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Lower limb kinematics

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https://www.readbyqxmd.com/read/28918356/what-is-the-price-for-the-duchenne-gait-pattern-in-patients-with-cerebral-palsy
#1
Firooz Salami, Mirjam Niklasch, Britta K Krautwurst, Thomas Dreher, Sebastian I Wolf
Duchenne gait is characterized by trunk lean towards the affected stance limb with the pelvis stable or elevated on the swinging limb side during single limb stance phase. We assessed the relationship between hip abduction moments and trunk kinetics in patients with cerebral palsy showing excessive lateral trunk motion. Data of 18 subjects with bilateral spastic cerebral palsy (CP) and 20 aged matched typically developing subjects (TD) were collected retrospectively. Criteria for patient selection were barefoot walking without aid presenting with excessive lateral trunk motion...
September 7, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28910654/kinect-based-assessment-of-lower-limb-kinematics-and-dynamic-postural-control-during-the-star-excursion-balance-test
#2
Moataz Eltoukhy, Christopher Kuenze, Jeonghoon Oh, Savannah Wooten, Joseph Signorile
Assessments using dynamic postural control tests, like the Star Excursion Balance Test (SEBT), in combination with three-dimensional (3D) motion analysis can yield critical information regarding a subject's lower limb movement patterns. 3D analysis can provide a clear understanding of the mechanisms that lead to specific outcome measures on the SEBT. Currently, the only technology for 3D motion analysis during such tests is expensive marker-based motion analysis systems, which are impractical for use in clinical settings...
September 9, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28900572/return-to-running-following-a-knee-disarticulation-amputation-a-case-report
#3
Angela R Diebal-Lee, Robert S Kuenzi, Christopher A Rábago
BACKGROUND AND PURPOSE: The evolution of running-specific prostheses has empowered athletes with lower extremity amputations to run farther and faster than previously thought possible; but running with proper mechanics is still paramount to an injury-free, active lifestyle. The purpose of this case report was to describe the successful alteration of intact limb mechanics from a Rearfoot Striking (RFS) to a Non-Rearfoot Striking (NRFS) pattern in an individual with a knee disarticulation amputation, the associated reduction in Average Vertical Loading Rate (AVLR), and the improvement in functional performance following the intervention...
August 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28892671/kinematic-and-kinetic-gait-deviations-in-males-long-after-anterior-cruciate-ligament-reconstruction
#4
Giovanni Milandri, Mike Posthumus, T J Small, Adam Bothma, Willem van der Merwe, Reshma Kassanjee, Sudesh Sivarasu
BACKGROUND: Biomechanical deviations long (approx. 5years) after anterior cruciate ligament reconstruction have not been quantified in males, despite their distinct risk profile as compared to females. These deviations can indicate altered joint loading during chronic, repetitive motions. METHODS: Cross-sectional study, comparing kinematic and kinetic variables between 15 male anterior cruciate ligament reconstructed patients and 15 healthy controls. During walking and running gait, measurements were taken of impact dynamics, knee and hip sagittal plane angles and moments, and knee varus angles and adduction moments...
July 29, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28888109/biomechanical-compensations-of-the-trunk-and-lower-extremities-during-stepping-tasks-after-unilateral-transtibial-amputation
#5
Amanda M Murray, Brecca M Gaffney, Bradley S Davidson, Cory L Christiansen
BACKGROUND: Lower extremity movement compensations following transtibial amputation are well-documented and are likely influenced by trunk posture and movement. However, the biomechanical compensations of the trunk and lower extremities, especially during high-demand tasks such as step ascent and descent, remain unclear. METHODS: Kinematic and kinetic data were collected during step ascent and descent tasks for three groups of individuals: diabetic/transtibial amputation, diabetic, and healthy...
