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Gait & Posture

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https://www.readbyqxmd.com/read/29220753/a-systematic-review-of-the-gait-characteristics-associated-with-cerebellar-ataxia
#1
REVIEW
Ellen Buckley, Claudia Mazzà, Alisdair McNeill
BACKGROUND: Cerebellar Ataxias are a group of gait disorders resulting from dysfunction of the cerebellum, commonly characterised by slowly progressing incoordination that manifests as problems with balance and walking leading to considerable disability. There is increasing acceptance of gait analysis techniques to quantify subtle gait characteristics that are unmeasurable by current clinical methods This systematic review aims to identify the gait characteristics able to differentiate between Cerebellar Ataxia and healthy controls...
December 1, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29216598/sympathetic-nervous-system-activity-measured-by-skin-conductance-quantifies-the-challenge-of-walking-adaptability-tasks-after-stroke
#2
David J Clark, Sudeshna A Chatterjee, Theresa E McGuirk, Eric C Porges, Emily J Fox, Chitralakshmi K Balasubramanian
BACKGROUND: Walking adaptability tasks are challenging for people with motor impairments. The construct of perceived challenge is typically measured by self-report assessments, which are susceptible to subjective measurement error. The development of an objective physiologically-based measure of challenge may help to improve the ability to assess this important aspect of mobility function. The objective of this study to investigate the use of sympathetic nervous system (SNS) activity measured by skin conductance to gauge the physiological stress response to challenging walking adaptability tasks in people post-stroke...
December 1, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29207289/accuracy-evaluation-of-a-method-to-partition-ground-reaction-force-and-center-of-pressure-in-cane-assisted-gait-using-an-instrumented-cane-with-a-triaxial-force-sensor
#3
Arinori Kamono, Mizuki Kato, Naomichi Ogihara
Clarifying the biomechanics of cane-assisted gait in elderly individuals and patients with gait disorders is important for developing better therapeutic interventions in the fields of rehabilitation and orthopedics. However, if the foot and the cane in the ipsilateral hand are placed on the same force plate simultaneously, the force plate cannot separate the forces as it records the sum of the forces. To overcome this indeterminacy problem of the ground reaction force (GRF) and the center of pressure (COP) in cane-assisted gait analysis, a method to partition the GRF and COP using an instrumented cane with a force transducer has been proposed...
November 28, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29202358/increasing-mediolateral-standing-sway-is-associated-with-increasing-corticospinal-excitability-and-decreasing-m1-inhibition-and-facilitation
#4
Tulika Nandi, Beth E Fisher, Tibor Hortobágyi, George J Salem
In standing, corticospinal excitability increases and primary motor cortex (M1) inhibition decreases in response to anterior posterior or direction unspecific manipulations that increase task difficulty. However, mediolateral (ML) sway control requires greater active neural involvement. Therefore, the primary purpose of this study was to determine the pattern of change in neural excitability when ML postural task difficulty is manipulated and to test whether the neural excitability is proportional to ML sway magnitude across conditions...
November 28, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29202357/effect-of-parameter-selection-on-entropy-calculation-for-long-walking-trials
#5
Jennifer M Yentes, William Denton, John McCamley, Peter C Raffalt, Kendra K Schmid
It is sometimes difficult to obtain uninterrupted data sets that are long enough to perform nonlinear analysis, especially in pathological populations. It is currently unclear as to how many data points are needed for reliable entropy analysis. The aims of this study were to determine the effect of changing parameter values of m, r, and N on entropy calculations for long gait data sets using two different modes of walking (i.e., overground versus treadmill). Fourteen young adults walked overground and on a treadmill at their preferred walking speed for one-hour while step time was collected via heel switches...
November 28, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29179052/using-phone-sensors-and-an-artificial-neural-network-to-detect-gait-changes-during-drinking-episodes-in-the-natural-environment
#6
Brian Suffoletto, Pedram Gharani, Tammy Chung, Hassan Karimi
BACKGROUND: Phone sensors could be useful in assessing changes in gait that occur with alcohol consumption. This study determined (1) feasibility of collecting gait-related data during drinking occasions in the natural environment, and (2) how gait-related features measured by phone sensors relate to estimated blood alcohol concentration (eBAC). METHODS: Ten young adult heavy drinkers were prompted to complete a 5-step gait task every hour from 8pm to 12am over four consecutive weekends...
November 22, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29175641/effect-of-tibia-marker-placement-on-knee-joint-kinematic-analysis
#7
Yuhui Wen, Hongshi Huang, Yuanyuan Yu, Si Zhang, Jie Yang, Yingfang Ao, Shihong Xia
Variability of kinematic measures determined by different marker sets among sites participating in a collaborative study is necessary for determining the reliability of a multi-site gait analysis research. We compared knee kinematics based on different marker sets on the tibia, calculating by segmental optimization (SO) and multi-body optimization (MBO) methods respectively, in order to assess the effect of marker locations on the methods. 11 healthy subjects participated in the study with 33 markers attached to the lower extremity segments, and 4 groups were identified according to markers on the tibia...
