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Gait & Posture

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https://www.readbyqxmd.com/read/28092813/walking-mechanics-for-patellofemoral-pain-subjects-with-similar-self-reported-pain-levels-can-differ-based-upon-neuromuscular-activation
#1
Matthew K Seeley, S Jun Son, Hyunsoo Kim, J Ty Hopkins
Patellofemoral pain (PFP) is often studied on subjects who are classified using only self-reported data. Neuromuscular activation influences movement mechanics for PFP subjects, but is not likely to be self-reported. We compared lower-extremity mechanics, during a common movement (walking), between two subdivisions of a group of PFP subjects that were similar, based on common self-report tools, but different, based on a common objective measure of quadriceps activation. Our intent was to highlight the importance of objectively considering neuromuscular activation when researching PFP movement mechanics...
January 9, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28088678/three-dimensional-lumbar-segment-movement-characteristics-during-paediatric-cerebral-palsy-gait
#2
D Kiernan, A Malone, T O'Brien, C K Simms
Kinematic analysis of the trunk during cerebral palsy (CP) gait has been well described. In contrast, movement of the lumbar spine is generally ignored. This is most likely due to the complex nature of the spine. As an alternative to using complex sensor protocols, this study modelled the lumbar region as a single segment and investigated characteristic patterns of movement during CP gait. In addition, the impact of functional level of impairment and the relationship with lower lumbar spinal loading were examined...
January 3, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28073085/effect-of-investigator-observation-on-gait-parameters-in-individuals-with-and-without-chronic-low-back-pain
#3
Joshua Vickers, Austin Reed, Robert Decker, Bryan P Conrad, Marissa Olegario-Nebel, Heather K Vincent
Despite the ubiquity of gait assessment in clinic and research, it is unclear how observation impacts gait, particularly in persons with chronic pain and psychological stress. We compared temporal spatial gait patterns in people with and without chronic low back pain (CLBP) when they were aware and unaware of being observed. This was a repeated-measures, deception study in 55 healthy persons (32.0±12.4 yr, 24.2±2.7kg/m(2)) and persons with CLBP (51.9±17.9 yr, 27.8±4.4kg/m(2)). Participants performed one condition in which they were unaware of observation (UNW), and three conditions under investigator observation: (1) aware of observation (AWA), (2) investigators watching cadence, (3) investigators watching step length...
January 3, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28073083/the-edinburgh-visual-gait-score-the-minimal-clinically-important-difference
#4
L W Robinson, N D Clement, J Herman, M S Gaston
OBJECTIVE: The primary aim was to define the minimal clinically important difference (MCID) of the Edinburgh Visual Gait Score (EVGS) using correlations with the Gross Motor Function Classification System (GMFCS) and the Functional Assessment Questionnaire (FAQ). The secondary aim was to confirm the numerical value of the MCID in the Gait Profile Score (GPS). METHOD: The EVGS and GPS scores for 151 patients with diplegic cerebral palsy (GMFCS Levels I-III) were retrospectively identified from a database held at the study centre...
January 3, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28068514/interpersonal-interactions-for-haptic-guidance-during-maximum-forward-reaching
#5
S M Steinl, L Johannsen
Caregiver-patient interactions rely on interpersonal coordination (IPC) involving the haptic and visual modalities. We investigated in healthy individuals spontaneous IPC during joint maximum forward reaching. A 'contact-provider' (CP; n=2) kept light interpersonal touch (IPT) laterally with the wrist of the extended arm of a forward reaching, blind-folded 'contact-receiver' (CR; n=22). Due to the stance configuration, CP was intrinsically more stable. CR received haptic feedback during forward reaching in two ways: (1) presence of a light object (OBT) at the fingertips, (2) provision of IPT...
December 30, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28063387/effects-of-chronic-ankle-instability-on-kinetics-kinematics-and-muscle-activity-during-walking-and-running-a-systematic-review
#6
REVIEW
Gabriel Moisan, Martin Descarreaux, Vincent Cantin
The aim of this study is to systematically review and appraise studies assessing the effects of chronic ankle instability (CAI) on kinetics, kinematics and muscle activity during walking and running. The primary search was conducted in PubMed, Embase, CINAHL, AMED and SPORTDiscus. Only studies that compared participants with CAI with healthy participants and assessed kinetics, kinematics or muscle activity during walking or running were included. The risk of bias assessment was conducted using a modified version of the Quality Index checklist...
December 29, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28061431/effect-of-subthalamic-nucleus-deep-brain-stimulation-on-balance-in-parkinson-s-disease-a-static-posturographic-analysis
#7
Beatriz De la Casa-Fages, Fernando Alonso-Frech, Francisco Grandas
BACKGROUND: The effect of subthalamic deep brain stimulation on balance in Parkinson's disease remains unclear. OBJECTIVE: To evaluate the effect of subthalamic nucleus stimulation on balance in Parkinson's disease using posturography. METHODS: 16 patients (9 women) who underwent subthalamic deep brain stimulation [mean age 59.6 years (46-70); mean disease duration 15.6 years (7-25); mean duration of subthalamic stimulation 32.1 months (3...