August 30, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28886079/associations-between-lower-limb-muscle-activation-and-knee-flexion-in-post-stroke-individuals-a-study-on-the-stance-to-swing-phases-of-gait
#6
Wei Wang, Ke Li, Shouwei Yue, Cuiping Yin, Na Wei
Reduced knee flexion is a leading feature of post-stroke gait, but the causes have not been well understood. The purpose of this study was to investigate the relationship between the knee flexion and the lower-limb muscle activation within the stance-to-swing phases of gait cycle in the post-stroke hemiplegic patients. Ten stroke patients and 10 age- and gender-matched healthy subjects participated in the experiment. The lower-limb kinematic signals and the surface electromyography (sEMG) signals of the left and right rectus femoris (RF), biceps femoris (BF) and lateral gastrocnemius (GS) were recorded during walking...
2017: PloS One
https://www.readbyqxmd.com/read/28885155/a-nonlinear-dynamics-based-estimator-for-functional-electrical-stimulation-preliminary-results-from-lower-leg-extension-experiments
#7
Marcus Allen, Qiang Zhong, Nicholas Kirsch, Ashwin Dani, William W Clark, Nitin Sharma
Miniature inertial measurement units (IMUs) are wearable sensors that measure limb segment or joint angles during dynamic movements. However, IMUs are generally prone to drift, external magnetic interference, and measurement noise. This paper presents a new class of nonlinear state estimation technique called state-dependent coefficient (SDC) estimation to accurately predict joint angles from IMU measurements. The SDC estimation method uses limb dynamics, instead of limb kinematics, to estimate the limb state...
September 7, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28882330/combining-muscle-synergies-and-biomechanical-analysis-to-assess-gait-in-stroke-patients
#8
Filipe O Barroso, Diego Torricelli, Francisco Molina-Rueda, Isabel M Alguacil-Diego, Roberto Cano-de-la-Cuerda, Cristina Santos, Juan C Moreno, Juan C Miangolarra-Page, José L Pons
The understanding of biomechanical deficits and impaired neural control of gait after stroke is crucial to prescribe effective customized treatments aimed at improving walking function. Instrumented gait analysis has been increasingly integrated into the clinical practice to enhance precision and inter-rater reliability for the assessment of pathological gait. On the other hand, the analysis of muscle synergies has gained relevance as a novel tool to describe the neural control of walking. Since muscle synergies and gait analysis capture different but equally important aspects of walking, we hypothesized that their combination can improve the current clinical tools for the assessment of walking performance...
August 20, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28869436/design-and-analysis-of-a-novel-fall-prevention-device-for-lower-limbs-rehabilitation-robot
#9
Jiancheng Ji, Shuai Guo, Tao Song, Fengfeng Jeff Xi
BACKGROUND: Most stroke survivors are suffering from physical motor impairments and confronting with the risk of falls, and well trunk stability is essential for balance during daily functional activities. OBJECTIVES: Current fall prevention devices have various limits to the efficient recovery of balance function of the trunk. To provide hemiplegic patients after stroke with the retraining of trunk position sense and a safety environment, a novel fall prevention device is proposed...
August 21, 2017: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/28861038/alleviation-of-motor-impairments-in-patients-with-cerebral-palsy-acute-effects-of-whole-body-vibration-on-stretch-reflex-response-voluntary-muscle-activation-and-mobility
#10
Anne Krause, Eckhard Schönau, Albert Gollhofer, Ibrahim Duran, Anja Ferrari-Malik, Kathrin Freyler, Ramona Ritzmann
INTRODUCTION: Individuals suffering from cerebral palsy (CP) often have involuntary, reflex-evoked muscle activity resulting in spastic hyperreflexia. Whole-body vibration (WBV) has been demonstrated to reduce reflex activity in healthy subjects, but evidence in CP patients is still limited. Therefore, this study aimed to establish the acute neuromuscular and kinematic effects of WBV in subjects with spastic CP. METHODS: 44 children with spastic CP were tested on neuromuscular activation and kinematics before and immediately after a 1-min bout of WBV (16-25 Hz, 1...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28859603/effects-of-constraint-induced-movement-therapy-for-lower-limbs-on-measurements-of-functional-mobility-and-postural-balance-in-subjects-with-stroke-a-randomized-controlled-trial
#11
Emília Márcia Gomes de Souza E Silva, Tatiana Souza Ribeiro, Tállyta Camyla Chaves da Silva, Mayara Fabiana Pereira Costa, Fabrícia Azevedo da Costa Cavalcanti, Ana Raquel Rodrigues Lindquist
Abstrato Background: Constraint-induced movement therapy (CIMT) is suggested to reduce functional asymmetry between the upper limbs after stroke. However, there are few studies about CIMT for lower limbs. OBJECTIVE: To examine the effects of CIMT for lower limbs on functional mobility and postural balance in subjects with stroke. METHODS: A 40-day follow-up, single-blind randomized controlled trial was performed with 38 subacute stroke patients (mean of 4.5 months post-stroke)...
