keyword
MENU ▼
Read by QxMD icon Read
search

Lower limb kinematics

keyword
https://www.readbyqxmd.com/read/29775910/hip-and-patellofemoral-joint-loading-during-gait-are-increased-in-children-with-idiopathic-torsional-deformities
#1
Elyse Passmore, H Kerr Graham, Marcus G Pandy, Morgan Sangeux
BACKGROUND: Torsional deformities of the femur and tibia are associated with gait impairments and joint pain. Several studies have investigated these gait deviations in children with cerebral palsy. However, relatively little is known about gait deviations in children with idiopathic torsion and debate ensues about the management of these patients. RESEARCH QUESTION: What are the effects of idiopathic increased femoral neck anteversion and external tibial torsion on lower-limb kinematics, kinetics and joint loading during gait in children and adolescents...
May 9, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29772495/walking-variations-in-healthy-women-wearing-high-heeled-shoes-shoe-size-and-heel-height-effects
#2
Enrica Di Sipio, Giulia Piccinini, Cristiano Pecchioli, Marco Germanotta, Chiara Iacovelli, Chiara Simbolotti, Arianna Cruciani, Luca Padua
BACKGROUND: The use of high heels is widespread in modern society in professional and social contests. Literature showed that wearing high heels can produce injurious effects on several structures from the toes to the pelvis. No studies considered shoe length as an impacting factor on walking with high heels. RESEARCH QUESTION: The aim of this study is to evaluate walking parameters in young healthy women wearing high heels, considering not only the heel height but also the foot/shoe size...
May 3, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29772411/regulation-of-hip-joint-kinetics-for-increasing-angular-momentum-during-the-initiation-of-a-pirouette-en-dehors-in-classical-ballet
#3
Akiko Imura, Yoichi Iino
This study examined how dancers regulate the hip joint kinetics to coordinate the upper and lower body angular momenta with the increased rotation of pirouette en dehors (pirouette) during the preparation. During the preparation of the pirouette, the upper body rotates greatly about the vertical axis; however, the lower extremity remains relatively stationary. Therefore, there must be specific control at the hip to coordinate the upper and lower body angular momenta in turns of increased rotation. Kinematics and kinetics of single to quadruple pirouettes performed by eight ballet dancers were analysed using a motion capture system and force plates...
May 12, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29768121/a-biomechanical-comparison-of-initial-sprint-acceleration-performance-and-technique-in-an-elite-athlete-with-cerebral-palsy-and-able-bodied-sprinters
#4
Ian N Bezodis, James Cowburn, Adam Brazil, Rhian Richardson, Cassie Wilson, Timothy A Exell, Gareth Irwin
Cerebral palsy is known to generally limit range of motion and force producing capability during movement. It also limits sprint performance, but the exact mechanisms underpinning this are not well known. One elite male T36 multiple-Paralympic sprint medallist (T36) and 16 well-trained able-bodied (AB) sprinters each performed 5-6 maximal sprints from starting blocks. Whole-body kinematics (250 Hz) in the block phase and first two steps, and synchronised external forces (1,000 Hz) in the first stance phase after block exit were combined to quantify lower limb joint kinetics...
May 16, 2018: Sports Biomechanics
https://www.readbyqxmd.com/read/29763812/computation-of-hip-rotation-kinematics-retrospectively-using-functional-knee-calibration-during-gait
#5
Morgan Sangeux
BACKGROUND: Hip rotation kinematics during gait is a key parameter to support clinical decision making, for example in children with lower limb torsional deformities. However, hip rotation kinematics is also one of the least repeatable parameter because it is difficult to locate the position of the medio-lateral axis of the femur. Functional knee calibration provides an alternative to locate the medio-lateral axis of the femur and may be performed retrospectively, using the movement of the knee joint during gait...
