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Biomechanics gait

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https://www.readbyqxmd.com/read/28224442/report-of-the-primary-outcomes-for-gait-mechanics-in-men-of-the-acl-sports-trial-secondary-prevention-with-and-without-perturbation-training-does-not-restore-gait-symmetry-in-men-1-or-2-years-after-acl-reconstruction
#1
Jacob John Capin, Ryan Zarzycki, Amelia Arundale, Kathleen Cummer, Lynn Snyder-Mackler
BACKGROUND: Movement asymmetries during walking are common after anterior cruciate ligament (ACL) injury and reconstruction and may influence the early development of posttraumatic osteoarthritis. Preoperative neuromuscular training (like perturbation training, which is neuromuscular training requiring selective muscle activation in response to surface perturbations) improves gait asymmetries and functional outcomes among people who are ACL-deficient, but the effect of postoperative perturbation training on gait mechanics after ACL reconstruction is unknown...
February 21, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28222057/effects-of-toe-in-and-wider-step-width-in-stair-ascent-with-different-knee-alignments
#2
Hunter J Bennett, Songning Zhang, Guangping Shen, Joshua T Weinhandl, Max R Paquette, Jeffrey Reinbolt, Dawn P Coe
PURPOSE: Toe-in (TI) and toe-in with wider step width (TIW) gait modifications have successfully reduced the internal peak knee adduction moment (KAM) during level walking and stair ascent tasks, respectively, for healthy and knee osteoarthritis populations. However, the concurrent effects of these modifications have not previously been combined to reduce both the first and the second peak KAM during stair ascent or tested among the different knee alignment groups. Therefore, the purpose of this study was to examine effects of TI and TIW gait modifications on knee biomechanics during stair ascent in individuals with varus, neutral, and valgus knee alignments...
March 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28209345/multiobjective-optimization-of-cartilage-stress-for-non-invasive-patient-specific-recommendations-of-high-tibial-osteotomy-correction-angle-a-novel-method-to-investigate-alignment-correction
#3
Keke Zheng, Corey J Scholes, Junning Chen, David Parker, Qing Li
Medial opening wedge high tibial osteotomy (MOWHTO) is a surgical procedure to treat knee osteoarthritis associated with varus deformity. However, the ideal final alignment of the Hip-Knee-Ankle (HKA) angle in the frontal plane, that maximizes procedural success and post-operative knee function, remains controversial. Therefore, the purpose of this study was to introduce a subject-specific modeling procedure in determining the biomechanical effects of MOWHTO alignment on tibiofemoral cartilage stress distribution...
February 13, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28203036/evidence-of-big-five-and-aggressive-personalities-in-gait-biomechanics
#4
Liam Satchell, Paul Morris, Chris Mills, Liam O'Reilly, Paul Marshman, Lucy Akehurst
Behavioral observation techniques which relate action to personality have long been neglected (Furr and Funder in Handbook of research methods in personality psychology, The Guilford Press, New York, 2007) and, when employed, often use human judges to code behavior. In the current study we used an alternative to human coding (biomechanical research techniques) to investigate how personality traits are manifest in gait. We used motion capture technology to record 29 participants walking on a treadmill at their natural speed...
2017: Journal of Nonverbal Behavior
https://www.readbyqxmd.com/read/28195986/functional-bracing-after-anterior-cruciate-ligament-reconstruction-a-systematic-review
#5
Walter R Lowe, Ryan J Warth, Elizabeth P Davis, Lane Bailey
INTRODUCTION: The purpose of this study was to evaluate the current literature on the use of functional knee braces after anterior cruciate ligament (ACL) reconstruction with respect to clinical and in vivo biomechanical data. METHODS: A systematic search of both the PubMed and Embase databases was performed to identify all studies that reported clinical and/or in vivo biomechanical results of functional bracing versus nonbracing after ACL reconstruction. Extracted data included study design, surgical reconstruction techniques, postoperative rehabilitation protocols, objective outcomes, and subjective outcomes scores...