August 31, 2017: Topics in Stroke Rehabilitation
https://www.readbyqxmd.com/read/28858688/skill-level-constrains-the-coordination-of-posture-and-upper-limb-movement-in-a-pistol-aiming-task
#12
Ji Hynu Ko, Dong Wook Han, Karl M Newell
The purpose of the experiment was to investigate whether skill level differentially organizes the coordination of the postural system and upper limb kinematics in a pistol-aiming task. Participants aimed an air-pistol at a target center in 30s trials as accurately as possible while standing on a force platform with shooting arm joint kinematics recorded. The novice group had greater motion of the pistol end point, arm joints and the center of pressure than the skilled group. Principal components analysis (PCA) showed that the skilled group required 2 components as opposed to the 3 components of the novice group to accommodate the variance...
August 28, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28844565/within-between-session-reliability-and-agreement-of-lumbopelvic-kinematics-in-the-sagittal-plane-during-functional-movement-control-tasks-in-healthy-persons
#13
Thomas Matheve, Liesbet De Baets, Fabian Rast, Christoph Bauer, Annick Timmermans
A lack of adequate lumbopelvic movement control has been suggested as an underlying mechanism contributing to the development and persistence of low back pain and lower limb pathologies. The purpose of this study was to assess the within and between session reliability (i.e. the ability to discriminate between subjects), and the agreement (i.e. whether scores are identical on repeated measures) of lumbopelvic kinematics in the sagittal plane during functional movement control tasks. Kinematics were measured with a portable inertial measurement unit system...
August 24, 2017: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/28842793/knee-function-after-limb-salvage-surgery-for-malignant-bone-tumor-comparison-of-megaprosthesis-and-distal-femur-allograft-with-epiphysis-sparing
#14
Sébastien Pesenti, Emilie Peltier, Vincent Pomero, Guillaume Authier, Lionel Roscigni, Elke Viehweger, Jean-Luc Jouve
PURPOSE: Limb salvage surgery is increasingly used for the treatment of distal femur bone sarcomas. Total knee replacement using megaprosthesis and epiphysis-sparing biologic reconstruction using an allograft are widely used in order to preserve joint motion. We aimed to compare the results of these procedures using gait analysis in patients undergoing limb salvage surgery. METHODS: Fifteen patients were included, nine undergoing allograft with epiphysis sparing (Allograft group) and six undergoing megaprosthesis (Megaprosthesis group)...
August 26, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28841670/a-biomechanical-analysis-of-the-roundhouse-kicking-technique-of-expert-practitioners-a-comparison-between-the-martial-arts-disciplines-of-muay-thai-karate-and-taekwondo
#15
Colin J Gavagan, Mark G L Sayers
The purpose of this study was first, to determine whether there were differences in the roundhouse kicking leg kinematics performed by highly skilled Muay Thai, Karate and Taekwondo practitioners (n = 8 per group). Next, analysis aimed to identify the kinematic determinants of effective roundhouse kicking performance. Three-dimensional (3D) lower limb kinematics were recorded using a nine camera infra-red motion capture system (500 Hz) during three maximal roundhouse kicks. Impact forces were recorded using a strain gauge (1000 Hz) attached to a kicking pad positioned at the height of each participant's mastoid process...