May 8, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29755336/a-subject-specific-kinematic-model-to-predict-human-motion-in-exoskeleton-assisted-gait
#6
Diego Torricelli, Camilo Cortés, Nerea Lete, Álvaro Bertelsen, Jose E Gonzalez-Vargas, Antonio J Del-Ama, Iris Dimbwadyo, Juan C Moreno, Julian Florez, Jose L Pons
The relative motion between human and exoskeleton is a crucial factor that has remarkable consequences on the efficiency, reliability and safety of human-robot interaction. Unfortunately, its quantitative assessment has been largely overlooked in the literature. Here, we present a methodology that allows predicting the motion of the human joints from the knowledge of the angular motion of the exoskeleton frame. Our method combines a subject-specific skeletal model with a kinematic model of a lower limb exoskeleton (H2, Technaid), imposing specific kinematic constraints between them...
2018: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/29753125/adaptation-of-kinematic-synergy-and-postural-control-to-mechanical-ankle-constraint-on-an-unsteady-stance-surface
#7
Yi-Ying Tsai, Gwo-Ching Chang, Ing-Shiou Hwang
Joint constraint interferes with the coordinative structure in joint movements used to optimize postural stability. This study aimed to investigate changes in postural synergy when the ankle joints were bilaterally braced during a stabilometer stance. Twenty-four young adults stood on a stabilometer plate while wearing a pair of ankle-foot orthoses, which were either unlocked or locked to restrict ankle motion (the ankle constraint (AC) and non-constraint (NC) conditions). Although ankle constraint did not significantly affect the dynamics of the stabilometer movements, the size and regularity of the first principal component (PC1), which explained more than 80% of the variance of joint movements in the lower limb, were increased...
May 9, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29751322/gait-deviations-in-duchenne-muscular-dystrophy-part-2-statistical-non-parametric-mapping-to-analyze-gait-deviations-in-children-with-duchenne-muscular-dystrophy
#8
Marije Goudriaan, Marleen Van den Hauwe, Cristina Simon-Martinez, Catherine Huenaerts, Guy Molenaers, Nathalie Goemans, Kaat Desloovere
BACKGROUND: Prolonged ambulation is considered important in children with Duchenne muscular dystrophy (DMD). However, previous studies analyzing DMD gait were sensitive to false positive outcomes, caused by uncorrected multiple comparisons, regional focus bias, and inter-component covariance bias. Also, while muscle weakness is often suggested to be the main cause for the altered gait pattern in DMD, this was never verified. RESEARCH QUESTION: Our research question was twofold: 1) are we able to confirm the sagittal kinematic and kinetic gait alterations described in a previous review with statistical non-parametric mapping (SnPM)? And 2) are these gait deviations related to lower limb weakness? METHODS: We compared gait kinematics and kinetics of 15 children with DMD and 15 typical developing (TD) children (5-17 years), with a two sample Hotelling's T2 test and post-hoc two-tailed, two-sample t-test...
April 30, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29747079/mechanical-effects-of-medial-and-lateral-wedged-orthoses-during-running
#9
Jonathan Sinclair
OBJECTIVE: The aim of the current investigation was to examine the effects of orthoses with 5° medial and lateral wedges on knee joint kinetics during the stance phase of running. DESIGN: Repeated measures. SETTING: Laboratory. PARTICIPANTS: Twelve recreational runners. OUTCOME MEASUREMENTS: Twelve male participants ran over a force platform at 4.0 m/s in three different conditions (medial orthotic, lateral orthotic and no-orthotic)...
May 3, 2018: Physical Therapy in Sport
https://www.readbyqxmd.com/read/29747067/more-symmetrical-gait-after-split-belt-treadmill-walking-does-not-modify-dynamic-and-postural-balance-in-individuals-post-stroke
#10
Carole Miéville, Séléna Lauzière, Martina Betschart, Sylvie Nadeau, Cyril Duclos
Spontaneous gait is often asymmetrical in individuals post-stroke, despite their ability to walk more symmetrically on demand. Given the sensorimotor deficits in the paretic limb, this asymmetrical gait may facilitate balance maintenance. We used a split-belt walking protocol to alter gait asymmetry and determine the effects on dynamic and postural balance. Twenty individuals post-stroke walked on a split-belt treadmill. In two separate periods, the effects of walking with the non-paretic leg, and then the paretic one, on the faster belt on spatio-temporal symmetry and balance were compared before and after these perturbation periods...
