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Lower limb kinematics

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https://www.readbyqxmd.com/read/28073084/reliability-and-minimum-detectable-change-of-the-gait-deviation-index-gdi-in-post-stroke-patients
#1
Katren Pedroso Correa, Gisele Francini Devetak, Suzane Ketlyn Martello, Juliana Carla de Almeida, Ana Carolina Pauleto, Elisangela Ferretti Manffra
The Gait Deviation Index (GDI) is a summary measure that provides a global picture of gait kinematic data. Since the ability to walk is critical for post-stroke patients, the aim of this study was to determine the reliability and Minimum Detectable Change (MDC) of the GDI in this patient population. Twenty post-stroke patients (11 males, 9 females; mean age, 55.2±9.9years) participated in this study. Patients presented with either right- (n=14) or left-sided (n=6) hemiparesis. Kinematic gait data were collected in two sessions (test and retest) that were 2 to 7days apart...
December 23, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28065472/adaptive-changes-in-running-kinematics-as-a-function-of-head-stability-demands-and-their-effect-on-shock-transmission
#2
Jongil Lim, Michael A Busa, Richard E A van Emmerik, Joseph Hamill
This study aimed to identify adaptive changes in running kinematics and impact shock transmission as a function of head stability requirements. Fifteen strides from twelve recreational runners were collected during preferred speed treadmill running. Head stability demands were manipulated through real-time visual feedback that required head-gaze orientation to maintain within boxes of different sizes, ranging from 21° to 3° of visual angle with 3° decrements. The main outcome measures were tibial and head peak accelerations in the time and frequency domains (impact and active phases), shock transmission from tibia to head, stride parameters, and sagittal plane joint kinematics...
December 29, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/28062120/robotic-simulation-of-identical-athletic-task-kinematics-on-cadaveric-limbs-exhibits-a-lack-of-differences-in-knee-mechanics-between-contralateral-pairs
#3
Nathaniel A Bates, April L McPhearson, Rebecca J Nesbitt, Jason T Shearn, Gregory D Myer, Timothy E Hewett
Limb asymmetry is a known factor for increased ACL injury risk. These asymmetries are normally observed during in vivo testing. Prior studies have developed in vitro testing methodologies driven by in vivo kinematics to investigate knee mechanics relative to ACL injury. The objective of this study was to determine if mechanical side-to-side asymmetries persist in contralateral pairs during in vitro simulation testing. In vivo kinematics were recorded for male and female drop vertical jump and sidestep cutting tasks...
December 29, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/28052440/positive-outcomes-following-gait-therapy-intervention-for-hip-osteoarthritis-a-longitudinal-study
#4
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/28018193/are-modular-activations-altered-in-lower-limb-muscles-of-persons-with-multiple-sclerosis-during-walking-evidence-from-muscle-synergies-and-biomechanical-analysis
#5
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/28009799/percutaneous-hamstring-lengthening-surgery-is-as-effective-as-open-lengthening-in-children-with-cerebral-palsy
#6
Alexander Nazareth, Susan Rethlefsen, Ted C Sousa, Nicole M Mueske, Tishya A L Wren, Robert M Kay
BACKGROUND: Surgical lengthening of the hamstrings is often performed to correct crouch gait in children with cerebral palsy (CP). Previous studies have demonstrated the effectiveness of open hamstring lengthening (oHSL) in improving knee extension static and dynamic range of motion; however, literature regarding percutaneous hamstring lengthening (pHSL) is limited. The purpose of this study was to investigate the effect of open versus pHSL for improving crouch gait and knee function in children with CP...
December 22, 2016: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/27992250/impact-of-a-long-run-on-injury-related-biomechanics-with-relation-to-weekly-mileage-in-trained-male-runners
#7
Max R Paquette, Daniel A Melcher
The purposes of this study were to compare selected biomechanical variables before and after a long run, and to assess the relationship between weekly running volume and changes in lower limb biomechanics after the run. Twelve trained habitual rearfoot strike male runners ran overground before and after a treadmill long run while kinematic and kinetic data were recorded. Repeated measures analysis of variance and Cohen's d effect sizes were used to compare kinematic and kinetic variables before and after the run...
December 19, 2016: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/27983626/design-and-optimization-of-a-hybrid-driven-waist-rehabilitation-robot
#8
Bin Zi, Guangcai Yin, Dan Zhang
In this paper a waist rehabilitation robot driven by cables and pneumatic artificial muscles (PAMs) has been conceptualized and designed. In the process of mechanism design, the human body structure, the waist movement characteristics, and the actuators' driving characteristics are the main considerable factors to make the hybrid-driven waist rehabilitation robot (HWRR) cost-effective, safe, flexible, and well-adapted. A variety of sensors are chosen to measure the position and orientation of the recovery patient to ensure patient safety at the same time as the structure design...
