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gait variability

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https://www.readbyqxmd.com/read/28742277/the-immediate-and-short-term-effects-of-real-time-knee-adduction-moment-feedback-on-the-peak-and-cumulative-knee-load-during-walking
#1
Brennan Jackson, Keith E Gordon, Alison H Chang
The peak external knee adduction moment (pKAM), KAM impulse, and peak knee flexion moment (pKFM) during gait are important loading variables in medial tibiofemoral osteoarthritis. We evaluated the effects of gait modification, using real-time pKAM visual feedback, on pKAM, KAM impulse, and pKFM; and whether participants could maintain the KAM-reducing gait after feedback removal. Eleven healthy individuals performed a series of walking trials on a split-belt instrumented treadmill under 4 conditions of Baseline, Feedback, No Feedback Early, and No Feedback Late...
July 25, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28738883/recurrent-c-g1636a-p-g546s-mutation-of-col2a1-in-a-chinese-family-with-skeletal-dysplasia-and-different-metaphyseal-changes-a-case-report
#2
Jing Chen, Xiaomin Ma, Yulin Zhou, Guimei Li, Qiwei Guo
BACKGROUND: Mutations in the COL2A1 gene cause type II collagenopathies characterized by skeletal dysplasia with a wide spectrum of phenotypic severity. Most COL2A1 mutations located in the triple-helical region, and the glycine to bulky amino acid substitutions (e.g., glycine to serine) in the Gly-X-Y repeat were identified frequently. However, the same COL2A1 mutations are associated with different phenotypes and the genotype-phenotype relationship is still poorly understood. Therefore, the studies of more patients about the recurrent mutations in COL2A1 will be needed for further research to provide more comprehensive clinical and genetic data...
July 24, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28734543/crouch-severity-is-a-poor-predictor-of-elevated-oxygen-consumption-in-cerebral-palsy
#3
Katherine M Steele, Benjamin R Shuman, Michael H Schwartz
Children with cerebral palsy (CP) expend more energy to walk compared to typically-developing peers. One of the most prevalent gait patterns among children with CP, crouch gait, is often singled out as especially exhausting. The dynamics of crouch gait increase external flexion moments and the demand on extensor muscles. This elevated demand is thought to dramatically increase energy expenditure. However, the impact of crouch severity on energy expenditure has not been investigated among children with CP. We evaluated oxygen consumption and gait kinematics for 573 children with bilateral CP...
July 5, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28732483/effects-of-dual-task-and-walking-speed-on-gait-variability-in-people-with-chronic-ankle-instability-a-cross-sectional-study
#4
Shmuel Springer, Uri Gottlieb
BACKGROUND: Recent evidence suggests that impaired central sensorimotor integration may contribute to deficits in movement control experienced by people with chronic ankle instability (CAI). This study compared the effects of dual-task and walking speed on gait variability in individuals with and without CAI. METHODS: Sixteen subjects with CAI and 16 age- and gender-matched, able-bodied controls participated in this study. Stride time variability and stride length variability were measured on a treadmill under four different conditions: self-paced walking, self-paced walking with dual-task, fast walking, and fast walking with dual-task...
July 21, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28728959/mechanisms-contributing-to-gait-speed-and-metabolic-cost-in-children-with-unilateral-cerebral-palsy
#5
Tatiana Pessoa Silva Pinto, Sérgio Teixeira Fonseca, Rejane Vale Gonçalves, Thales Rezende Souza, Daniela Virgínia Vaz, Paula Lanna Pereira Silva, Marisa Cotta Mancini
BACKGROUND: Gait speed and metabolic cost are indicators of functional capacity in children with cerebral palsy. Uncovering their mechanisms helps guide therapeutic actions. OBJECTIVES: To investigate the contributions of energy-generating and energy-conserving mechanisms to gait speed and metabolic cost of children with unilateral cerebral palsy. METHODS: Data on eccentric and concentric muscle work, co-contraction, elastic torque and vertical stiffness of the affected-limb, forcing torque of the non-affected limb, gait speed and metabolic cost were collected from 14 children with unilateral cerebral palsy, aged 6-12 years...