December 29, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28073084/reliability-and-minimum-detectable-change-of-the-gait-deviation-index-gdi-in-post-stroke-patients
#8
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/28049109/ci2-for-creating-and-comparing-confidence-intervals-for-time-series-bivariate-plots
#9
David R Mullineaux
Currently no method exists for calculating and comparing the confidence-intervals (CI) for the time-series of a bivariate plot. The study's aim was to develop 'CI2' as a method to calculate the CI on time-series bivariate plots, and to identify if the CI between two bivariate time-series overlap. The test data were the knee and ankle angles from 10 healthy participants running on a motorised standard-treadmill and non-motorised curved-treadmill. For a recommended 10+ trials, CI2 involved calculating 95% confidence-ellipses at each time-point, then taking as the CI the points on the ellipses that were perpendicular to the direction vector between the means of two adjacent time-points...
December 23, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28043057/a-narrative-review-of-texting-as-a-visually-dependent-cognitive-motor-secondary-task-during-locomotion
#10
REVIEW
T Krasovsky, P L Weiss, R Kizony
Typing while walking is an example of people's ability to interact with technology while engaged in real life activities. Indeed, an increasing number of studies have investigated the typing of text messages (texting) as a dual task during locomotion. The objective of this review is to (1) describe the task requirements of texting-while-walking, (2) evaluate the measurement and psychometric properties of texting as a dual task, and (3) formulate methodological recommendations for researchers who use and report on texting-while-walking...
December 22, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28061401/the-effect-of-weight-bearing-asymmetry-on-dynamic-postural-stability-in-people-with-chronic-stroke
#11
Digna de Kam, Jip F Kamphuis, Vivian Weerdesteyn, Alexander C H Geurts
After stroke, weight-bearing asymmetry (WBA) towards the non-paretic side is associated with postural instability. It remains unknown whether WBA is a cause or consequence of postural instability, as both phenomena depend on stroke severity. We investigated the effect of WBA on the ability to recover from balance perturbations in people with stroke. Fourteen people in the chronic phase of stroke underwent multidirectional translational perturbations at three levels of initial WBA (0, 10 and 20% of body weight unloading of the paretic leg)...
December 21, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28061400/local-stability-and-kinematic-variability-in-walking-and-pole-walking-at-different-speeds
#12
Luca Zoffoli, Massimiliano Ditroilo, Ario Federici, Francesco Lucertini
This study investigated the kinematic variability and the local stability of walking and pole walking using two tri-axial accelerometers placed on the seventh cervical (C7) and the second sacral (S2) vertebrae of twenty-one adults. Each participant performed three 1-min trials of walking and pole walking on a motorized treadmill (60, 80, 100% of the preferred walk-to-run transition speed). Forty strides per trial were used to calculate, in all directions of C7 and S2, the median of the stride-to-stride median absolute deviation (medMAD) and the local divergence exponent (λ)...
December 21, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28043055/hip-mechanics-underlie-lower-extremity-power-training-induced-increase-in-old-adults-fast-gait-velocity-the-potsdam-gait-study-pogs
#13
Chantal M I Beijersbergen, Urs Granacher, Martijn Gäbler, Paul DeVita, Tibor Hortobágyi
BACKGROUND: Aging is associated with slowed gait and old compared with young adults generally walk with greater positive hip work (H1) and reduced positive ankle work (A2). The role of exercise interventions on old adults' gait mechanics that underlie training-induced improvements in gait velocity is unclear. We examined the effects of lower extremity power training and detraining on old adults' gait kinetics. METHODS: As part of the Potsdam Gait Study (POGS), healthy old adults completed a no-intervention control period (69...
December 21, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28038342/atypical-anticipatory-postural-adjustments-during-gait-initiation-among-individuals-with-sub-acute-stroke
#14
Roshanth Rajachandrakumar, Julia E Fraser, Alison Schinkel-Ivy, Elizabeth L Inness, Lou Biasin, Karen Brunton, William E McIlroy, Avril Mansfield
Anticipatory postural adjustments, executed prior to gait initiation, help preserve lateral stability when stepping. Atypical patterns of anticipatory activity prior to gait initiation may occur in individuals with unilateral impairment (e.g., stroke). This study aimed to determine the prevalence, correlates, and consequences of atypical anticipatory postural adjustment patterns prior to gait initiation in a sub-acute stroke population. Forty independently-ambulatory individuals with sub-acute stroke stood on two force plates and initiated gait at a self-selected speed...