December 14, 2016: Sensors
https://www.readbyqxmd.com/read/27978501/balancing-sensory-inputs-sensory-reweighting-of-ankle-proprioception-and-vision-during-a-bipedal-posture-task
#9
Rakshatha Kabbaligere, Beom-Chan Lee, Charles S Layne
During multisensory integration, it has been proposed that the central nervous system (CNS) assigns a weight to each sensory input through a process called sensory reweighting. The outcome of this integration process is a single percept that is used to control posture. The main objective of this study was to determine the interaction between ankle proprioception and vision during sensory integration when the two inputs provide conflicting sensory information pertaining to direction of body sway. Sensory conflict was created by using bilateral Achilles tendon vibration and contracting visual flow and produced body sway in opposing directions when applied independently...
December 7, 2016: Gait & Posture
https://www.readbyqxmd.com/read/27959816/a-real-time-gait-event-detection-for-lower-limb-prosthesis-control-and-evaluation
#10
Hafiz Farhan Maqbool, Muhammad Afif Bin Husman, Mohammed I Awad, Alireza Abouhossein, Nadeem Iqbal, Abbas A Dehghani-Sanij
Lower extremity amputees suffer from mobility limitations which will result in a degradation of their quality of life. Wearable sensors are frequently used to assess spatio-temporal, kinematic and kinetic parameters providing the means to establish an interactive control of the amputee-prosthesis-environment system. Gait events and the gait phase detection of an amputee's locomotion are vital for controlling lower limb prosthetic devices. The paper presents an approach to real-time gait event detection for lower limb amputees using a wireless gyroscope attached to the shank when performing level ground and ramp activities...
December 7, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/27918704/comparison-of-3d-joint-angles-measured-with-the-kinect-2-0-skeletal-tracker-versus-a-marker-based-motion-capture-system
#11
Trent M Guess, Swithin Razu, Amirhossein Jahandar, Marjorie Skubic, Zhiyu Huo
The Microsoft Kinect is becoming a widely used tool for inexpensive, portable measurement of human motion with the potential to support clinical assessments of performance and function. In this study, the relative osteokinematic Cardan joint angles of the hip and knee were calculated using the Kinect 2.0 skeletal tracker. The pelvis segments of the default skeletal model were reoriented and three-dimensional joint angles were compared to a marker-based system during a drop vertical jump and a hip abduction motion...
December 5, 2016: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/27912747/the-three-dimensional-kinematics-and-spatiotemporal-parameters-of-gait-in-6-10-year-old-typically-developed-children-in-the-cape-metropole-of-south-africa-a-pilot-study
#12
Yvonne Smith, Quinette Louw, Yolandi Brink
BACKGROUND: Functional gait is an integral part of life, allowing individuals to function within their environment and participate in activities of daily living. Gait assessment forms an essential part of a physical examination and can help screen for physical impairments. No three-dimensional (3D) gait analysis studies of children have been conducted in South Africa. South African gait analysis laboratory protocols and procedures may differ from laboratories in other countries, therefore a South African data base of normative values is required to make a valid assessment of South African children's gait...
December 3, 2016: BMC Pediatrics
https://www.readbyqxmd.com/read/27912154/limb-dominance-foot-orientation-and-functional-asymmetry-during-walking-gait
#13
John D Polk, Rebecca M Stumpf, Karl S Rosengren
While healthy gait is often characterized as, or assumed to be symmetric, consistent asymmetries often exist. In this study, we test the hypotheses that asymmetries in lower limb function, as measured by ground reaction force characteristics, may be explained by differences in foot orientation or limb dominance. Peak ground reaction force (GRF) measurements, and impulses were obtained for thirty-six healthy subjects with simultaneous kinematic estimates of foot posture. Three gait tasks were performed: subjects walked i) with normal foot orientation, ii) with feet laterally rotated (outward), and iii) with feet aligned in the direction of movement (straight)...
November 18, 2016: Gait & Posture
https://www.readbyqxmd.com/read/27888696/underwater-gait-analysis-in-parkinson-s-disease
#14
Daniele Volpe, Davide Pavan, Meg Morris, Annamaria Guiotto, Robert Iansek, Sofia Fortuna, Giuseppe Frazzitta, Zimi Sawacha
Although hydrotherapy is one of the physical therapies adopted to optimize gait rehabilitation in people with Parkinson disease, the quantitative measurement of gait-related outcomes has not been provided yet. This work aims to document the gait improvements in a group of parkinsonians after a hydrotherapy program through 2D and 3D underwater and on land gait analysis. Thirty-four parkinsonians and twenty-two controls were enrolled, divided into two different cohorts. In the first one, 2 groups of patients underwent underwater or land based walking training; controls underwent underwater walking training...
