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Biomechanics gait

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https://www.readbyqxmd.com/read/28104260/robot-guided-ankle-sensorimotor-rehabilitation-of-patients-with-multiple-sclerosis
#1
Yunju Lee, Kai Chen, Yupeng Ren, Jongsang Son, Bruce A Cohen, James A Sliwa, Li-Qun Zhang
BACKGROUND: People with multiple sclerosis (MS) often develop symptoms including muscle weakness, spasticity, imbalance, and sensory loss in the lower limbs, especially at the ankle, which result in impaired balance and locomotion and increased risk of falls. Rehabilitation strategies that improve ankle function may improve mobility and safety of ambulation in patients with MS. This pilot study investigated effectiveness of a robot-guided ankle passive-active movement training in reducing motor and sensory impairments and improving balance and gait functions...
January 2017: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/28103196/sensor-based-gait-parameter-extraction-with-deep-convolutional-neural-networks
#2
Julius Hannink, Thomas Kautz, Cristian Pasluosta, Karl-Gunter Gassmann, Jochen Klucken, Bjoern Eskofier
Measurement of stride-related, biomechanical parameters is the common rationale for objective gait impairment scoring. State-of-the-art double integration approaches to extract these parameters from inertial sensor data are, however, limited in their clinical applicability due to the underlying assumptions. To overcome this, we present a method to translate the abstract information provided by wearable sensors to context-related expert features based on deep convolutional neural networks. Regarding mobile gait analysis, this enables integration-free and data-driven extraction of a set of eight spatio-temporal stride parameters...
December 8, 2016: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28101944/biomechanical-implications-of-walking-with-indigenous-footwear
#3
Catherine Willems, Gaetane Stassijns, Wim Cornelis, Kristiaan D'Août
OBJECTIVES: This study investigates biomechanical implications of walking with indigenous "Kolhapuri" footwear compared to barefoot walking among a population of South Indians. MATERIALS AND METHODS: Ten healthy adults from South India walked barefoot and indigenously shod at voluntary speed on an artificial substrate. The experiment was repeated outside, on a natural substrate. Data were collected from (1) a heel-mounted 3D-accelerometer recording peak impact at heel contact, (2) an ankle-mounted 3D-goniometer (plantar/dorsiflexion and inversion/eversion), and (3) sEMG electrodes at the m...
January 19, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28100420/osteoarthritis-year-in-review-2016-mechanics
#4
REVIEW
D J Saxby, D G Lloyd
Inappropriate biomechanics, namely wear-and-tear, has been long believed to be a main cause of osteoarthritis (OA). However, this view is now being re-evaluated, especially when examined alongside mechanobiology and new biomechanical studies. These are multiscale experimental and computational studies focussing on cell- and tissue-level mechanobiology through to organ- and whole-body-level biomechanics, which focuses on the biomechanical and biochemical environment of the joint tissues. This review examined papers from April 2015 to April 2016, with a focus on multiscale experimental and computational biomechanical studies of OA...
December 16, 2016: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28097064/phalangeal-joints-kinematics-during-ostrich-struthio-camelus-locomotion
#5
Rui Zhang, Qiaoli Ji, Gang Luo, Shuliang Xue, Songsong Ma, Jianqiao Li, Lei Ren
The ostrich is a highly cursorial bipedal land animal with a permanently elevated metatarsophalangeal joint supported by only two toes. Although locomotor kinematics in walking and running ostriches have been examined, these studies have been largely limited to above the metatarsophalangeal joint. In this study, kinematic data of all major toe joints were collected from gaits with double support (slow walking) to running during stance period in a semi-natural setup with two selected cooperative ostriches. Statistical analyses were conducted to investigate the effect of locomotor gait on toe joint kinematics...
2017: PeerJ
https://www.readbyqxmd.com/read/28095075/a-pilot-study-using-entropy-as-a-non-invasive-assessment-of-running
#6
Andrew M Murray, Joong Hyun Ryu, John Sproule, Anthony P Turner, Phil Graham-Smith, Marco Cardinale
PURPOSE: Running performance is influenced by the interaction of biomechanical and physiological factors. Miniaturised accelerometers worn by the athlete can be used to quantify mechanical aspects of running and be used as a non-invasive tool to assess training status and progression. The aim of this study was to define and validate a method to assess running regularity and allow the estimation of an individual's V̇O2 and/or blood lactate [La]b based on data collected with accelerometers and heart rate (HR)...
January 17, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28094763/measuring-the-effect-of-femoral-malrotation-on-knee-joint-biomechanics-for-total-knee-arthroplasty-using-computational-simulation
#7
K-T Kang, Y-G Koh, J Son, O-R Kwon, C Baek, S H Jung, K K Park
OBJECTIVES: Malrotation of the femoral component can result in post-operative complications in total knee arthroplasty (TKA), including patellar maltracking. Therefore, we used computational simulation to investigate the influence of femoral malrotation on contact stresses on the polyethylene (PE) insert and on the patellar button as well as on the forces on the collateral ligaments. MATERIALS AND METHODS: Validated finite element (FE) models, for internal and external malrotations from 0° to 10° with regard to the neutral position, were developed to evaluate the effect of malrotation on the femoral component in TKA...
