechanical-function
#4
Miriam De Dea, Constantinos Loizou, Georgina M Allen, David J Wilson, Nick Athanasou, Yoshinobu Uchihara, Paul Cooke, Thomas Cosker
OBJECTIVES: To assess the prevalence of injury of the talonavicular ligament (TNL) in ankle sprains, its anatomy and the stability of the talonavicular joint (TNJ) before and after dividing the TNL in a cadaver. METHODS: During a prospective study of 100 patients to assess the outcome of ankle injuries we noted high incidence of TNL injuries: we will discuss here the TNL findings. Each patient had undergone ultrasound (US) and cone beam computed tomography examination of the ankle...
December 20, 2016: British Journal of Radiology
https://www.readbyqxmd.com/read/27992250/impact-of-a-long-run-on-injury-related-biomechanics-with-relation-to-weekly-mileage-in-trained-male-runners
#5
Max R Paquette, Daniel A Melcher
The purposes of this study were to compare selected biomechanical variables before and after a long run, and to assess the relationship between weekly running volume and changes in lower limb biomechanics after the run. Twelve trained habitual rearfoot strike male runners ran overground before and after a treadmill long run while kinematic and kinetic data were recorded. Repeated measures analysis of variance and Cohen's d effect sizes were used to compare kinematic and kinetic variables before and after the run...
December 19, 2016: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/27992246/toe-in-landing-increases-the-ankle-inversion-angle-and-moment-during-single-leg-landing-implications-in-the-prevention-of-lateral-ankle-sprains
#6
Yuta Koshino, Tomoya Ishida, Masanori Yamanaka, Mina Samukawa, Takumi Kobayashi, Harukazu Tohyama
CONTEXT: Identifying the foot positions that are vulnerable to lateral ankle sprains is important for injury prevention. The effects of foot position in the transverse plane on ankle biomechanics during landing are unknown. OBJECTIVE: To examine the effects of toe-in or toe-out positioning on ankle inversion motion and moment during single-leg landing. DESIGN: Repeated measures. SETTING: Motion analysis laboratory. PARTICIPANTS: Eighteen healthy participants (nine men and nine women)...
December 19, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27990241/android-platform-for-realtime-gait-tracking-using-inertial-measurement-units
#7
Pablo Aqueveque, Sergio Sobarzo, Francisco Saavedra, Claudio Maldonado, Britam Gómez
One of the most important movements performed by the humans is gait. Biomechanical Gait analysis is usually by optical capture systems. However, such systems are expensive and sensitive to light and obstacles. In order to reduce those costs a system based on Inertial Measurements Units (IMU) is proposed. IMU are a good option to make movement analisys indoor with a low post-processing data, allowing to connect those systems to an Android platform. The design is based on two elements: a) The IMU sensors and the b) Android device...
June 13, 2016: European Journal of Translational Myology
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
#8
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/27942700/lower-extremity-biomechanical-demands-during-saut-de-chat-leaps
#9
Danielle N Jarvis, Kornelia Kulig
: In dance, high demands are placed on the lower extremity joints during jumping tasks. The purpose of this study was to compare biomechanical demands placed on the lower extremity joints during the takeoff and landing phases of saut de chat leaps. METHODS: Thirty healthy, experienced dancers with 20.8±4.9 yrs of dance training performed 5 saut de chat leaps. A three-dimensional motion analysis system and force plates were used to collect kinematic and kinetic data...
December 2016: Medical Problems of Performing Artists
https://www.readbyqxmd.com/read/27940898/the-effect-of-damping-in-prosthetic-ankle-and-knee-joints-on-the-biomechanical-outcomes-a-literature-review
#10
REVIEW
Zahra Safaeepour, Arezoo Eshraghi, Mark Geil
BACKGROUND: Given the growing number of variable-damping prosthetic knee and ankle components and broad number of potential biomechanical outcomes, a systematic review is needed to assess advantages of damped knee and ankle units over non-damped prostheses. OBJECTIVES: This study provides an overview of the biomechanical outcomes associated with the use of prosthetic knees and ankles with damping mechanisms in individuals with lower limb amputation. STUDY DESIGN: Literature review...
