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Biomechanics gait

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https://www.readbyqxmd.com/read/29339984/functional-vs-traditional-analysis-in-biomechanical-gait-data-an-alternative-statistical-approach
#1
Jihong Park, Matthew K Seeley, Devin Francom, C Shane Reese, J Ty Hopkins
In human motion studies, discrete points such as peak or average kinematic values are commonly selected to test hypotheses. The purpose of this study was to describe a functional data analysis and describe the advantages of using functional data analyses when compared with a traditional analysis of variance (ANOVA) approach. Nineteen healthy participants (age: 22 ± 2 yrs, body height: 1.7 ± 0.1 m, body mass: 73 ± 16 kg) walked under two different conditions: control and pain+effusion. Pain+effusion was induced by injection of sterile saline into the joint capsule and hypertonic saline into the infrapatellar fat pad...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339174/the-impact-of-strabismus-surgery-on-gait-pattern-in-patients-with-congenital-or-starting-within-one-year-of-age-strabismus
#2
Enrica Sipio, Anna Dickmann, Irene Aprile, Marco Germanotta, Chiara Simbolotti, Annabella Salerni, Gustavo Savino, Luca Padua
Strabismus is a common visual disorder that negatively affects walking and balance. Therapeutic interventions for strabismus include strabismus surgery. Few studies investigated the relationship between strabismus surgery and postural control while, to the best of our knowledge, none has been conducted to assess the influence of strabismus surgery on gait. Therefore, the aim of this study was to evaluate the locomotion characteristics over patients with congenital or starting within one year of age strabismus, one month and three months after strabismus surgery...
January 12, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29306147/the-effect-of-simulated-leg-length-discrepancy-on-lower-limb-biomechanics-during-gait
#3
Sam Khamis, Eli Carmeli
Understanding the effects of leg length discrepancy (LLD) on the biomechanics of gait and determining as to what extent of LLD alters gait is essential. A total of 91 biomechanical data were assessed from 14 lower limbs of healthy individuals walking under random conditions: shod only and with a 5, 10, 15, 20, 30 and 40 mm sole lift. Lower limb kinematics and dynamic leg length (DLL) were measured by a motion capture system. Hotelling's T-Square test was used to evaluate the differences in DLLs throughout the gait cycle in conjunction with differences between the sides based on the maximal stance phase and minimal swing phase DLLs...
December 28, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29305427/patient-specific-medial-unicompartmental-knee-arthroplasty-has-a-greater-protective-effect-on-articular-cartilage-in-the-lateral-compartment-a-finite-element-analysis
#4
K-T Kang, J Son, D-S Suh, S K Kwon, O-R Kwon, Y-G Koh
OBJECTIVES: Patient-specific (PS) implantation surgical technology has been introduced in recent years and a gradual increase in the associated number of surgical cases has been observed. PS technology uses a patient's own geometry in designing a medical device to provide minimal bone resection with improvement in the prosthetic bone coverage. However, whether PS unicompartmental knee arthroplasty (UKA) provides a better biomechanical effect than standard off-the-shelf prostheses for UKA has not yet been determined, and still remains controversial in both biomechanical and clinical fields...
January 2018: Bone & Joint Research
https://www.readbyqxmd.com/read/29289028/experience-does-not-influence-injury-related-joint-kinematics-and-kinetics-in-distance-runners
#5
Cristine E Agresta, Jillian Peacock, Jeffrey Housner, Ronald F Zernicke, Jessica Deneweth Zendler
PURPOSE: Increased running experience and more time spent running appears to be advantageous in reducing injury risk, although the reason behind this is unclear. It is plausible that more experience results in better running mechanics leading to less injuries. Running mechanics are often screened during clinical assessments and targeted for correction in gait retraining, particularly those thought to be global indicators of injury or those associated with elevated knee joint loading. Examining the biomechanics of runners who are less-injury prone can improve our understanding of the significance of faulty running mechanics in relation to injury...
December 20, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29276850/maintaining-stable-transfemoral-amputee-gait-on-level-sloped-and-simulated-uneven-conditions-in-a-virtual-environment
#6
James A Sturk, Edward D Lemaire, Emily H Sinitski, Nancy L Dudek, Markus Besemann, Jacqueline S Hebert, Natalie Baddour
PURPOSE: Describe and quantify how people with transfemoral amputations (TFA) maintain stable gait over a variety of surfaces; including, downhill and uphill, top and bottom-cross-slopes, medial-lateral translations, rolling hills and simulated rocky surfaces. METHODS: Ten TFA and ten matched people without amputations (NA) walked in a virtual environment with level, sloped and simulated uneven surfaces on a self-paced treadmill. Stability was quantified using medial-lateral margin of stability (ML-MoS), step parameters, and gait variability (standard deviations for speed, temporal-spatial parameters, foot clearance and root-mean-square of medial-lateral trunk acceleration)...