July 5, 2017: Brazilian Journal of Physical Therapy
https://www.readbyqxmd.com/read/28728592/examination-of-the-gait-pattern-based-on-adjusting-and-resulting-components-of-the-stride-to-stride-variability-proof-of-concept
#6
U Laessoe, N M B Jensen, P Madeleine
BACKGROUND: Stride-to-stride variability may be used as an indicator in the assessment of gait performance, but the evaluation of this parameter is not trivial. In the gait pattern, a deviation in one stride must be corrected within the next strides (elemental variables) to ensure a steady gait (performance variable). The variance in these elemental and performance variables may therefore be evaluated as adjusting and resulting components of variability. We explored this approach to gait evaluation by matching the velocity of one stride to a subsequent stride with four different time lags ranging from 0...
July 20, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28728076/age-explains-limited-hip-extension-recovery-at-one-year-from-total-hip-arthroplasty
#7
Davide Mazzoli, Erika Giannotti, Maria Longhi, Paolo Prati, Stefano Masiero, Andrea Merlo
BACKGROUND: To investigate the dependency of the one-year recovery in gait after total hip arthroplasty on age and preoperative conditions. METHODS: Longitudinal retrospective study on 20 elderly patients with unilateral total hip arthroplasty consequent to hip osteoarthritis, assessed by gait analysis before surgery (T0), 2weeks (T1), 6 (T2) and 12months (T3) post-surgery. A set of variables assessing primary gait deviations and compensatory mechanisms were extracted from gait analysis data...
July 5, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28727159/children-with-heavy-prenatal-alcohol-exposure-exhibit-atypical-gait-characteristics
#8
Tenille C Taggart, Roger W Simmons, Jennifer D Thomas, Edward P Riley
BACKGROUND: Impaired motor function in children with histories of prenatal exposure to alcohol has been previously reported but, to date, no studies using quantitatively-based analyses have been performed to assess gait in these children. METHODS: Gait of children with (n = 18) or without (n = 26) prenatal alcohol exposure was assessed using an electronically instrumented walkway. Children completed blocks of trials traversing the walkway with different combinations of walking condition (increased, self-paced, and decreased cadence) and direction (forward and backward)...
July 20, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28725271/normal-foot-loading-parameters-and-repeatability-of-the-footscan%C3%A2-platform-system
#9
Chao Xu, Xin-Xin Wen, Lu-Yu Huang, Lei Shang, Xi-Xia Cheng, Ya-Bo Yan, Wei Lei
BACKGROUND: The Footscan® platform system is one of the most commonly used clinical tools for the measurement of the foot pressure. The present study was designed to assess the repeatability of the system and identify the range of loading parameters observed in the normal foot. METHODS: Measurements were collected from 32 healthy participants, 15 females and 17 males, twice at an interval of 1 week. Peak pressure (PP), contact time (CT), contact area (CA), pressure-time integral (PTI), and maximum force (MaF) were recorded; these parameters were investigated in 10 areas of the foot: medial heel, lateral heel, midfoot, first to fifth metatarsals, hallux, and toes 2-5...
2017: Journal of Foot and Ankle Research
https://www.readbyqxmd.com/read/28723790/relationship-of-medial-gastrocnemius-relative-fascicle-excursion-and-ankle-joint-power-and-work-performance-during-gait-in-typically-developing-children-a-cross-sectional-study
#10
Teresa Martín Lorenzo, Gustavo Albi Rodríguez, Eduardo Rocon, Ignacio Martínez Caballero, Sergio Lerma Lara
Muscle fascicles lengthen in response to chronic passive stretch through in-series sarcomere addition in order to maintain an optimum sarcomere length. In turn, the muscles' force generating capacity, maximum excursion, and contraction velocity is enhanced. Thus, longer fascicles suggest a greater capacity to develop joint power and work. However, static fascicle length measurements may not be taking sarcomere length differences into account. Thus, we considered relative fascicle excursions through passive ankle dorsiflexion may better correlate with the capacity to generate joint power and work than fascicle length...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28721516/motor-cognitive-dual-tasking-under-hypoxia
#11
Dennis Hamacher, Marie Brennicke, Tom Behrendt, Prisca Alt, Alexander Törpel, Lutz Schega
Hypoxic conditions diminish motor performance and cognitive functions, especially when the motor task and the cognitive task are conducted simultaneously. Hypoxia does further increase prefrontal cortex activity which provokes a reduced capability of efficient resource utilisation. This, again, might evoke that the capacity of the limited mental resources of a dual task will be reached at an earlier stage of task complexity. The purpose of our study was to examine whether a cognitive task would increase gait variability to a higher extent under hypoxic as compared to normoxic conditions...
