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Gait & Posture

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https://www.readbyqxmd.com/read/28551469/peak-medial-but-not-lateral-hamstring-activity-is-significantly-lower-during-stance-phase-of-running-an-emg-investigation-using-a-reduced-gravity-treadmill
#1
Clint Hansen, Einar Einarson, Athol Thomson, Rodney Whiteley
The hamstrings are seen to work during late swing phase (presumably to decelerate the extending shank) then during stance phase (presumably stabilizing the knee and contributing to horizontal force production during propulsion) of running. A better understanding of this hamstring activation during running may contribute to injury prevention and performance enhancement (targeting the specific role via specific contraction mode). Twenty active adult males underwent surface EMG recordings of their medial and lateral hamstrings while running on a reduced gravity treadmill...
May 17, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28551466/stance-instability-in-preclinical-sca1-mutation-carriers-a-4-year-prospective-posturography-study
#2
Lorenzo Nanetti, Dario Alpini, Valentina Mattei, Anna Castaldo, Alessia Mongelli, Greta Brenna, Cinzia Gellera, Caterina Mariotti
OBJECTIVE: We aimed to study postural balance in preclinical Spinocerebellar ataxia type 1 (SCA1) mutation carriers to identify and observe specific motor functional deficit before evident clinical manifestation. METHODS: Participants were 9 asymptomatic SCA1 mutation carriers (6M/3F), aged 31.8±7years (range 22-44), and 17 age-matched non-carrier controls (5M/12F) (age 18-42). Subjects underwent postural tests on a force platform (Tetrax(®)-IBS, Sunlight Medical Ltd...
May 17, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28551465/spinal-fusion-limits-upper-body-range-of-motion-during-gait-without-inducing-compensatory-mechanisms-in-adolescent-idiopathic-scoliosis-patients
#3
R M Holewijn, I Kingma, M de Kleuver, J J P Schimmel, N L W Keijsers
INTRODUCTION: Previous studies show a limited alteration of gait at normal walking speed after spinal fusion surgery for adolescent idiopathic scoliosis (AIS), despite the presumed essential role of spinal mobility during gait. This study analyses how spinal fusion affects gait at more challenging walking speeds. More specifically, we investigated whether thoracic-pelvic rotations are reduced to a larger extent at higher gait speeds and whether compensatory mechanisms above and below the stiffened spine are present...
May 17, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28544950/the-influence-of-continuous-versus-interval-walking-exercise-on-knee-joint-loading-and-pain-in-patients-with-knee-osteoarthritis
#4
Shawn Farrokhi, Prakash Jayabalan, Jonathan A Gustafson, Brian A Klatt, Gwendolyn A Sowa, Sara R Piva
OBJECTIVE: To evaluate whether knee contact force and knee pain are different between continuous and interval walking exercise in patients with knee osteoarthritis (OA). METHODS: Twenty seven patients with unilateral symptomatic knee OA completed two separate walking exercise sessions on a treadmill at 1.3m/s on two different days: 1) a continuous 45min walking exercise session, and 2) three 15min bouts of walking exercise separated by 1h rest periods for a total of 45min of exercise in an interval format...
May 17, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28544949/the-influence-of-shoe-aging-on-children-running-biomechanics
#5
Alexis Herbaut, Pascale Chavet, Maxime Roux, Nils Guéguen, Franck Barbier, Emilie Simoneau-Buessinger
Athletic children are prone to overuse injuries, especially at the heel and knee. Since footwear is an extrinsic factor of lower limb injury risk, the aim of this study was to assess the influence of shoe aging on children running biomechanics. Fourteen children active in sports participated in a laboratory biomechanical evaluation. A new pair of shoes was provided to each participant at an inclusion visit. Four months later, the participants performed a running task and their kinematics and kinetics were assessed both with their used shoes and with a new pair of shoes identical to the first...
May 17, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28544947/measuring-cortical-motor-hemodynamics-during-assisted-stepping-an-fnirs-feasibility-study-of-using-a-walker
#6
Andrea Cristina de Lima-Pardini, Guilherme A Zimeo Morais, Joana Bisol Balardin, Daniel Boari Coelho, Nametala Maia Azzi, Luis Augusto Teixeira, João Ricardo Sato
Walkers are commonly prescribed worldwide to individuals unable to walk independently. Walker usage leads to improved postural control and voluntary movement during step. In the present study, we aimed to provide a concept-proof on the feasibility of an event-related protocol integrating the analyses of biomechanical variables of step initiation and functional near-infrared spectroscopy (fNIRS) to measure activation of the supplementary motor area (SMA) while using a walker. Healthy young participants were tested while stepping with versus without the use of the walker...
May 17, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28535432/water-depth-effects-on-impact-loading-kinematic-and-physiological-variables-during-water-treadmill-running
#7
Paul W Macdermid, Josh Wharton, Carina Schill, Philip W Fink
PURPOSE: The purpose of this study was to compare impact loading, kinematic and physiological responses to three different immersion depths (mid-shin, mid-thigh, and xiphoid process) while running at the same speed on a water based treadmill. METHODS: Participants (N=8) ran on a water treadmill at three depths for 3min. Tri-axial accelerometers were used to identify running dynamics plus measures associated with impact loading rates, while heart rate data were logged to indicate physiological demand...