December 9, 2016: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/27935426/joint-stiffness-and-running-economy-during-imposed-forefoot-strike-before-and-after-a-long-run-in-rearfoot-strike-runners
#11
Daniel A Melcher, Max R Paquette, Brian K Schilling, Richard J Bloomer
Research has focused on the effects of acute strike pattern modifications on lower extremity joint stiffness and running economy (RE). Strike pattern modifications on running biomechanics have mostly been studied while runners complete short running bouts. This study examined the effects of an imposed forefoot strike (FFS) on RE and ankle and knee joint stiffness before and after a long run in habitual rearfoot strike (RFS) runners. Joint kinetics and RE were collected before and after a long run. Sagittal joint kinetics were computed from kinematic and ground reaction force data that were collected during over-ground running trials in 13 male runners...
December 9, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27923175/errors-in-the-ankle-plantarflexor-force-production-are-related-to-the-gait-deficits-of-individuals-with-multiple-sclerosis
#12
Brenda L Davies, Rashelle M Hoffman, Kathleen Healey, Rana Zabad, Max J Kurz
BACKGROUND: Individuals with multiple sclerosis (MS) often have limited mobility that is thought to be due to the neuromuscular impairments of the ankle. Greater isometric motor control of the ankle has been associated with better standing postural balance but its relationship to mobility is less understood. The objectives of this investigation were to quantify the motor control of the ankle plantarflexors of individuals with MS during a dynamic isometric motor task, and explore the relationship between the ankle force control and gait alterations...
December 3, 2016: Human Movement Science
https://www.readbyqxmd.com/read/27920332/comparison-of-ankle-fusion-rates-with-and-without-anterior-plate-augmentation
#13
Phillip M Mitchell, Diana G Douleh, A Brian Thomson
BACKGROUND: The optimal fixation construct for tibiotalar arthrodesis continues to be debated. While biomechanical data and clinical series support anterior plate augmentation, comparative studies assessing its use are sparse. The purpose of this study was to compare the rates of successful tibiotalar arthrodesis with and without anterior plate augmentation of a compression screw construct. METHODS: We studied 64 patients (65 ankles) undergoing tibiotalar arthrodesis done by a single surgeon over a 10-year period (2006-2016) with anterior plate augmentation beginning in 2010...
December 5, 2016: Foot & Ankle International
https://www.readbyqxmd.com/read/27919511/metaphyseal-locking-plate-as-an-external-fixator-for-open-tibial-fracture-clinical-outcomes-and-biomechanical-assessment
#14
Ching-Hou Ma, Chin-Hsien Wu, Jiun-Ru Jiang, Yuan-Kun Tu, Ting-Sheng Lin
OBJECTIVE: This study aimed to evaluate the outcome of using a metaphyseal locking plate as a definitive external fixator for treating open tibial fractures based on biomechanical experiments and analysis of clinical results. METHODS: A metaphyseal locking plate was used as an external fixator in 54 open tibial fractures in 52 patients. The mean follow-up was 38 months (range, 20-52 months). Moreover, static axial compression and torsional tests were performed to evaluate the strength of the fixation techniques...
November 29, 2016: Injury
https://www.readbyqxmd.com/read/27904801/midfoot-and-forefoot-involvement-in-lateral-ankle-sprains-and-chronic-ankle-instability-part-1-anatomy-and-biomechanics
#15
John J Fraser, Mark A Feger, Jay Hertel
: The modern human foot is the culmination of more than five million years of evolution. The ankle-foot complex absorbs forces during loading, accommodates uneven surfaces, and acts as a lever for efficient propulsion. The ankle-foot complex has six independent functional segments that should be understood for proper assessment and treatment of foot and ankle injuries: the shank, rearfoot, midfoot, lateral forefoot, and the medial forefoot. The compliance of the individual segments of the foot is dependent on velocity, task, and active and passive coupling mechanisms within each of the foot segments...