March 2017: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/28185728/skeletal-fluorosis-in-marsupials-a-comparison-of-bone-lesions-in-six-species-from-an-australian-industrial-site
#6
Clare Death, Graeme Coulson, Uwe Kierdorf, Horst Kierdorf, Richard Ploeg, Simon M Firestone, Ian Dohoo, Jasmin Hufschmid
In this study we explored the prevalence, type, location and severity of skeletal lesions in six species of Australian marsupial (Macropus giganteus, Notamacropus rufogriseus, Wallabia bicolor, Phascolarctos cinereus, Trichosurus vulpecula and Pseudocheirus peregrinus) from high and low-fluoride environments. Lesions occurred to varying extents in all species, and lesion distribution varied with biomechanical differences in gait and mastication. Bone fluoride levels increased with severity of periosteal hyperostosis...
February 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28182797/can-real-time-visual-feedback-during-gait-retraining-reduce-metabolic-demand-for-individuals-with-transtibial-amputation
#7
Elizabeth Russell Esposito, Harmony S Choi, Benjamin J Darter, Jason M Wilken
The metabolic demand of walking generally increases following lower extremity amputation. This study used real-time visual feedback to modify biomechanical factors linked to an elevated metabolic demand of walking in individuals with transtibial amputation. Eight persons with unilateral, traumatic transtibial amputation and 8 uninjured controls participated. Two separate bouts of real-time visual feedback were provided during a single session of gait retraining to reduce 1) center of mass sway and 2) thigh muscle activation magnitudes and duration...
2017: PloS One
https://www.readbyqxmd.com/read/28174604/challenging-the-foundations-of-the-clinical-model-of-foot-function-further-evidence-that-the-root-model-assessments-fail-to-appropriately-classify-foot-function
#8
Hannah L Jarvis, Christopher J Nester, Peter D Bowden, Richard K Jones
BACKGROUND: The Root model of normal and abnormal foot function remains the basis for clinical foot orthotic practice globally. Our aim was to investigate the relationship between foot deformities and kinematic compensations that are the foundations of the model. METHODS: A convenience sample of 140 were screened and 100 symptom free participants aged 18-45 years were invited to participate. The static biomechanical assessment described by the Root model was used to identify five foot deformities...
2017: Journal of Foot and Ankle Research
https://www.readbyqxmd.com/read/28173988/gender-differences-in-the-restoration-of-knee-joint-biomechanics-during-gait-after-anterior-cruciate-ligament-reconstruction
#9
Makoto Asaeda, Masataka Deie, Naoto Fujita, Yoshifumi Kono, Chiaki Terai, Wataru Kuwahara, Hodaka Watanabe, Hiroaki Kimura, Nobuo Adachi, Toru Sunagawa, Mitsuo Ochi
BACKGROUND: The aim of our study was to evaluate the effects of gender on recovery of knee joint biomechanics over the stance phase of gait after reconstruction of the anterior cruciate ligament (ACL). METHODS: Gait parameters and knee joint kinematics and kinetics were compared in 32 patients (16 male and 16 female) who underwent ACL reconstruction for a unilateral ACL deficiency, with comparison to an age-, height-, and weight-matched Control group. Knee flexion, adduction and tibial rotation angles were measured and knee extension and abduction moment was calculated by inverse dynamics methods...
February 4, 2017: Knee
https://www.readbyqxmd.com/read/28167093/effect-of-cue-timing-and-modality-on-gait-initiation-in-parkinson-s-disease-with-freezing-of-gait
#10
Chiahao Lu, Sommer L Amundsen Huffmaster, Paul J Tuite, Jacqueline M Vachon, Colum D MacKinnon
OBJECTIVE: To examine the effects of cue timing, across three sensory modalities, on anticipatory postural adjustments (APAs) during gait initiation in people with Parkinson's disease (PD). DESIGN: Observational study. SETTING: Biomechanics research laboratory. PARTICIPANTS: Twenty-five individuals with idiopathic PD (11 with freezing of gait, FOG) were studied in the off-levodopa state (12-hour overnight withdrawal)...
