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local dynamic stability gait

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https://www.readbyqxmd.com/read/29202661/effects-of-backpack-load-and-positioning-on-nonlinear-gait-features-in-young-adults
#1
Fábio Barbosa Rodrigues, Rina Márcia Magnani, Georgia Cristina Lehnen, Gustavo Souto de Sá E Souza, Adriano O Andrade, Marcus Fraga Vieira
Overloaded backpacks can cause changes in posture and gait dynamic balance. Therefore, the aim of this study was to assess gait regularity and local dynamic stability in young adults as they carried a backpack in different positions, and with different loads. Twenty-one healthy young adults participated in the study, carrying a backpack that was loaded with 10% and 20% of their body weight (BW). The participants walked on a level treadmill at their preferred walking speeds for 4 min under different conditions of backpack load and position (i...
December 5, 2017: Ergonomics
https://www.readbyqxmd.com/read/29100597/determinants-of-gait-stability-while-walking-on-a-treadmill-a-machine-learning-approach
#2
Fabienne Reynard, Philippe Terrier
Dynamic balance in human locomotion can be assessed through the local dynamic stability (LDS) method. Whereas gait LDS has been used successfully in many settings and applications, little is known about its sensitivity to individual characteristics of healthy adults. Therefore, we reanalyzed a large dataset of accelerometric data measured for 100 healthy adults from 20 to 70 years of age performing 10 min treadmill walking. We sought to assess the extent to which the variations of age, body mass and height, sex, and preferred walking speed (PWS) could influence gait LDS...
October 25, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29028627/local-dynamic-stability-during-treadmill-walking-can-detect-children-with-developmental-coordination-disorder
#3
Merete B Speedtsberg, Sofie B Christensen, Jan Stenum, Thomas Kallemose, Jesper Bencke, Derek J Curtis, Bente R Jensen
OBJECTIVE: Developmental coordination disorder (DCD) is an innate impairment of motor coordination that affects basic locomotion and balance. This study investigated local dynamic stability of trunk accelerations during treadmill walking as an objective evaluation of gait stability and the sensitivity and specificity of this measure to discriminate children with DCD from typically developing children. METHOD: Eight children with DCD and ten age- and gender-matched typically developing children (TD) walked four minutes on a treadmill...
October 5, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28889946/dynamic-balance-in-persons-with-multiple-sclerosis-who-have-a-falls-history-is-altered-compared-to-non-fallers-and-to-healthy-controls
#4
Alexander T Peebles, Adam P Bruetsch, Sharon G Lynch, Jessie M Huisinga
Around 60% of persons with multiple sclerosis (MS) experience falls, however the dynamic balance differences between those who fall and those who don't are not well understood. The purpose of this study is to identify distinct biomechanical features of dynamic balance during gait that are different between fallers with MS, non-fallers with MS, and healthy controls. 27 recurrent fallers with MS, 28 persons with MS with no falls history, and 27 healthy controls walked on a treadmill at their preferred speed for 3min...
October 3, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28437756/local-dynamic-stability-and-gait-variability-during-attentional-tasks-in-young-adults
#5
Rina Márcia Magnani, Georgia Cristina Lehnen, Fábio Barbosa Rodrigues, Gustavo Souto de Sá E Souza, Adriano de Oliveira Andrade, Marcus Fraga Vieira
Cell phone use while walking may be a cognitive distraction and reduce visual and motor attention. Thus, the aim of this study was to verify the effects of attentional dual-tasks while using a cell phone in different conditions. Stability, regularity, and linear variability of trunk kinematics, and gait spatiotemporal parameters in young adults were measured. Twenty young subjects of both genders were asked to walk on a treadmill for 4min under the following conditions: (a) looking forward at a fixed target 2...
April 18, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28368823/monitoring-of-gait-quality-in-patients-with-chronic-pain-of-lower-limbs
#6
Philippe Terrier, Joane Le Carre, Marie-Laure Connaissa, Bertrand Leger, Francois Luthi
Severe injuries of lower extremities often lead to chronic pain and reduced walking abilities. We postulated that measuring free-living gait can provide further information about walking ability in complement to clinical evaluations. We sought to validate a method that characterizes free gaits with a wearable sensor. Over one week, 81 healthy controls (HC) and 66 chronic lower limb pain patients (CLLPP) hospitalized for multidisciplinary rehabilitation wore a simple accelerometer (Actigraph). In the acceleration signals, steady one-minute walks detected numbered 7,835 (5,085 in CLLPP and 2,750 in HC)...
March 28, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28293751/linear-and-nonlinear-gait-features-in-older-adults-walking-on-inclined-surfaces-at-different-speeds
#7
Marcus Fraga Vieira, Fábio Barbosa Rodrigues, Gustavo Souto de Sá E Souza, Rina Márcia Magnani, Georgia Cristina Lehnen, Adriano O Andrade
This study evaluated linear and nonlinear gait features in healthy older adults walking on inclined surfaces at different speeds. Thirty-seven active older adults (experimental group) and fifty young adults (control group) walked on a treadmill at 100% and ±20% of their preferred walking speed for 4 min under horizontal (0%), upward (UP) (+8%), and downward (DOWN) (-8%) conditions. Linear gait variability was assessed using the average standard deviation of trunk acceleration between strides (VAR). Gait stability was assessed using the margin of stability (MoS)...