2017: PloS One
https://www.readbyqxmd.com/read/28841508/adding-motor-control-training-to-muscle-strengthening-did-not-substantially-improve-the-effects-on-clinical-or-kinematic-outcomes-in-women-with-patellofemoral-pain-a-randomised-controlled-trial
#16
Nayra Deise Dos Anjos Rabelo, Leonardo Oliveira Pena Costa, Bruna Maria de Lima, Amir Curcio Dos Reis, André Serra Bley, Thiago Yukio Fukuda, Paulo Roberto Garcia Lucareli
DESIGN: Randomized controlled trial. BACKGROUND: Patients with Patellofemoral pain (PFP) usually present muscular weakness, pain and impaired motor control. Muscle strengthening is an effective treatment strategy for PFP, but the additional benefits of movement control training remain unknown. Therefore, the aim of this study was to compare the effects of movement control training associated with muscle strengthening, with a conventional program of strengthening alone in women with PFP...
August 18, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28837918/biomechanical-analysis-of-gait-waveform-data-exploring-differences-between-shod-and-barefoot-running-in-habitually-shod-runners
#17
Nicholas Tam, Danielle Prins, Nikhil V Divekar, Robert P Lamberts
The aim of this study was to utilise one-dimensional statistical parametric mapping to compare differences between biomechanical and electromyographical waveforms in runners when running in barefoot or shod conditions. Fifty habitually shod runners were assessed during overground running at their current 10-km race running speed. Electromyography, kinematics and ground reaction forces were collected during these running trials. Joint kinetics were calculated using inverse dynamics. One-dimensional statistical parametric mapping one sample t-test was conducted to assess differences over an entire gait cycle on the variables of interest when barefoot or shod (p<0...
August 18, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28820857/kinematic-and-neuromuscular-measures-of-intensity-during-plyometric-jumps
#18
David Cristóbal Andrade, Oscar Manzo, Ana Rosa Beltrán, Cristian Álvarez, Rodrigo Del Rio, Camilo Toledo, Jason Moran, Rodrigo Ramirez-Campillo
The aim of this study was to assess jumping performance and neuromuscular activity in lower limb muscles after drop jumps (DJ) from different drop heights (intensity) and during continuous jumping (fatigue), using markers such as reactive strength, jump height, mechanical power and surface electromyography (sEMG). The eccentric (EC) and concentric (CON) sEMG from the medial gastrocnemius (MG), biceps femoris (BF) and rectus (R) muscles were assessed during all tests. In a cross-sectional, randomized study, eleven volleyball players (age 24...
August 15, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28816618/ground-reaction-forces-produced-by-two-different-hockey-skating-arm-swing-techniques
#19
Julie Hayward-Ellis, Marion J L Alexander, Cheryl M Glazebrook, Jeff Leiter
The arm swing in hockey skating can have a positive effect on the forces produced by each skate, and the resulting velocity from each push off. The main purpose of this study was to measure the differences in ground reaction forces (GRFs) produced from an anteroposterior versus a mediolateral style hockey skating arm swing. Twenty-four elite-level female hockey players performed each technique while standing on a ground-mounted force platform, and all trials were filmed using two video cameras. Force data was assessed for peak scaled GRFs in the frontal and sagittal planes, and resultant GRF magnitude and direction...
August 17, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28814000/preliminary-study-of-a-robotic-foot-ankle-prosthesis-with-active-alignment
#20
Andrew K LaPre, Ryan D Wedge, Brian R Umberger, Frank C Sup
Robotic prosthetic foot-ankle prostheses typically aim to replace the lost joint with revolute joints aimed at replicating normal joint biomechanics. In this paper, a previously developed robotic ankle prosthesis with active alignment is evaluated. It uses a four-bar mechanism to inject positive power into the gait cycle while altering the kinematics of the ankle joint and pylon segment to reduce loading on the residual limb. In a single-subject biomechanics analysis, there was a 10% reduction in peak limb pressures and evidence of greater gait symmetry in ground reaction forces when active alignment was implemented compared to walking with the daily use prosthesis...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
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