December 24, 2017: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/29276008/altered-kinematics-of-arm-swing-in-parkinson-s-disease-patients-indicates-declines-in-gait-under-dual-task-conditions
#7
Elise I Baron, Mandy Miller Koop, Matthew C Streicher, Anson B Rosenfeldt, Jay L Alberts
OBJECTIVE: Declines in simultaneous performance of a cognitive and motor task are present in Parkinson's disease due to compromised basal ganglia function related to information processing. The aim of this project was to determine if biomechanical measures of arm swing could be used as a marker of gait function under dual-task conditions in Parkinson's disease patients. METHODS: Twenty-three patients with Parkinson's disease completed single and dual-task cognitive-motor tests while walking on a treadmill at a self-selected rate...
December 19, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29249454/biomechanical-consequences-of-running-with-deep-core-muscle-weakness
#8
Margaret E Raabe, Ajit M W Chaudhari
The deep core muscles are often neglected or improperly trained in athletes. Improper function of this musculature may lead to abnormal spinal loading, muscle strain, or injury to spinal structures, all of which have been associated with increased low back pain (LBP) risk. The purpose of this study was to identify potential strategies used to compensate for weakness of the deep core musculature during running and to identify accompanying changes in compressive and shear spinal loads. Kinematically-driven simulations of overground running were created for eight healthy young adults in OpenSim at increasing levels of deep core muscle weakness...
December 6, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29247970/comprehensive-biomechanical-characterization-of-feet-in-usma-cadets-comparison-across-race-gender-arch-flexibility-and-foot-types
#9
Jinsup Song, Kersti Choe, Michael Neary, Rebecca A Zifchock, Kenneth L Cameron, Michael Trepa, Marian T Hannan, Howard Hillstrom
Lower extremity musculoskeletal injuries are common, complex, and costly problems. Literature supports associations between static foot structure and dynamic foot function, as well as between overuse injury and demographic characteristics. Previous studies failed to provide a comprehensive biomechanical foot characteristics of at-risk military personnel. In this study, foot structure, function, and arch height flexibility (AHF) were objectively measured in 1090 incoming cadets (16.3% female, mean age of 18...
December 6, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29234863/gait-analysis-in-short-term-follow-up-of-medial-opening-wedge-high-tibial-osteotomy
#10
Hésojy Gley Pereira Vital da Silva, Alessandro Rozim Zorzi, Heglayne Pereira Vital da Silva, João Batista de Miranda
BACKGROUND: Biomechanical gait changes are proposed as adaptations to medial knee osteoarthritis (OA), and little is known about which parameters can be modified early by high tibial osteotomy (HTO) surgery. The aim of this study was to identify early gait changes in a postoperative period of 6 months as compared to a control group, in three different spatial planes. METHODS: Twenty-one patients with OA were submitted to three-dimensional gait analysis preoperatively and 6 months after HTO surgery...
December 12, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/29218309/kinematic-changes-during-prolonged-fast-walking-in-old-and-young-adults
#11
Camila Fonseca Oliveira, Edgar Ramos Vieira, Filipa Manuel Machado Sousa, João Paulo Vilas-Boas
Walking biomechanics is known to be influenced by speed. However, most of the research examining the effects of walking speed and gait characteristics has been conducted after a fast-walking task, neglecting the changes that may occur during the task. The aim of the present study was to determine the impact of fast-walking over time on kinematics in young and old adults. Twenty-seven young adults (26.6 ± 6.0 years) and 23 old adults (71.0 ± 5.6 years) walked at 70% of their maximum heart rate for 20 min or until exhaustion, and the effects of fast-walking on temporospatial parameters and on angular kinematics were analyzed during the activity...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/29214918/effects-of-knee-orthosis-adjustment-on-biomechanical-performance-and-clinical-outcome-in-patients-with-medial-knee-osteoarthritis
#12
Andreas Brand, Isabella Klöpfer-Krämer, Mario Morgenstern, Inga Kröger, Björn Michel, Andreas Thannheimer, Janina Anna Müßig, Peter Augat
BACKGROUND: Valgus bracing in medial knee osteoarthritis aims to improve gait function by reducing the loading of the medial compartment. Orthosis composition and optimal adjustment is essential to achieve biomechanical and clinical effectiveness. OBJECTIVES: To investigate biomechanical functionality during gait, pain relief and compliance in patients with knee osteoarthritis using a lightweight adjustable knee unloader orthosis. STUDY DESIGN: Prospective observational clinical trial...
December 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/29207289/accuracy-evaluation-of-a-method-to-partition-ground-reaction-force-and-center-of-pressure-in-cane-assisted-gait-using-an-instrumented-cane-with-a-triaxial-force-sensor
#13
Arinori Kamono, Mizuki Kato, Naomichi Ogihara
Clarifying the biomechanics of cane-assisted gait in elderly individuals and patients with gait disorders is important for developing better therapeutic interventions in the fields of rehabilitation and orthopedics. However, if the foot and the cane in the ipsilateral hand are placed on the same force plate simultaneously, the force plate cannot separate the forces as it records the sum of the forces. To overcome this indeterminacy problem of the ground reaction force (GRF) and the center of pressure (COP) in cane-assisted gait analysis, a method to partition the GRF and COP using an instrumented cane with a force transducer has been proposed...