November 2016: Bone & Joint Research
https://www.readbyqxmd.com/read/28088304/mechanical-biomarkers-of-medial-compartment-knee-osteoarthritis-diagnosis-and-severity-grading-discovery-phase
#8
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/28087063/spatial-dependent-mechanical-properties-of-the-heel-pad-by-shear-wave-elastography
#9
Che-Yu Lin, Pei-Yu Chen, Yio-Wha Shau, Hao-Chih Tai, Chung-Li Wang
The heel pad plays an important role in gait, and its biomechanical behavior and functionality are determined by its specialized architecture and mechanical properties. The purpose of this study was to apply supersonic shear wave elastography, an ultrasound-based noninvasive modality that can quantitatively estimate the shear stiffness of the tissue, to investigate the spatial-dependent mechanical properties of the heel pad. Measurements were conducted in 40 heel pads of 20 normal participants aged between 20 and 30 years by shear wave elastography...
January 6, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28075436/gait-kinematic-deviations-in-patients-with-developmental-dysplasia-of-the-hip-treated-with-total-hip-arthroplasty
#10
Yong Nie, Ning Ning, Fuxing Pei, Bin Shen, Zongke Zhou, Zongming Li
Comprehensive gait analysis of patients with Crowe type II and III developmental dysplasia of the hip (DDH) after successful total hip arthroplasty (THA) is lacking in the literature. This study evaluated gait function in joint kinematics after unilateral and bilateral THA in patients with DDH. In addition, the effect of high cup position on gait function was investigated. A total of 16 unilateral and 15 bilateral cementless THA patients due to DDH and 10 healthy participants comprised the study population...
January 11, 2017: Orthopedics
https://www.readbyqxmd.com/read/28066523/effects-of-the-genium-microprocessor-knee-system-on-knee-moment-symmetry-during-hill-walking
#11
M Jason Highsmith, Tyler D Klenow, Jason T Kahle, Matthew M Wernke, Stephanie L Carey, Rebecca M Miro, Derek J Lura
Use of the Genium microprocessor knee (MPK) system reportedly improves knee kinematics during walking and other functional tasks compared to other MPK systems. This improved kinematic pattern was observed when walking on different hill conditions and at different speeds. Given the improved kinematics associated with hill walking while using the Genium, a similar improvement in the symmetry of knee kinetics is also feasible. The purpose of this study was to determine if Genium MPK use would reduce the degree of asymmetry (DoA) of peak stance knee flexion moment compared to the C-Leg MPK in transfemoral amputation (TFA) patients...
September 2016: Technology and Innovation
https://www.readbyqxmd.com/read/28066520/gait-training-interventions-for-lower-extremity-amputees-a-systematic-literature-review
#12
M Jason Highsmith, Casey R Andrews, Claire Millman, Ashley Fuller, Jason T Kahle, Tyler D Klenow, Katherine L Lewis, Rachel C Bradley, John J Orriola
Lower extremity (LE) amputation patients who use prostheses have gait asymmetries and altered limb loading and movement strategies when ambulating. Subsequent secondary conditions are believed to be associated with gait deviations and lead to long-term complications that impact function and quality of life as a result. The purpose of this study was to systematically review the literature to determine the strength of evidence supporting gait training interventions and to formulate evidence statements to guide practice and research related to therapeutic gait training for lower extremity amputees...
September 2016: Technology and Innovation
https://www.readbyqxmd.com/read/28052440/positive-outcomes-following-gait-therapy-intervention-for-hip-osteoarthritis-a-longitudinal-study
#13
Deborah Solomonow-Avnon, Amir Herman, Daniel Levin, Nimrod Rozen, Eli Peled, Alon Wolf
: Footwear-generated biomechanical manipulation of lower-limb joints was shown to beneficially impact gait and quality of life in knee osteoarthritis patients, but has not been tested in hip osteoarthritis patients. We examined a customized gait treatment program using a biomechanical device shown in previous investigations to be capable of manipulating hip biomechanics via foot center of pressure (COP) modulation. The objective of this study was to assess the treatment program for hip osteoarthritis patients, enrolled in a 1-year prospective investigation, by means of objective gait and spatiotemporal parameters, and subjective quality of life measures...