July 18, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28721430/two-way-bridge-between-muscular-dysfunction-and-cognitive-impairment-secondary-analyses-of-sabe-bogota-study
#12
E Garcia-Cifuentes, D G David-Pardo, M G Borda, M U Perez-Zepeda, C A Cano-Gutiérrez
BACKGROUND AND OBJECTIVE: Muscular dysfunction and cognitive impairment are both disabling states, affecting especially the elderly. Thus, are important subjects of research. Our goal is to describe the association between these two entities in the elderly. METHODS: This is a secondary analysis from the SABE 2012 Bogota survey, which is a cross-sectional study. We define muscular dysfunction as an abnormal result in gait speed and/or handgrip strength tasks. Cognitive impairment was defined as an abnormal result in Mini Mental State Examination...
2017: Journal of Frailty & Aging
https://www.readbyqxmd.com/read/28720144/identifying-predictors-for-postoperative-clinical-outcome-in-lumbar-spinal-stenosis-patients-using-smart-shoe-technology
#13
Sunghoon I Lee, Andrew Campion, Alex Huang, Eunjeong Park, Jordan H Garst, Nima Jahanforouz, Marie Espinal, Tiffany Siero, Sophie Pollack, Marwa Afridi, Meelod Daneshvar, Saif Ghias, Majid Sarrafzadeh, Daniel C Lu
BACKGROUND: Approximately 33% of the patients with lumbar spinal stenosis (LSS) who undergo surgery are not satisfied with their postoperative clinical outcomes. Therefore, identifying predictors for postoperative outcome and groups of patients who will benefit from the surgical intervention is of significant clinical benefit. However, many of the studied predictors to date suffer from subjective recall bias, lack fine digital measures, and yield poor correlation to outcomes. METHODS: This study utilized smart-shoes to capture gait parameters extracted preoperatively during a 10 m self-paced walking test, which was hypothesized to provide objective, digital measurements regarding the level of gait impairment caused by LSS symptoms, with the goal of predicting postoperative outcomes in a cohort of LSS patients who received lumbar decompression and/or fusion surgery...
July 18, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28719981/the-mental-representation-of-the-human-gait-in-patients-with-severe-knee-osteoarthrosis-a-clinical-study-to-aid-understanding-of-impairment-and-disability
#14
Robert Jacksteit, Anett Mau-Moeller, Martin Behrens, Rainer Bader, Wolfram Mittelmeier, Ralf Skripitz, Tino Stöckel
OBJECTIVE: Objectives were (1) to explore differences in gait-specific long-term memory structures and gait performance between knee osteoarthrosis patients and healthy subjects and (2) to identify the extent to which the gait-specific mental representation is associated with gait performance. DESIGN: Cross-sectional study. SUBJECTS: In total, 18 knee osteoarthrosis patients and 18 control subjects. METHODS: Spatio-temporal (gait speed, step length) and temporophasic (stance time, swing time, single support time, total double support time) gait parameters and gait variability were measured with an electronic walkway (OptoGait)...
July 1, 2017: Clinical Rehabilitation
https://www.readbyqxmd.com/read/28719477/gait-analysis-on-force-treadmill-in-children-comparison-with-results-from-ground-based-force-platforms
#15
Luigi Tesio, Chiara Malloggi, Nicola M Portinaro, Luigi Catino, Nicola Lovecchio, Viviana Rota
Gait analysis (GA) typically includes surface electromyographic (sEMG) recording from several lower limb muscles, optoelectronic measurement of joint rotations, and force recordings from ground-based platforms. From the latter two variables, the muscle power acting on the lower limb joints can be estimated. Recently, gait analysis on a split-belt force treadmill (GAFT) was validated for the study of adult walking. It showed high reliability of spatiotemporal, kinematic, dynamic, and sEMG parameters, matching those obtainable with GA on the basis of ground walking...