December 21, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28038340/spatio-temporal-and-kinematic-gait-analysis-in-patients-with-frontotemporal-dementia-and-alzheimer-s-disease-through-3d-motion-capture
#15
Rosaria Rucco, Valeria Agosti, Francesca Jacini, Pierpaolo Sorrentino, Pasquale Varriale, Manuela De Stefano, Graziella Milan, Patrizia Montella, Giuseppe Sorrentino
Alzheimer's disease (AD) and behavioral variant of Frontotemporal Dementia (bvFTD) are characterized respectively by atrophy in the medial temporal lobe with memory loss and prefrontal and anterior temporal degeneration with dysexecutive syndrome. In this study, we hypothesized that specific gait patterns are induced by either frontal or temporal degeneration. To test this hypothesis, we studied the gait pattern in bvFTD (23) and AD (22) patients in single and dual task ("motor" and "cognitive") conditions...
December 21, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28033577/reliability-and-validity-of-the-protokinetics-movement-analysis-software-in-measuring-center-of-pressure-during-walking
#16
Robert C Lynall, Lisa A Zukowski, Prudence Plummer, Jason P Mihalik
Our purpose was to determine the validity and test-retest reliability of the Protokinetics Movement Analysis Software (PKMAS) in measuring center of pressure (COP) during walking as compared to a force plate gold standard. Twenty-five healthy participants (14 females, 11 males; age 20.0±1.5years) completed 2 testing sessions approximately 5days apart (mean=5.5±1.1 days). In each session, participants completed 16 total trials across a 6m walkway: 8 trials walking on a ProtoKinetics Zeno Walkway using PKMAS and 8 trials walking over 2 force plates arranged in an offset tandem pattern...
December 21, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28043054/dynamic-plantar-pressure-distribution-strength-capacity-and-postural-control-after-lisfranc-fracture-dislocation
#17
Alexander T Mehlhorn, Markus Walther, Tayfun Yilmaz, Lennart Gunst, Anja Hirschmüller, Norbert P Südkamp, Hagen Schmal
Substantial progress has been made in the operative treatment of Lisfranc fractures, however, the prognosis remains poor. We hypothesized that Lisfranc injuries change the postural control and muscle strength of the lower limb. Both are suggested to correlate with the clinical outcome and quality of life. 17 consecutive patients suffering from a Lisfranc fracture dislocation were registered, underwent open reduction and internal fixation and were followed-up for 50.5±25.7months (Mean±SDM). Biomechanical analysis of muscle strength capacities, postural control and plantar pressure distribution was assessed >6 month postoperatively...
December 19, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28033576/the-effects-of-various-visual-conditions-on-trunk-control-during-ambulation-in-chronic-post-stroke-patients
#18
Osamu Aoki, Yoshitaka Otani, Shinichiro Morishita, Kazuhisa Domen
Downward gazing is commonly observed among patients after a stroke during standing or walking as they struggle to maintain equilibrium. In this study, we aimed to evaluate the effects of fixed gazing and downward gazing on trunk control ability during gait. Sixteen subjects after a stroke (age: 51.3±4.9years) and seven healthy subjects (age: 65.1±3.4years) participated in this study. Participants walked 10m at a comfortable speed while they faced forward (no gaze point), gazed forward (with a fixed gaze point), gazed downward, and gazed downward while concealing their legs...
December 19, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28038341/standing-balance-and-inter-limb-balance-asymmetry-at-one-year-post-primary-anterior-cruciate-ligament-reconstruction-sex-differences-in-a-cohort-study-of-414-patients
#19
Ross A Clark, Stuart W Bell, Julian A Feller, Timothy S Whitehead, Kate E Webster
BACKGROUND: Static standing balance can be safely assessed early following anterior cruciate ligament reconstruction (ACLR), and deficits may have important implications for long-term outcomes. This study includes a large cohort of people post-ACLR and has the primary aim of establishing whether inter-limb and sex differences exist, with a secondary aim of assessing the association between static balance variables and other outcome measures. METHODS: A total of 414 patients with a primary ACLR performed a 30-s static single leg balance test...
December 16, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28064084/comparison-of-tri-axial-accelerometers-step-count-accuracy-in-slow-walking-conditions
#20
Yuanyuan Feng, Christopher K Wong, Vandana Janeja, Ravi Kuber, Helena M Mentis
Accelerometers have shown great promise and popularity for monitoring gait. However, the accuracy of accelerometers for gait analysis in slow walking conditions is largely unknown. In this study, we compared the accuracy of three accelerometers recommended for gait analysis - Axivity AX3, APDM Opal, and the Actigraph wGT3X-BT, by holding the step-count algorithm constant. We evaluated device accuracy in four minutes of treadmill walking at the speeds of 0.9m/s, 1.1m/s, and 1.3m/s. We constructed a symbolization of the gait data to count the steps using Piecewise Aggregate Approximation and compared the estimated step counts with observer counted steps from video recordings...
December 15, 2016: Gait & Posture
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