May 17, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28551467/kinematic-strategies-for-obstacle-crossing-in-patients-with-isolated-posterior-cruciate-ligament-deficiency
#8
Mei-Ying Kuo, Shih-Wun Hong, Tsai-Hsueh Leu, Chien-Chung Kuo, Tung-Wu Lu, Jyh-Horng Wang
The posterior cruciate ligament (PCL) plays an important role in the structural stability and sensory feedback at the knee. Altered structural and proprioceptive function at the PCL-deficient knee may affect the joint motions and the end-point control during functional activities. The current study identified the effects of unilateral PCL deficiency (PCLD) on the end-point control and joint kinematics of the lower limbs during obstacle-crossing. Eighteen patients with unilateral PCLD and eighteen healthy controls were each asked to walk and cross obstacles of heights of 10%, 20% and 30% of their leg lengths, with the affected and the unaffected limb leading, while their kinematic data were measured...
May 13, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28528004/potential-contributions-of-skeletal-muscle-contractile-dysfunction-to-altered-biomechanics-in-obesity
#9
REVIEW
Lance M Bollinger
Obesity alters whole body kinematics and joint kinetics during activities of daily living which are thought to contribute to increased risk of musculoskeletal injury, development of lower extremity joint osteoarthritis (OA), and physical disability. To date, it has widely been accepted that excess adipose tissue mass is the major driver of biomechanical alterations in obesity. However, it is well established that obesity is a systemic disease affecting numerous, if not all, organ systems of the body. Indeed, obesity elicits numerous adaptations within skeletal muscle, including alterations in muscle structure (ex...
May 13, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28544948/defining-instances-and-limbs-during-performance-of-the-standing-turn
#10
Tina Smith, Siobhán Strike
Conventions have been reported to describe walking and turning gait. No such descriptions appear for the 180° standing turn and as such there are inconsistencies in the literature reporting on this movement. The complexity of explaining the standing turning motion, variation in number of steps when turning, and differing strategies used means conventions will make research reporting easier to comprehend and less likely for errors in interpretation. We propose definitions of the 180° standing turning motion and steps used to complete a turn for able-bodied and pathological populations to encourage consistency in reporting...
May 12, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28544951/clinical-balance-scales-indicate-worse-postural-control-in-people-with-parkinson-s-disease-who-exhibit-freezing-of-gait-compared-to-those-who-do-not-a-meta-analysis
#11
REVIEW
Esther M J Bekkers, Bauke W Dijkstra, Kim Dockx, Elke Heremans, Sabine M P Verschueren, Alice Nieuwboer
Postural instability and freezing of gait (FOG) are key features of Parkinson's disease (PD) that are closely related to falls. Uncovering the postural control differences between individuals with and without FOG contributes to our understanding of the relationship between these phenomena. The objective of this meta-analysis was to investigate whether postural control deficits, as detected by clinical balance scales, were more apparent in FOG+ compared to FOG-. Furthermore, we aimed to identify whether different scales were equally sensitive to detect postural control deficits and whether medication affected postural control differentially in each subgroup...
May 11, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28521148/dual-task-interference-on-postural-sway-postural-transitions-and-gait-in-people-with-parkinson-s-disease-and-freezing-of-gait
#12
Ana Claudia de Souza Fortaleza, Martina Mancini, Patty Carlson-Kuhta, Laurie A King, John G Nutt, Eliane Ferrari Chagas, Ismael Forte Freitas, Fay B Horak
Freezing of gait (FoG) is associated with less automatic gait and more impaired cognition, balance and postural transitions compared to people with PD who do not have FoG. However, it is unknown whether dual-task cost during postural sway, postural transitions (such as gait initiation and turning), and gait are more in subjects with Parkinson's disease (PD) who have freezing of gait (FoG+) compared to those who do not have FoG (FoG-). Here, we hypothesized that the effects of a cognitive dual task on postural sway, postural transitions and gait would be larger in FoG+ than FoG-...
May 10, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28527386/gait-patterns-of-children-and-adolescents-with-charcot-marie-tooth-disease
#13
Elizabeth Wojciechowski, Amy Sman, Kayla Cornett, Jacqueline Raymond, Kathryn Refshauge, Manoj P Menezes, Joshua Burns
Gait abnormalities reported in childhood Charcot-Marie-Tooth disease (CMT) include foot-drop, reduced ankle power at push-off and increased knee and hip flexion for swing clearance ('steppage-gait'). The purpose of this study was to describe the gait patterns of 60 children aged 6-17 years with CMT (CMTall) and distinguish differences based on functional weakness using the CMT Pediatric Scale (CMTPedS). Data were captured using Vicon Nexus system and compared to 50 healthy norms. Data were subdivided into three groups denoting increasing severity of dorsiflexion and plantarflexion weakness from the CMTPedS: no difficulty heel or toe walking (CMTND), difficulty heel walking (CMTDH), difficulty toe and heel walking (CMTDTH)...