April 24, 2018: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29746537/kinetic-and-kinematic-variables-affecting-trunk-flexion-during-level-walking-in-patients-with-lumbar-spinal-stenosis
#11
Tatsuya Igawa, Junji Katsuhira, Akira Hosaka, Kenta Uchikoshi, Shinichi Ishihara, Ko Matsudaira
Lumbar spinal stenosis causes cauda equina and nerve root compression, resulting in neurological symptoms. Although trunk flexion during level walking may alleviate these symptoms by enabling spinal canal decompression, some patients do not use this strategy. We aimed to identify the kinetic and kinematic variables that affect trunk flexion in patients during level walking. Gait was recorded in 111 patients using a three-dimensional motion capture system and six force plates. From the data recorded, walking velocity, bilateral step length, cycle time, maximum trunk flexion angle, forward pelvic tilt angle, pelvic rotation angle, maximum and minimum joint angles, and moment and power of the lower limb were calculated...
2018: PloS One
https://www.readbyqxmd.com/read/29745599/-analysis-of-the-relevance-of-age-and-toe-out-angle-of-normal-adults-gait
#12
Linyan Gu, Huaping Qiu, Shengyu Zhang, Yidan Chen, Ying Xu, Xiaoqing Jin, Gangmin Ning
Due to the decline of motor ability and the impact of the diseases, abnormalities in gait is common in the elderly population, which will raise the risk of fall and cause serious injury. This study focuses on the analysis of the gait kinematics parameters of normal adults' gait, aiming to investigate the characteristics of gait parameters in different age groups and to explore the role of gait parameters in motor function assessment and clinical diagnosis. Based on the gait data gained by electronic walkway, the relationship among the toe out angles and their correlation with age and gender etc...
February 1, 2018: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
https://www.readbyqxmd.com/read/29741134/recovery-and-compensation-after-robotic-assisted-gait-training-in-chronic-stroke-survivors
#13
Alice De Luca, Honoré Vernetti, Cristina Capra, Ivano Pisu, Cinzia Cassiano, Laura Barone, Federica Gaito, Federica Danese, Giovanni Antonio Checchia, Carmelo Lentino, Psiche Giannoni, Maura Casadio
BACKGROUND: Gait re-education is a primary rehabilitation goal after stroke. In the last decades, robots with different mechanical structures have been extensively used in the clinical practice for gait training of stroke survivors. However, the effectiveness of robotic training is still controversial, especially for chronic subjects. In this study, we investigated the short-term effects of gait training assisted by an endpoint robot in a population of chronic stroke survivors. METHODS: Subjects were evaluated before and after training with clinical scales and instrumented gait analysis...
May 9, 2018: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/29734063/neuromechanical-adaptations-to-slippery-sport-shoes
#14
Cédric Y M Morio, Alexis Herbaut
Although shoe friction has been widely studied in occupational ergonomics, information was lacking about friction in sport shoes. The purpose of the study was to examine the neuromechanical adaptations to different shoe-surface interface in an aerobic-gym specific movement. Sixteen females performed 10 change of direction movements in two shoe conditions differing by their outsoles (ethyl-vinyl-acetate: EVA and rubber: RB) to ensure significant differences in mechanical coefficients of friction (EVA = 0...
May 4, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29725704/substituting-anticipatory-locomotor-adjustments-online-is-time-constrained
#15
Bradford J McFadyen, Félix Fiset, Caroline Charette
Two crucial, multi-articular strategies for anticipatory locomotor adjustments (ALA) are knee flexor generation to step over obstacles and hip flexor generation to step up. While lower limb control can be adapted online to modify an already planned obstacle avoidance, or to avoid the sudden appearance of an obstacle, it is not known whether a planned ALA can be substituted by different one online. The present objective was to study such ALA substitutions at two specific timepoints: the final planning stage and the initiation of ALA execution...