November 10, 2016: Gait & Posture
https://www.readbyqxmd.com/read/27884055/the-association-of-forefoot-varus-deformity-with-patellofemoral-cartilage-damage-in-older-adult-cadavers
#15
Rebecca S Lufler, Joshua J Stefanik, Jingbo Niu, F Kip Sawyer, Todd M Hoagland, K Douglas Gross
INTRODUCTION: Forefoot alignment may contribute to patellofemoral joint (PFJ) osteoarthritis (OA) via its influence on the closed chain kinematics of the lower limb. The purpose of this cadaveric study was to investigate the relationship between forefoot varus and ipsilateral cartilage damage in the medial and lateral PFJ. MATERIALS AND METHODS: Forefoot alignment measurements were obtained from the feet of 25 cadavers (n=50). Cartilage damage in the medial and lateral PFJ of each knee was scored using the Outerbridge scale...
November 24, 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27875927/what-is-being-trained-how-divergent-forms-of-plasticity-compete-to-shape-locomotor-recovery-after-spinal-cord-injury
#16
J Russell Huie, Kazuhito Morioka, Jenny Haefeli, Adam R Ferguson
Spinal cord injury (SCI) is a devastating syndrome that produces dysfunction in motor and sensory systems, manifesting as chronic paralysis, sensory changes, and pain disorders. The multi-faceted and heterogeneous nature of SCI has made effective rehabilitative strategies challenging. Work over the last 40 years has aimed to overcome these obstacles by harnessing the intrinsic plasticity of the spinal cord to improve functional locomotor recovery. Intensive training after SCI facilitates lower extremity function and has shown promise as a tool for retraining the spinal cord by engaging innate locomotor circuitry in the lumbar cord...
January 13, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/27871019/comparison-of-lower-limb-and-trunk-kinematics-between-markerless-and-marker-based-motion-capture-systems
#17
Margaret A Perrott, Tania Pizzari, Jill Cook, Jodie A McClelland
: Three dimensional (3-D) motion capture systems are used by researchers and clinicians to analyze the kinematics of human movement. Traditional marker based systems are time consuming and limit the size of studies. Markerless 3-D systems are quicker to use but the differences between data captured in each system is unclear. AIM: To examine the relationship of kinematic data captured by marker based and markerless motion capture systems. METHODS: Movement was assessed in two tests: a simple knee flexion test and single leg squat with a marker based protocol (Vicon) and a markerless protocol (Organic Motion)...
October 31, 2016: Gait & Posture
https://www.readbyqxmd.com/read/27871017/predicting-postoperative-gait-in-cerebral-palsy
#18
Omar A Galarraga C, Vincent Vigneron, Bernadette Dorizzi, Néjib Khouri, Eric Desailly
In this work, postoperative lower limb kinematics are predicted with respect to preoperative kinematics, physical examination and surgery data. Data of 115 children with cerebral palsy that have undergone single-event multilevel surgery were considered. Preoperative data dimension was reduced utilizing principal component analysis. Then, multiple linear regressions with 80% confidence intervals were performed between postoperative kinematics and bilateral preoperative kinematics, 36 physical examination variables and combinations of 9 different surgical procedures...
November 9, 2016: Gait & Posture
https://www.readbyqxmd.com/read/27865154/a-narrow-bimalleolar-width-is-a-risk-factor-for-ankle-inversion-injury-in-male-military-recruits-a-prospective-study
#19
Hannah Rice, Michael Nunns, Carol House, Joanne Fallowfield, Adrian Allsopp, Sharon Dixon
BACKGROUND: Ankle inversion injuries are one of the most common and burdensome injuries in athletic populations. Research that prospectively identifies characteristics associated with this injury is lacking. This prospective study compared baseline anthropometric and biomechanical gait characteristics of military recruits who sustained an ankle inversion injury during training, with those who remained injury-free. METHODS: Bilateral plantar pressure and three-dimensional lower limb kinematics were recorded in 1065 male, injury-free military recruits, during barefoot running...
November 10, 2016: Clinical Biomechanics
https://www.readbyqxmd.com/read/27865130/effects-of-fatigue-on-lower-limb-pelvis-and-trunk-kinematics-and-muscle-activation-gender-differences
#20
Giovanna Camparis Lessi, Ana Flávia Dos Santos, Luis Fylipe Batista, Gabriela Clemente de Oliveira, Fábio Viadanna Serrão
BACKGROUND: Muscle fatigue is associated with biomechanical changes that may lead to anterior cruciate ligament (ACL) injuries. Alterations in trunk and pelvis kinematics may also be involved in ACL injury. Although some studies have compared the effects of muscle fatigue on lower limb kinematics between men and women, little is known about its effects on pelvis and trunk kinematics. The aim of the study was to compare the effects of fatigue on lower limb, pelvis and trunk kinematics and muscle activation between men and women during landing...
November 9, 2016: Journal of Electromyography and Kinesiology
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