June 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28243195/part-2-adaptation-of-gait-kinematics-in-unilateral-cerebral-palsy-demonstrates-preserved-independent-neural-control-of-each-limb
#8
Thomas C Bulea, Christopher J Stanley, Diane L Damiano
Motor adaptation, or alteration of neural control in response to a perturbation, is a potential mechanism to facilitate motor learning for rehabilitation. Central nervous system deficits are known to affect locomotor adaptation; yet we demonstrated that similar to adults following stroke, children with unilateral brain injuries can adapt step length in response to unilateral leg weighting. Here, we extend our analysis to explore kinematic strategies underlying step length adaptation and utilize dynamical systems approaches to elucidate how neural control may differ in those with hemiplegic CP across legs and compared to typically developing controls...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27451361/effects-of-general-fatigue-induced-by-incremental-maximal-exercise-test-on-gait-stability-and-variability-of-healthy-young-subjects
#9
Marcus Fraga Vieira, Gustavo Souto de Sá E Souza, Georgia Cristina Lehnen, Fábio Barbosa Rodrigues, Adriano O Andrade
The purpose of this study was to determine whether general fatigue induced by incremental maximal exercise test (IMET) affects gait stability and variability in healthy subjects. Twenty-two young healthy male subjects walked in a treadmill at preferred walking speed for 4min prior (PreT) the test, which was followed by three series of 4min of walking with 4min of rest among them. Gait variability was assessed using walk ratio (WR), calculated as step length normalized by step frequency, root mean square (RMSratio) of trunk acceleration, standard deviation of medial-lateral trunk acceleration between strides (VARML), coefficient of variation of step frequency (SFCV), length (SLCV) and width (SWCV)...
October 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27253774/estimating-gait-stability-asymmetrical-loading-effects-measured-using-margin-of-stability-and-local-dynamic-stability
#10
Timothy A Worden, Shawn M Beaudette, Stephen H M Brown, Lori Ann Vallis
Changes to intersegmental locomotor control patterns may affect body stability. Our study aimed to (a) characterize upper body dynamic stability in response to the unilateral addition of mass to the lower extremity and (b) evaluate the efficacy of 2 different stability measures commonly used in the literature to detect resulting symmetrical step pattern modifications across the weighted segments (spatial) and between epochs of the gait cycle (temporal). Young adults walked on a treadmill while unloaded or with weights applied unilaterally to their foot, shank, or thigh...
September 2016: Journal of Motor Behavior
https://www.readbyqxmd.com/read/27239774/the-effect-of-physical-exhaustion-on-gait-stability-in-young-and-older-individuals
#11
Dennis Hamacher, Alexander Törpel, Daniel Hamacher, Lutz Schega
Fatigue directly affects key features of the sensorimotor system which disorganizes voluntary control of movement accuracy. Local dynamic stability of walking is considered a sensitive measure for neuromuscular performance. To gain greater insight in the role of fatigue in motor behaviour in older and young adults during walking, the current experiment analyses gait patterns of healthy young but maximal fatigued individuals and gait patterns in submaximal fatigued older adults. Ten young and 18 older subjects performed a bicycle incremental exercise test on a cycle ergometer...
July 2016: Gait & Posture
https://www.readbyqxmd.com/read/27207386/a-preliminary-study-of-longitudinal-differences-in-local-dynamic-stability-between-recently-concussed-and-healthy-athletes-during-single-and-dual-task-gait
#12
Peter C Fino
Concussed individuals commonly exhibit locomotor deficits during dual-task gait that can last substantially longer than clinical signs and symptoms. Previous studies have examined traditional stability measures, but nonlinear stability may offer further information about the health of the motor control system post-concussion. For up to one year post-concussion, this study longitudinally examined the local dynamic stability of five concussed athletes and four matched healthy controls during single- and dual-task gait...
June 14, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/27197813/development-of-gait-motor-control-what-happens-after-a-sudden-increase-in-height-during-adolescence
#13
Maria Cristina Bisi, Rita Stagni
BACKGROUND: Basic understanding of motor control and its processes is a topic of well-known high relevance. During adolescence walking is theoretically a well-achieved fundamental skill, having reached a mature manifestation; on the other hand, adolescence is marked by a period of accelerated increases in both height and weight, referred as growth spurt. Thus, this period was chosen as a controlled and natural environment for partially isolating one of the factors influencing motor development (segment growth)...
May 20, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/27004658/the-reliability-of-local-dynamic-stability-in-walking-while-texting-and-performing-an-arithmetical-problem
#14
Dennis Hamacher, Daniel Hamacher, Alexander Törpel, Martin Krowicki, Fabian Herold, Lutz Schega
In the recent years, local dynamic stability of walking was frequently used to quantify motor control. Particularly, dual-task paradigms are used to assess a shift in gait control strategy to test walking in real life situations. Texting short messages while walking is a common motor-cognitive dual task of daily living. To able to monitor possible intervention effects on motor-cognitive dual-task performance, the test-retest reliability of the measure has to be evaluated. Since the reliability of the effects of cognitive tasks including texting while walking on local dynamic gait stability has not been assessed yet, this will be evaluated in the current study...