May 8, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28528005/attentional-load-of-walking-in-children-aged-7-12-and-in-adults
#14
Guillaume Chauvel, Estelle Palluel, Arthur Brandao, Guillaume Barbieri, Vincent Nougier, Isabelle Olivier
The amount of attentional resources necessary to walk in children, and how they evolve during childhood remains unclear. This study examined children's gait parameters in different dual-task conditions. 53 children, divided into two age groups (7-9 and 10-12 years old), and 18 adults walked on a mat in three different cognitive conditions: watching a video (video condition), listening its soundtrack (audio condition), and without any additional task (control condition). Questions were asked at the end of the video and audio conditions to make sure that participants were paying attention to the stimuli...
May 6, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28551468/effects-of-different-movement-modes-on-plantar-pressure-distribution-patterns-in-obese-and-non-obese-chinese-children
#15
Yan Song-Hua, Wang Lu, Zhang Kuan
Walking, slow running (jogging) and fast running often occur in daily life, Physical Education Class and Physical Fitness Test for children. However, potential impact of jogging and running on plantar pressure of children is not clear. The purpose of this study was to compare the characteristics of plantar pressure distribution patterns in obese and non-obese children during walking, jogging and running, and evaluate biomechanical effects of three movements on obese children. A 2-m footscan plantar pressure plate (RSscan International, Belgium) was used to collect the gait data of 20 obese children (10...
May 4, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28544952/influence-of-both-cutaneous-input-from-the-foot-soles-and-visual-information-on-the-control-of-postural-stability-in-dyslexic-children
#16
Nathalie Goulème, Philippe Villeneuve, Christophe-Loïc Gérard, Maria Pia Bucci
Dyslexic children show impaired in postural stability. The aim of our study was to test the influence of foot soles and visual information on the postural control of dyslexic children, compared to non-dyslexic children. Postural stability was evaluated with TechnoConcept(®) platform in twenty-four dyslexic children (mean age: 9.3±0.29years) and in twenty-four non-dyslexic children, gender- and age-matched, in two postural conditions (with and without foam: a 4-mm foam was put under their feet or not) and in two visual conditions (eyes open and eyes closed)...
May 4, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28505545/leg-stiffness-during-sprinting-in-transfemoral-amputees-with-running-specific-prosthesis
#17
Yoko Sano, Atsushi Makimoto, Satoru Hashizume, Akihiko Murai, Yoshiyuki Kobayashi, Hiroshi Takemura, Hiroaki Hobara
Carbon fiber running-specific prostheses are designed to reproduce the spring-like stepping behavior of individuals similar to springs loaded by the entire body mass (i.e. spring-mass model). The aim of this study was to test whether leg stiffness would be modulated differently between intact and prosthetic legs in transfemoral amputees wearing RSP during sprinting. Eight unilateral transfemoral amputees performed maximum sprinting along an indoor overground runway. Leg stiffness was calculated from kinetic and kinematic data in intact and prosthetic legs...
May 4, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28501023/force-velocity-relationship-of-leg-muscles-assessed-with-motorized-treadmill-tests-two-velocity-method
#18
Slobodanka Dobrijevic, Vladimir Ilic, Sasa Djuric, Slobodan Jaric
Linear regression models applied on force (F) and velocity (V) data obtained from loaded multi-joint functional movement tasks have often been used to assess mechanical capacities of the tested muscles. The present study aimed to explore the properties of the F-V relationship of leg muscles exerting the maximum pulling F at a wide range of V on a standard motorized treadmill. Young and physically active male and female subjects (N=13+15) were tested on their maximum pulling F exerted horizontally while walking or running on a treadmill set to 8 different velocities (1...
May 4, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28505546/quantifying-sources-of-variability-in-gait-analysis
#19
Kohleth Chia, Morgan Sangeux
Measurements from gait analysis are affected by many sources of variability. Schwartz et al. [1] illustrated an experimental design and methods to estimate these variance components. However, the derivation contains errors which could severely bias the estimation of some components. Therefore, in this paper, we presented correction to this method using ANOVA and Likelihood methods. Furthermore, we demonstrated how commonly used reliability indices like CMC and ICC may be derived from the variance components...
May 3, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28482200/analysis-of-compensatory-mechanisms-in-the-pelvis-and-lower-extremities-in-patients-with-pelvic-incidence-and-lumbar-lordosis-mismatch
#20
Xiaofei Cheng, Kai Zhang, Xiaojiang Sun, Changqing Zhao, Hua Li, Jie Zhao
The objective was to analyze the compensatory effect of the pelvis and lower extremities on sagittal spinal malalignment in patients with pelvic incidence (PI) and lumbar lordosis (LL) mismatch. A series of parameters including PI, LL, PI-LL, thoracic kyphosis (TK), pelvic tilt (PT), sacral slope (SS), knee flexion angle (KFA), tibial obliquity angle (TOA), femoral obliquity angle (FOA), femur pelvis angle (FPA) and pelvic shift (PS) were measured. Patients with PI-LL mismatch were divided into pelvic retroversion group and pelvic retroposition group based on their PT and PS, and then the parameters were compared within the two groups and with the control group...
May 1, 2017: Gait & Posture
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