November 28, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29194747/standardization-of-hemipelvis-alignment-for-in-vitro-biomechanical-testing
#14
Federico Morosato, Francesco Traina, Luca Cristofolini
Although in vitro biomechanical tests are regularly performed, the definition of a suitable reference frame for hemipelvic specimens is still a challenge. The aims of the present study were to: (1) define a reference frame for the human hemipelvis suitable for in vitro applications, based on robust anatomical landmarks; (2) identify the alignment of a hemipelvis based on the alignment of a whole pelvis (including right/left and male/female differences); (3) identify the relative alignment of the proposed in vitro reference frame with respect to a reference frame commonly used in gait analysis; (4) create an in vitro alignment procedure easy, robust and inexpensive; (5) quantify the intra-operator repeatability and inter-operator reproducibility of the procedure...
November 30, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29191634/a-mathematical-analysis-to-address-the-6-degree-of-freedom-segmental-power-imbalance
#15
Anahid Ebrahimi, John D Collins, Thomas M Kepple, Kota Z Takahashi, Jill S Higginson, Steven J Stanhope
Segmental power is used in human movement analyses to indicate the source and net rate of energy transfer between the rigid bodies of biomechanical models. Segmental power calculations are performed using segment endpoint dynamics (kinetic method). A theoretically equivalent method is to measure the rate of change in a segment's mechanical energy state (kinematic method). However, these two methods have not produced experimentally equivalent results for segments proximal to the foot, with the difference in methods deemed the "power imbalance...
November 6, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29189099/creative-prosthetic-foot-selection-enables-successful-ambulation-in-stiletto-high-heels
#16
Elizabeth Russell Esposito, Delbert H Lipe, Christopher A Rábago
BACKGROUND: Walking in high heels presents biomechanical challenges, yet they remain part of many women's attire. However, women with a lower limb amputation are limited in available footwear options. Case description and methods: This case study is in response to one patient's assertion that she walked better and more symmetrically in heels than flat shoes with her below-knee prosthesis. She underwent gait analysis in athletic shoes and 10-cm stiletto high heels worn with a pediatric running foot to determine if these claims could be substantiated through biomechanical measures...
November 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/29184756/balance-control-during-gait-initiation-state-of-the-art-and-research-perspectives
#17
REVIEW
Eric Yiou, Teddy Caderby, Arnaud Delafontaine, Paul Fourcade, Jean-Louis Honeine
It is well known that balance control is affected by aging, neurological and orthopedic conditions. Poor balance control during gait and postural maintenance are associated with disability, falls and increased mortality. Gait initiation - the transient period between the quiet standing posture and steady state walking - is a functional task that is classically used in the literature to investigate how the central nervous system (CNS) controls balance during a whole-body movement involving change in the base of support dimensions and center of mass progression...
November 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/29179887/biomechanical-analysis-of-dance-for-parkinson-s-disease-a-paradoxical-case-study-of-balance-and-gait-effects
#18
Kristen L Sowalsky, Jill Sonke, Lori J P Altmann, Leonardo Almeida, Chris J Hass
OBJECTIVES: This study aimed to measure the effects of a dance training program on subjective and objective balance and gait measures in a person with Parkinson's disease. DESIGN AND SETTING: The participant was measured via clinical scales and biomechanical balance and gait analyses pre- and post-16 weeks of dance participation at the University Center for Arts in Medicine. The dance program consisted of 75 minute sessions three days a week. RESULTS: Improved clinical scales included the Schwab and England scale (+10%), falls efficacy scale (-11 points), six-minute walk (+15...
November 2017: Explore: the Journal of Science and Healing
https://www.readbyqxmd.com/read/29179693/unloading-shoes-for-intermittent-claudication-a-randomised-crossover-trial
#19
Garry A Tew, Ahmed Shalan, Alastair R Jordan, Liz Cook, Elizabeth S Coleman, Caroline Fairhurst, Catherine Hewitt, Stephen W Hutchins, Andrew Thompson
BACKGROUND: The purpose of this study was to assess the functional effects and acceptability of rocker-soled shoes that were designed to relatively "unload" the calf muscles during walking in people with calf claudication due to peripheral arterial disease. METHODS: In this randomised AB/BA crossover trial, participants completed two assessment visits up to two weeks apart. At each visit, participants completed walking tests whilst wearing the unloading shoes or visually-similar control shoes...
November 28, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29172095/innovations-and-pitfalls-in-the-use-of-wearable-devices-in-the-prevention-and-rehabilitation-of-running-related-injuries
#20
Richard W Willy
Running-related injuries are common and are associated with a high rate of reoccurrence. Biomechanics and errors in applied training loads are often cited as causes of running-related injuries. Clinicians and runners are beginning to utilize wearable technologies to quantify biomechanics and training loads with the hope of reducing the incidence of running-related injuries. Wearable devices can objectively assess biomechanics and training loads in runners, yet guidelines for their use by clinicians and runners are not currently available...
October 6, 2017: Physical Therapy in Sport
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