November 22, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29179051/differences-in-pattern-of-variability-for-lower-extremity-kinematics-between-walking-and-running
#8
Amanda Estep, Steven Morrison, Shane Caswell, Jatin Ambegaonkar, Nelson Cortes
This study characterizes walking and running patterns in healthy individuals using linear and nonlinear methods Seventeen individuals (12 males, 5 females) volunteered for the study. 3D kinematic data during walking (WA) and running (RU) on a motorized treadmill were captured using reflective markers placed on lower body (200Hz). A single 25s trial (5000 data points) was collected for each gait task. WA speed was 1.39±0.12m/s, whereas RU speed was 2.56±0.27m/s. Variables of interest included ankle plantar/dorsi flexion, knee flexion/extension, knee abduction/adduction, hip flexion/extension, and hip abduction/adduction angles...
November 21, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29175639/joint-mechanical-asymmetries-during-low-and-high-demand-mobility-tasks-comparison-between-total-knee-arthroplasty-and-healthy-matched-peers
#9
Jesse C Christensen, Paul C LaStayo, Ryan L Mizner, Robin L Marcus, Christopher E Pelt, Gregory J Stoddard, K Bo Foreman
Chronic inter-limb joint mechanical asymmetry has been reported following total knee arthroplasty (TKA) during low-demand mobility tasks such as level walking. However, no study has compared the inter-limb asymmetry during a high-demand mobility task such as decline walking. The objective of this cross-sectional study was to compare inter-limb asymmetry differences during both level and decline walking tasks at six months following TKA compared to asymmetry present in an age, gender, body mass index and activity level matched healthy cohort...
November 21, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29161625/prediction-of-walk-to-run-transition-using-stride-frequency-a-test-retest-reliability-study
#10
Ernst Albin Hansen, Andreas Møller Nielsen, Lasse Andreas Risgaard Kristensen, Pascal Madeleine, Michael Voigt
The transition from walking to running has previously been predicted to occur at a point where the stride frequency starts getting closer to the running attractor than to the walking attractor. The two behavioural attractors were considered to be represented by the freely chosen stride frequencies during unrestricted treadmill walking and running. The aim of the present study was to determine the relative and absolute test-retest reliability of the predicted walk-to-run transition stride frequency. Healthy individuals (n=25) performed walking and running on a treadmill in a day-to-day test-retest design...
November 18, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29175640/an-exploratory-study-examining-factors-underpinning-postural-instability-in-older-adults-with-idiopathic-neck-pain
#11
June Quek, Julia Treleaven, Ross A Clark, Sandra G Brauer
There is limited understanding of potential mechanisms underpinning postural control deficits in people with neck pain. This study examined several characteristics that might explain impaired postural stability in a group of older adults with neck pain, and compared the results in this cohort with that of asymptomatic controls. In this cross-sectional study we compared physical activity, lower limb motor and sensory function, vestibular and visual function, falls efficacy and dizziness handicap in 84 older adults with (n=35, age 69...
November 16, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29156379/evaluating-the-immediate-effects-of-wearing-foot-orthotics-in-children-with-joint-hypermobility-syndrome-jhs-by-analysis-of-temperospatial-parameters-of-gait-and-dynamic-balance-a-preliminary-study
#12
P McDermott, E Wolfe, C Lowry, K Robinson, H P French
Joint Hypermobility Syndrome (JHS) in children, presents with increased joint range of motion and can lead to altered gait strategies and reduced dynamic balance. Despite limited evidence foot orthoses are sometimes prescribed to patients with JHS with the aim to improve the stability of their gait pattern and theoretically reduce associated symptoms of fatigue and joint pain. The purpose of this study was therefore to analyse the immediate effects of 'off the shelf' orthoses on temporospatial parameters of gait and dynamic balance in this cohort...
November 15, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29161626/the-effect-of-augmented-somatosensory-feedback-on-standing-postural-sway
#13
Angela Smalley, Scott C White, Robert Burkard
Impaired balance resulting from reduced postural control occurs with aging and various medical conditions. Sensory input for balance control is provided by the visual, vestibular and somatosensory systems. Previous research suggests that increased proprioceptive feedback from various lower extremity devices improves balance. Mixed results have been reported with the use of orthoses such as ankle foot orthoses (AFOs). In this study, 20 healthy subjects wore footplates in their shoes or straps around their lower legs in order to imitate the somatosensory feedback produced by wearing AFOs, but without providing ankle restriction...
November 14, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29153479/author-response-to-the-letter-the-association-of-bradykinesia-and-balance-control-in-patients-with-alzheimer-s-disease
#14
LETTER
Gro Gujord Tangen, Astrid Bergland, Knut Engedal, Anne Marit Mengshoel
No abstract text is available yet for this article.