February 2016: Gait & Posture
https://www.readbyqxmd.com/read/26837304/fall-related-gait-characteristics-on-the-treadmill-and-in-daily-life
#15
Sietse M Rispens, Jaap H Van Dieën, Kimberley S Van Schooten, L Eduardo Cofré Lizama, Andreas Daffertshofer, Peter J Beek, Mirjam Pijnappels
BACKGROUND: Body-worn sensors allow assessment of gait characteristics that are predictive of fall risk, both when measured during treadmill walking and in daily life. The present study aimed to assess differences as well as associations between fall-related gait characteristics measured on a treadmill and in daily life. METHODS: In a cross-sectional study, trunk accelerations of 18 older adults (72.3 ± 4.5 years) were recorded during walking on a treadmill (Dynaport Hybrid sensor) and during daily life (Dynaport MoveMonitor)...
2016: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/26811155/local-stability-of-the-trunk-in-patients-with-degenerative-cerebellar-ataxia-during-walking
#16
Giorgia Chini, Alberto Ranavolo, Francesco Draicchio, Carlo Casali, Carmela Conte, Giovanni Martino, Luca Leonardi, Luca Padua, Gianluca Coppola, Francesco Pierelli, Mariano Serrao
This study aims to evaluate trunk local stability in a group of patients with degenerative primary cerebellar ataxia and to correlate it with spatio-temporal parameters, clinical variables, and history of falls. Sixteen patients affected by degenerative cerebellar ataxia and 16 gender- and age-matched healthy adults were studied by means of an inertial sensor to measure trunk kinematics and spatio-temporal parameters during over-ground walking. Trunk local dynamic stability was quantified by the maximum Lyapunov exponent with short data series of the acceleration data...
February 2017: Cerebellum
https://www.readbyqxmd.com/read/26737488/local-dynamic-stability-of-the-trunk-segments-and-lower-extremity-joints-during-backward-walking
#17
Yu Wu, Fei Xiao, Dong-Yun Gu
Backward walking has become a popular training method in physical exercise and clinical rehabilitation. For the sake of safety, it is important to keep a stable gait during backward walking. However, the gait stability during backward walking was rarely studied. This study investigated the effects of walking direction on local dynamic stability of the trunk segments (neck, torso and pelvis) and lower extremity joints (hip, knee and ankle joint). The maximum Lyapunov exponents (λ(s)) of 17 young healthy male adults were calculated while they were walking under three conditions: backward walking with preferred walking speed (BW), forward walking (FW) with the same speed determined by BW, and forward walking with normal speed (FWN)...
2015: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/26682629/motor-cognitive-dual-task-training-improves-local-dynamic-stability-of-normal-walking-in-older-individuals
#18
RANDOMIZED CONTROLLED TRIAL
Dennis Hamacher, Daniel Hamacher, Kathrin Rehfeld, Lutz Schega
BACKGROUND: Extreme levels of gait variability and local dynamic stability of walking are associated with risk of falling and reduced executive functions. However, it is not sufficiently investigated how gait variability and local dynamic stability of human walking develop in the course of a motor-cognitive intervention. As dancing implies high demands on (and therewith trains) executive functioning and motor control, it might increase local dynamic stability or reduce gait variability...
February 2016: Clinical Biomechanics
https://www.readbyqxmd.com/read/26661338/coordination-dynamics-of-a-symmetrically-loaded-gait
#19
Daniel M Russell, Joshua L Haworth, Cesar Martinez-Garza
Asymmetries in the resonant frequency of limbs/effectors lead to changes in coordination dynamics, including deviations in relative phase at ϕ = 0 or π rad and reduced stability. These effects have been successfully modeled by the extended Haken-Kelso-Bunz (HKB) coupled oscillator model (Kelso et al. in Attention and performance XIII. Erlbaum, Hillsdale, pp 139-169, 1990), and supported in laboratory tasks of rhythmic limb motions. Efforts to apply the HKB model to walking have supported the predicted deviations in phase, but not the expected decreases in coordination stability...
March 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/26652504/phase-dependent-changes-in-local-dynamic-stability-during-walking-in-elderly-with-and-without-knee-osteoarthritis
#20
Armaghan Mahmoudian, Sjoerd M Bruijn, Hamid Reza F Yakhdani, Onno G Meijer, Sabine M P Verschueren, Jaap H van Dieen
Previously, we reported reduced time-averaged knee local stability, in the unaffected, but not the affected leg of elderly with knee osteoarthritis OA compared to controls. Since stability may show phase-related changes, we reanalyzed the dataset reported previously using time-dependent local stability, λ(t), and also calculated time-averaged local stability, λs, for comparison. We studied treadmill walking at increasing speeds, focusing on sagittal plane knee movements. 16 patients, 12 healthy peers and 15 young subjects were measured...
January 4, 2016: Journal of Biomechanics
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