July 17, 2017: International Journal of Rehabilitation Research. Revue Internationale de Recherches de Réadaptation
https://www.readbyqxmd.com/read/28716514/toe-walking-when-do-we-need-to-worry
#16
Olga M Morozova, Thomas F Chang, Mackenzie E Brown
Toe walking refers to the lack of heel strike during the stance phase of the gait cycle. It is a common variation of normal gait development in children. Persistent toe walking past 2-3 years of age warrants further evaluation as toe walking can be associated with cerebral palsy, muscular dystrophy, and autism spectrum disorders. The diagnosis of idiopathic toe walking is a diagnosis of exclusion used for children with persistent toe walking and no associated medical condition. Despite variable pathophysiology, the treatment of toe walking has similarities across diagnoses as it is focused on the maintenance of range of motion through the ankle...
July 14, 2017: Current Problems in Pediatric and Adolescent Health Care
https://www.readbyqxmd.com/read/28715287/outcome-measures-correlated-with-falls-in-nursing-home-residents-a-pilot-study
#17
Heidi S Moyer, Jeffrey Gale, Stephen Severe, Heather J Braden, Scott Hasson
Most fall risk and normal values are collected from the community-dwelling population, which is not representative of nursing home residents. The purpose of this study was twofold: 1) to determine the relationship of clinical impairment and activity limitation variables to the number of falls in nursing home residents; and 2) to determine the amount of variability that can be explained for the number of falls from these predictor variables. Seventeen active nursing home residents (83.7 ± 11.7 years) consented to participate...
July 17, 2017: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/28713254/short-term-effects-of-thoracic-spine-manipulation-on-the-biomechanical-organisation-of-gait-initiation-a-randomized-pilot-study
#18
Sébastien Ditcharles, Eric Yiou, Arnaud Delafontaine, Alain Hamaoui
Speed performance during gait initiation is known to be dependent on the capacity of the central nervous system to generate efficient anticipatory postural adjustments (APA). According to the posturo-kinetic capacity (PKC) concept, any factor enhancing postural chain mobility and especially spine mobility, may facilitate the development of APA and thus speed performance. "Spinal Manipulative Therapy High-Velocity, Low-Amplitude" (SMT-HVLA) is a healing technique applied to the spine which is routinely used by healthcare practitioners to improve spine mobility...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28712343/overload-from-anxiety-a-non-motor-cause-for-gait-impairments-in-parkinson-s-disease
#19
Kaylena A Ehgoetz Martens, Carolina R A Silveira, Brittany N Intzandt, Quincy J Almeida
Threatening situations lead to observable gait deficits in individuals with Parkinson's disease (PD) who suffer from high trait anxiety levels. The specific characteristics of gait that are affected appear to be similar to behaviors observed while walking during a dual-task (DT) condition. Yet, it remains unclear whether anxiety is similar to a cognitive load. If it were, then those with PD who have high trait anxiety might be expected to be more susceptible to DT interference during walking. Thus, the overall aim of this study was to evaluate whether trait anxiety influences gait during single-task (ST) and DT walking...
July 17, 2017: Journal of Neuropsychiatry and Clinical Neurosciences
https://www.readbyqxmd.com/read/28711652/dual-task-walking-over-a-compliant-foam-surface-a-comparison-of-people-with-transfemoral-amputation-and-controls
#20
Sara J Morgan, Brian J Hafner, Valerie E Kelly
People with lower limb amputation are unable to reliably sense ground characteristics due to compromised sensory inputs from the missing limb. As a result, they may rely on compensatory strategies, such as use of cognitive resources, when walking over complex surfaces. This study examined interactions between cognition and walking over a compliant surface in 14 people with transfemoral amputation (TFA) and 14 controls using a dual-task paradigm. Walking was assessed with quantitative motion analysis in both single-task (walking alone) and dual-task (walking while performing a cognitive task) conditions over a compliant foam surface...
July 10, 2017: Gait & Posture
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