January 4, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28052378/comparison-of-limb-kinematics-between-collected-and-lengthened-medium-extended-trot-in-two-groups-of-dressage-horses-on-two-different-surfaces
#14
V A Walker, C A Tranquille, J R Newton, S J Dyson, J Brandham, A J Northrop, R C Murray
BACKGROUND: Dressage horses are often asked to work in lengthened paces during training and competition, but to date there is limited information about the biomechanics of dressage-specific paces. Preliminary work has shown increased fetlock extension in extended compared with collected paces, but further investigation of the kinematic differences between collected, medium and extended trot in dressage horses is warranted. OBJECTIVES: Investigation of the effect of collected versus medium/extended trot on limb kinematics of dressage horses...
January 4, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/28046009/stiffness-effects-in-rocker-soled-shoes-biomechanical-implications
#15
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/28042857/estimation-of-ground-reaction-forces-and-moments-during-gait-using-only-inertial-motion-capture
#16
Angelos Karatsidis, Giovanni Bellusci, H Martin Schepers, Mark de Zee, Michael S Andersen, Peter H Veltink
Ground reaction forces and moments (GRF&M) are important measures used as input in biomechanical analysis to estimate joint kinetics, which often are used to infer information for many musculoskeletal diseases. Their assessment is conventionally achieved using laboratory-based equipment that cannot be applied in daily life monitoring. In this study, we propose a method to predict GRF&M during walking, using exclusively kinematic information from fully-ambulatory inertial motion capture (IMC). From the equations of motion, we derive the total external forces and moments...
December 31, 2016: Sensors
https://www.readbyqxmd.com/read/28038330/the-effects-of-a-simultaneous-cognitive-or-motor-task-on-the-kinematics-of-walking-in-older-fallers-and-non-fallers
#17
Renato Campos Freire Júnior, Jaqueline Mello Porto, Nise Ribeiro Marques, Paola Errera Magnani, Daniela Cristina Carvalho de Abreu
Human gait has been widely investigated under dual-task conditions because it has been demonstrated to be an important way to uncover differences in gait biomechanics between older fallers and non-fallers. However, exactly how simultaneous tasks affect the kinematics of walking remains unclear. In the present study, gait kinematic properties of older fallers and non-fallers were compared under cognitive and motor dual-task conditions. The gait kinematic properties of interest were recorded under three different conditions: walking at preferred speed, walking when performing a cognitive task (naming animals), and walking when performing a motor task (transferring a coin from one pocket to the other)...
December 27, 2016: Human Movement Science
https://www.readbyqxmd.com/read/28029280/biomechanics-of-an-orthosis-managed-cranial-cruciate-ligament-deficient-canine-stifle-joint-predicted-by-use-of-a-computer-model
#18
Gina E Bertocci, Nathan P Brown, Patrice M Mich
OBJECTIVE To evaluate effects of an orthosis on biomechanics of a cranial cruciate ligament (CrCL)-deficient canine stifle joint by use of a 3-D quasistatic rigid-body pelvic limb computer model simulating the stance phase of gait and to investigate influences of orthosis hinge stiffness (durometer). SAMPLE A previously developed computer simulation model for a healthy 33-kg 5-year-old neutered Golden Retriever. PROCEDURES A custom stifle joint orthosis was implemented in the CrCL-deficient pelvic limb computer simulation model...
January 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28018193/are-modular-activations-altered-in-lower-limb-muscles-of-persons-with-multiple-sclerosis-during-walking-evidence-from-muscle-synergies-and-biomechanical-analysis
#19
Tiziana Lencioni, Johanna Jonsdottir, Davide Cattaneo, Alessandro Crippa, Elisa Gervasoni, Marco Rovaris, Emilio Bizzi, Maurizio Ferrarin
Background: Persons with Multiple Sclerosis frequently have gait deficits that lead to diminished activities of daily living. Identification of motoneuron activity patterns may elucidate new insight into impaired locomotor coordination and underlying neural systems. The aim of the present study was to investigate muscle synergies, identified by motor modules and their activation profiles, in persons with Multiple Sclerosis (PwMS) during walking compared to those of healthy subjects (HS), as well as, exploring relationship of muscle synergies with walking ability of PwMS...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28007371/knee-kinematic-and-clinical-outcomes-evolution-before-3-months-and-1-year-after-total-knee-arthroplasty
#20
Alice Bonnefoy-Mazure, Stéphane Armand, Yoshisama Sagawa, Domizio Suvà, Hermes Miozzari, Katia Turcot
BACKGROUND: The aim of this study was to describe the evolution of kinematic and clinical outcomes of a large patient cohort with knee osteoarthritis from before surgery (V1) to 3 months (V2) and 1 year (V3) after a total knee arthroplasty (TKA). METHODS: The patients were evaluated at each visit (118 patients at V1, 93 patients at V2, and 79 patients at V3) during a clinical gait analysis and were compared with a matched control group of healthy adults (CG). The kinematic parameters, the Western Ontario and MacMaster Osteoarthritis Index (WOMAC), quality of life, and patient satisfaction were assessed...
April 4, 2016: Journal of Arthroplasty
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