February 3, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28164375/pedunculopontine-network-dysfunction-in-parkinson-s-disease-with-postural-control-and-sleep-disorders
#11
Cecile Gallea, Claire Ewenczyk, Bertrand Degos, Marie-Laure Welter, David Grabli, Smaranda Leu-Semenescu, Romain Valabregue, Pierre Berroir, Lydia Yahia-Cherif, Eric Bertasi, Sara Fernandez-Vidal, Eric Bardinet, Emmanuel Roze, Habib Benali, Cyril Poupon, Chantal François, Isabelle Arnulf, Stéphane Lehéricy, Marie Vidailhet
BACKGROUND: The objective of this study was to investigate pedunculopontine nucleus network dysfunctions that mediate impaired postural control and sleep disorder in Parkinson's disease. METHODS: We examined (1) Parkinson's disease patients with impaired postural control and rapid eye movement sleep behavior disorder (further abbreviated as sleep disorder), (2) Parkinson's disease patients with sleep disorder only, (3) Parkinson's disease patients with neither impaired postural control nor sleep disorder, and (4) healthy volunteers...
February 6, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28158961/people-with-chronic-neck-pain-walk-with-a-stiffer-spine
#12
Deborah Falla, Leonardo Gizzi, Hesam Parsa, Angela Dieterich, Frank Petzke
Study Design Case-control. Background People with chronic neck pain present a number of sensorimotor and biomechanical alterations, yet little is known about the influence of neck pain on gait and motions of the spine during gait. Objective To evaluate the spine kinematics and gait characteristics in people with non-specific chronic neck pain. Methods People with chronic non-specific neck pain and age and gender matched asymptomatic controls walked on a treadmill at three different speeds (self-selected, 3km/h, 5km/h) either with their head in a neutral position or rotated 30º...
February 3, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28155677/finite-element-analysis-of-the-valgus-knee-joint-of-an-obese-child
#13
Jun Sun, Songhua Yan, Yan Jiang, Duo Wai-Chi Wong, Ming Zhang, Jizhou Zeng, Kuan Zhang
BACKGROUND: Knee valgus and varus morbidity is at the second top place in children lower limb deformity diseases. It may cause abnormal stress distribution. The magnitude and location of contact forces on tibia plateau during gait cycle have been indicated as markers for risk of osteoarthritis. So far, few studies reported the contact stress and force distribution on tibial plateau of valgus knee of children. METHODS: To estimate the contact stresses and forces on tibial plateau of an 8-year old obese boy with valgus knee and a 7-year old healthy boy, three-dimensional (3D) finite element (FE) models of their left knee joints were developed...
December 28, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28155591/impact-of-an-implanted-neuroprosthesis-on-community-ambulation-in-incomplete-sci
#14
Lisa M Lombardo, Rudolf Kobetic, Gilles Pinault, Kevin M Foglyano, Stephanie N Bailey, Stephen Selkirk, Ronald J Triolo
OBJECTIVE: Test the effect of a multi-joint control with implanted electrical stimulation on walking after spinal cord injury (SCI). DESIGN: Single subject research design with repeated measures Setting: Hospital-based biomechanics laboratory and user assessment of community use. PARTICIPANTS: Female with C6 AIS C SCI 30 years post injury. INTERVENTIONS: Lower extremity muscle activation with an implanted pulse generator and gait training...
February 3, 2017: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/28150869/biochemical-markers-of-cartilage-metabolism-are-associated-with-walking-biomechanics-six-months-following-anterior-cruciate-ligament-reconstruction
#15
Brian Pietrosimone, Richard F Loeser, J Troy Blackburn, Darin A Padua, Matthew S Harkey, Laura E Stanley, Brittney A Luc-Harkey, Veronica Ulici, Stephen W Marshall, Joanne M Jordan, Jeffery T Spang
The purpose of our study was to determine the association between biomechanical outcomes of walking gait (peak vertical ground reaction force [vGRF], vGRF loading rate [vGRF-LR] and knee adduction moment [KAM]) six months following anterior cruciate ligament reconstruction (ACLR) and biochemical markers of serum type-II collagen turnover (collagen type-II cleavage product to collagen type-II C-propeptide [C2C:CPII]), plasma degenerative enzymes (matrix metalloproteinase-3 [MMP-3]), and a pro-inflammatory cytokine (interleukin-6 [IL-6])...