December 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27904791/current-concepts-in-biomechanical-interventions-for-patellofemoral-pain
#16
Richard W Willy, Erik P Meira
: Patellofemoral pain (PFP) has historically been a complex and enigmatic issue. Many of the factors thought to relate to PFP remain after patients' symptoms have resolved making their clinical importance difficult to determine. The tissue homeostasis model proposed by Dye in 2005 can assist with understanding and implementing biomechanical interventions for PFP. Under this model, the goal of interventions for PFP should be to re-establish patellofemoral joint (PFJ) homeostasis through a temporary alteration of load to the offended tissue, followed by incrementally restoring the envelope of function to the baseline level or higher...
December 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27903626/a-unified-perspective-on-ankle-push-off-in-human-walking
#17
REVIEW
Karl E Zelik, Peter G Adamczyk
Muscle-tendon units about the ankle joint generate a burst of positive power during the step-to-step transition in human walking, termed ankle push-off, but there is no scientific consensus on its functional role. A central question embodied in the biomechanics literature is: does ankle push-off primarily contribute to leg swing, or to center of mass (COM) acceleration? This question has been debated in various forms for decades. However, it actually presents a false dichotomy, as these two possibilities are not mutually exclusive...
December 1, 2016: Journal of Experimental Biology
https://www.readbyqxmd.com/read/27897410/androgen-deprivation-causes-selective-deficits-in-the-biomechanical-leg-muscle-function-of-men-during-walking-a-prospective-case-control-study
#18
Ada S Cheung, Hans Gray, Anthony G Schache, Rudolf Hoermann, Daryl Lim Joon, Jeffrey D Zajac, Marcus G Pandy, Mathis Grossmann
BACKGROUND: Although muscle mass declines with testosterone deficiency in men, previous studies of muscle function have not demonstrated consistent deficits, likely due to relatively insensitive methodology. Our objective was to determine the effects of testosterone deprivation on the biomechanical function of individual lower-limb muscles. METHODS: We conducted a 12-month prospective, observational case-control study of 34 men newly commencing androgen deprivation treatment (ADT) for prostate cancer and 29 age-matched prostate cancer controls...
August 2, 2016: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/27895574/robot-assisted-rehabilitation-of-ankle-plantar-flexors-spasticity-a-3-month-study-with-proprioceptive-neuromuscular-facilitation
#19
Zhihao Zhou, Yao Sun, Ninghua Wang, Fan Gao, Kunlin Wei, Qining Wang
In this paper, we aim to investigate the effect of proprioceptive neuromuscular facilitation (PNF)-based rehabilitation for ankle plantar flexors spasticity by using a Robotic Ankle-foot Rehabilitation System (RARS). A modified robot-assisted system was proposed, and seven poststroke patients with hemiplegic spastic ankles participated in a 3-month robotic PNF training. Their impaired sides were used as the experimental group, while their unimpaired sides as the control group. A robotic intervention for the experimental group started from a 2-min passive stretching to warming-up or relaxing the soleus and gastrocnemius muscles and also ended with the same one...
2016: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/27882360/static-and-dynamic-predictors-of-foot-progression-angle-in-individuals-with-and-without-diabetes-mellitus-and-peripheral-neuropathy
#20
Ericka N Merriwether, Mary K Hastings, Michael J Mueller, Kathryn L Bohnert, Michael J Strube, Darrah R Snozek, David R Sinacore
INTRODUCTION: Foot progression angle (FPA) is a predictor of elevated regional plantar stresses and loads, which are indicators of dermal injury risk in individuals with diabetes mellitus and peripheral neuropathy (DMPN). FPA accounts for 15-45% of the variance in plantar stresses and loads in adults with DMPN. However, the biomechanical factors underlying an "out-toeing" gait pattern in this clinical population have not been examined. The primary purpose of this study was to identify static and dynamic predictors of foot progression angle magnitude in adults with and without DMPN...
2016: Annals of Gerontology and Geriatric Research
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