May 3, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29716723/experimental-evaluation-of-current-and-novel-approximations-of-articular-surfaces-of-the-ankle-joint
#16
Claudio Belvedere, Sorin Siegler, Andrea Ensini, Jason Toy, Paolo Caravaggi, Ramya Namani, Luca Giuseppe Princi, Stefano Durante, Alberto Leardini
Kinematics and flexibility properties of both natural and replaced ankle joints are affected by the geometry of the articulating surfaces. Recent studies proposed an original saddle-shaped, skewed, truncated cone with laterally oriented apex, as tibiotalar contact surfaces for ankle prosthesis. The goal of this study was to compare in vitro this novel design with traditional cylindrical or medially centered conic geometries in terms of their ability to replicate the natural ankle joint mechanics. Ten lower limb cadaver specimens underwent a validated process of custom design for the replacement of the natural ankle joint...
April 24, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29704789/coordinative-structuring-of-gait-kinematics-during-adaptation-to-variable-and-asymmetric-split-belt-treadmill-walking-a-principal-component-analysis-approach
#17
Jacob W Hinkel-Lipsker, Michael E Hahn
Gait adaptation is a task that requires fine-tuned coordination of all degrees of freedom in the lower limbs by the central nervous system. However, when individuals change their gait it is unknown how this coordination is organized, and how it can be influenced by contextual interference during practice. Such knowledge could provide information about measurement of gait adaptation during rehabilitation. Able-bodied individuals completed an acute bout of asymmetric split-belt treadmill walking, where one limb was driven at a constant velocity and the other according to one of three designed practice paradigms: serial practice, where the variable limb belt velocity increased over time; random blocked practice, where every 20 strides the variable limb belt velocity changed randomly; random practice, where every stride the variable limb belt velocity changed randomly...
April 25, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29700560/greater-fear-of-reinjury-is-related-to-stiffened-jump-landing-biomechanics-and-muscle-activation-in-women-after-acl-reconstruction
#18
Stephanie M Trigsted, Dane B Cook, Kristen A Pickett, Lisa Cadmus-Bertram, Warren R Dunn, David R Bell
PURPOSE: Fear of reinjury is an important factor in determining who returns to sport following anterior cruciate ligament reconstruction (ACLR). Evidence from other musculoskeletal injuries indicates fear of reinjury may be related to stiffened movement patterns observed in individuals following ACLR. The relationship between fear of reinjury and performance on dynamic tasks, however, has not been investigated. Therefore, the purpose of this study was to investigate the relationship between fear of reinjury and jump-landing biomechanics...
April 26, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29698477/characteristics-of-ataxic-gait-in-familial-dysautonomia-patients
#19
Sigal Portnoy, Channa Maayan, Jeanna Tsenter, Yonah Ofran, Vladimir Goldman, Nurit Hiller, Naama Karniel, Isabella Schwartz
INTRODUCTION AND OBJECTIVES: Progressive ataxic gait is a common symptom in individuals with Familial Dysautonomia (FD). At least 50% of adults with FD require assistance with walking. Our aims were to describe the medical condition of individuals with FD (ii) compare their gait characteristics to healthy individuals, and (iii) assess correlations between gait measures, presence of unstable gait pattern and frequency of falls. METHODS: Twelve subjects with FD (7 males, age 25...
2018: PloS One
https://www.readbyqxmd.com/read/29698430/dynamic-cortical-participation-during-bilateral-cyclical-ankle-movements-effects-of-parkinson-s-disease
#20
Takashi Yoshida, Kei Masani, Karl Zabjek, Milos R Popovic, Robert Chen
Parkinson's disease (PD) is known to increase asymmetry and variability of bilateral movements. However, the mechanisms of such abnormalities are not fully understood. Here, we aimed to investigate whether kinematic abnormalities are related to cortical participation during bilateral, cyclical ankle movements, which required i) maintenance of a specific frequency and ii) bilateral coordination of the lower limbs in an anti-phasic manner. We analyzed electroencephalographic and electromyographic signals from nine men with PD and nine aged-matched healthy men while they sat and cyclically dorsi- and plantarflexed their feet...
2018: PloS One
keyword
keyword
66799
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"