February 2, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28149661/biomechanical-podiatric-evaluation-in-an-italian-cohort-of-patients-with-systemic-sclerosis-a-pilot-study
#16
Susanna Maddali Bongi, Giovanni Ravenni, Benedetta Ciampi, Angela Del Rosso, Khadija El Aoufy
OBJECTIVE: Foot problems are often present in Systemic Sclerosis (SSc) patients, however studies regarding podiatric problems related to SSc are lacking and there are no data evaluating the foot biomechanical changes. The aim of the present pilot study was to evaluate podiatric problems in an Italian cohort of SSc patients by assessing received podiatric services, foot pain and disability and biomechanical foot deformity. MATERIAL AND METHODS: 25 consecutive SSc patients were enrolled from the Division of Rheumatology, University of Florence...
December 2016: European Journal of Rheumatology
https://www.readbyqxmd.com/read/28144406/fatigue-effect-on-linear-center-of-pressure-measures-during-gait-in-people-with-flat-feet
#17
Mohammad Ali Sanjari, Sahar Boozari, Ali Ashraf Jamshidi, Mohammad Reza Nikmaram
BACKGROUND: Flat foot, as one of the common foot deformities can affect gait biomechanics and risk of lower extremity injury. Fatigue, as a high load task, can also change biomechanical parameters of locomotion. Studying normal and flat footed individuals under high load tasks such as fatigue can elucidate their differences more easily. OBJECTIVES: In this study, center of pressure (CoP) changes were studied between individuals with flat and normal feet after fatigue...
December 2016: Asian Journal of Sports Medicine
https://www.readbyqxmd.com/read/28143497/gait-disorders-in-the-elderly-and-dual-task-gait-analysis-a-new-approach-for-identifying-motor-phenotypes
#18
Bernard Auvinet, Claude Touzard, François Montestruc, Arnaud Delafond, Vincent Goeb
BACKGROUND: Gait disorders and gait analysis under single and dual-task conditions are topics of great interest, but very few studies have looked for the relevance of gait analysis under dual-task conditions in elderly people on the basis of a clinical approach. METHODS: An observational study including 103 patients (mean age 76.3 ± 7.2, women 56%) suffering from gait disorders or memory impairment was conducted. Gait analysis under dual-task conditions was carried out for all patients...
January 31, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28135662/trunk-and-lower-limb-biomechanics-during-stair-climbing-in-people-with-and-without-symptomatic-femoroacetabular-impingement
#19
Connor A Hammond, Gillian L Hatfield, Michael K Gilbart, S Jayne Garland, Michael A Hunt
BACKGROUND: Femoroacetabular impingement is a pathomechanical hip condition leading to pain and impaired physical function. It has been shown that those with femoroacetabular impingement exhibit altered gait characteristics during level walking and stair climbing, and decreased muscle force production during isometric muscle contractions. However, no studies to-date have looked at trunk kinematics or muscle activation during dynamic movements such as stair climbing in this patient population...
February 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28128475/cyclops-lesions-are-associated-with-altered-gait-patterns-and-medial-knee-joint-cartilage-degeneration-at-one-year-after-acl-reconstruction
#20
Michael A Samaan, Luca Facchetti, Valentina Pedoia, Matthew S Tanaka, Thomas M Link, Richard B Souza, C Benjamin Ma, Xiaojuan Li
In this exploratory study, gait analysis and quantitative MRI (QMRI) were used to assess biomechanical differences in patients that present with cyclops lesions at 12 months after ACL-reconstruction (ACLR). Thirty ACLR patients without and 10 ACLR patients with cyclops lesions underwent 3T MR T1ρ mapping of the reconstructed knee joint prior to ACLR and at 12 months after ACLR, as well as a gait assessment during a fixed walking speed at 12 months after ACLR. Both external sagittal and frontal plane knee joint moments and joint moment impulses were calculated and assessed throughout the stance phase of gait...
January 27, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
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