November 14, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29169096/neuromuscular-compensatory-strategies-at-the-trunk-and-lower-limb-are-not-resolved-following-an-acl-reconstruction
#15
Grant Boggess, Kristin Morgan, Darren Johnson, Mary Lloyd Ireland, Jeffrey A Reinbolt, Brian Noehren
BACKGROUND: Following anterior cruciate ligament reconstruction (ACLR), patients present with greater trunk ipsilateral lean, which may affect knee kinetics and increase re-injury risk. However, there has been little research into neuromuscular factors controlling the trunk and their relation to the knee between healthy and ACLR subjects. This is critical to establish in order to develop more directed and effective interventions. HYPOTHESIS: As compared to healthy control subjects, ACLR subjects will demonstrate increased erector spinae and rectus abdominis co-contraction, greater rectus abdominis force and greater hamstring force that is correlated to increased forward trunk lean...
November 13, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29161624/are-there-associations-with-age-and-sex-in-walking-stability-in-healthy-older-adults
#16
Daan van Kooten, Florentina Hettinga, Kim Duffy, Jo Jackson, Matthew J D Taylor
The variability of the centre of pressure (COP) during walking can provide information in relation to stability when walking. The aim of this study was to investigate if age and sex were associated with COP variability, COP excursions, and COP velocities during walking. One-hundred and fourteen older adults (age 65.1±5.5 yrs.) participated in the study. A Kistler force platform (1000Hz) recorded the ground reaction forces and COPs during walking at a self-selected walking speed. The stance phase was divided, using the vertical GRF, into four sub-phases: loading response (LR), mid-stance (MSt), terminal stance (TSt), and pre-swing (PSw)...
November 13, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29153480/spatial-orientation-and-postural-control-in-patients-with-parkinson-s-disease
#17
E Pawlitzki, C Schlenstedt, N Schmidt, I Rotkirch, F Gövert, G Hartwigsen, K Witt
Postural instability is one of the most disabling and risky symptoms of advanced Parkinson's disease (PD). The purpose of this study was to investigate whether and how this is mediated by a centrally impaired spatial orientation. Therefore, we performed a spatial orientation study in 21 PD patients (mean age 68years, SD 8.5 years, 9 women) in a medically on condition and 21 healthy controls (mean age 68.9years, SD 5.5years, 14 women). We compared their spatial responses to the horizontal axis (Sakashita's visual target cancellation task), the vertical axis (bucket-test), the sagittal axis (tilt table test) and postural stability using the Fullerton Advanced Balance Scale (FAB)...
November 13, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29153477/biomechanical-adaptations-during-running-differ-based-on-type-of-exercise-and-fitness-level
#18
Lindsay V Slater, Austin S Simpson, Silvia S Blemker, Jay Hertel, Susan A Saliba, Arthur L Weltman, Joseph M Hart
Lower extremity injuries are most common in more active and fit individuals, suggesting that adaptations from neuromuscular fatigue may differ depending on type of exercise and fitness level. The purpose of this study was to compare changes in gait in highly fit and recreationally active individuals before and after two exercise protocols. Lower extremity kinematics and kinetics were measured on the dominant leg during running before and after two exercise protocols (walking/sport) from 0 to 100% of gait in 24 healthy individuals divided into higher (n=13) and lower fitness (n=11) groups...
November 13, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29169097/altered-postural-control-variability-in-older-aged-individuals-with-a-history-of-lateral-ankle-sprain
#19
Masafumi Terada, Kyle Kosik, Nathan Johnson, Phillip Gribble
The current study aimed to examine postural control performance during a single-leg balance task in elderly individuals with and without a previous history of lateral ankle sprain (LAS). Eighteen adults with a previous hisoty of LAS (mean age=66years old) and 12 healthy controls (mean age=65years old) were included in the study. Participants performed three trials of a single-leg balance task during an eyes-opened condition for 20-s. Center of pressure (COP) trajectories in the anteroposterior (AP) and mediolateral (ML) directions were collected with a force plate...
November 12, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29156378/effect-of-robotic-assisted-gait-rehabilitation-on-dynamic-equilibrium-control-in-the-gait-of-children-with-cerebral-palsy
#20
L Wallard, G Dietrich, Y Kerlirzin, J Bredin
Due to the intensity and repetition of movement, roboticassisted gait training therapy could have a beneficial effect on the recovery and improvement of postural and locomotor functions of the patient. This study sought to highlight the effects of robotic-assisted gait rehabilitation in gait of children with Cerebral Palsy (CP). We analyzed the different strategies before and after this rehabilitation which was used in order to generate forward motion while maintaining balance. Data were collected by a motion analysis system (Vicon® - Oxford Metrics, Oxford, UK)...
November 11, 2017: Gait & Posture
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