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gait variability

Xuefeng Zhang, Running Chai, Haitao Wang, Xiangdong Ye
This paper presents a flexible plantar pressure sensor with a simple structure and easy accessibility, suitable for everyday use. In this study, the design, fabrication, and characteristics of both the composite and the sensor were involved. By using the solution method, the piezoresistive composite was fabricated by uniform dispersion of multiwall carbon nanotubes (MWCNTs) into the polydimethylsiloxane (PDMS) matrix. The proposed sensor consists of eight sensing elements with a laminated structure. The upper layer is a sensing layer made of the piezoresistive composite, and the lower layer is a flexible printed circuit-board working as electrodes...
September 13, 2018: Micromachines
Jae-Neung Lee, Yeong-Hyeon Byeon, Keun-Chang Kwak
This paper discusses the classification of horse gaits for self-coaching using an ensemble stacked auto-encoder (ESAE) based on wavelet packets from the motion data of the horse rider. For this purpose, we built an ESAE and used probability values at the end of the softmax classifier. First, we initialized variables such as hidden nodes, weight, and max epoch using the options of the auto-encoder (AE). Second, the ESAE model is trained by feedforward, back propagation, and gradient calculation. Next, the parameters are updated by a gradient descent mechanism as new parameters...
August 17, 2018: Micromachines
Mehran Kausar, Riikka E Mäkitie, Sanna Toiviainen-Salo, Jaakko Ignatius, Mariam Anees, Outi Mäkitie
Pathogenic sequence variants in the solute carrier family 26 member 2 (SLC26A2) gene result in lethal (achondrogenesis Ib and atelosteogenesis II) and non-lethal (diastrophic dysplasia and recessive multiple epiphyseal dysplasia, rMED) chondrodysplasias. We report on two new patients with rMED and very rare compound heterozygous mutation combinations in non-consanguineous families. Patient I presented in childhood with waddling gait and joint stiffness. Radiographs showed epiphyseal changes, bilateral coxa plana-deformity and knee valgus deformity, for which he underwent surgeries...
November 10, 2018: European Journal of Medical Genetics
Alison Mantel, Ashleigh Trapuzzano, Sara Chizmar, Lauren Haffke, Nicole Dawson
BACKGROUND/PURPOSE: To identify the unique predictors of comfortable and fast gait speed in community-dwelling older adults using measures of physical performance (eg, lower extremity strength and balance), self-reported balance confidence, and global cognitive function. METHODS: Demographic information was collected from 60 healthy, community-dwelling older adults older than 60 years. Participants completed the following assessments: Mini-Mental State Examination; Activities-Specific Balance Confidence Scale; 30-second Chair Stand (30-SCS); Functional Reach (FR); and gait speed (comfortable and fast) using the GAITRite system...
November 9, 2018: Journal of Geriatric Physical Therapy
Micaela Porta, Giuseppina Pilloni, Roberta Pili, Carlo Casula, Mauro Murgia, Giovanni Cossu, Massimiliano Pau
Background: Although physical activity (PA) is known to be beneficial in improving motor symptoms of people with Parkinson's disease (pwPD), little is known about the relationship between gait patterns and features of PA performed during daily life. Objective: To verify the existence of possible relationships between spatiotemporal and kinematic parameters of gait and amount/intensity of PA, both instrumentally assessed. Methods: Eighteen individuals affected by PD (10F and 8M, age 68...
2018: Parkinson's Disease
Ibrahim Engin Simsek, Ata Elvan, Metin Selmani, Mehmet Alphan Cakiroglu, Muge Kirmizi, Salih Angin, Burçin Akçay Bayraktar
BACKGROUND: In the relevant literature generalized hypermobility syndrome (GHS) has been shown to alter the kinetic and kinematic patterns of the human movement system. Although GHS affects the general body biomechanics of individuals, the body of knowledge in plantar pressure distribution in GHS is far from sufficient. PURPOSE: The aim of this study was to determine whether individuals with joint hypermobility syndrome have abnormal plantar pressure distribution during normal gait compared to healthy individuals...
November 2, 2018: Journal of Back and Musculoskeletal Rehabilitation
Rodrigo Vitorio, Samuel Stuart, Lilian T B Gobbi, Lynn Rochester, Lisa Alcock, Annette Pantall
BACKGROUND: Aging is associated with declining mobility, which negatively affects quality of life and incurs substantial economic costs. Techniques to maintain safe mobility in older adults are therefore essential. Rhythmic auditory cueing (RAC) can improve walking patterns in older adults. However, the neural correlates associated with RAC, how they are influenced by repeated exposure and their relationships with gait response, cognitive function, and depressive symptoms are unclear...
November 2018: Neurorehabilitation and Neural Repair
Danilo de Oliveira Silva, Christian John Barton, Ronaldo Valdir Briani, Bianca Taborda, Amanda Schenatto Ferreira, Marcella Ferraz Pazzinatto, Fábio Mícolis de Azevedo
BACKGROUND: Evidence indicates the presence of both kinesiophobia and knee extension strength deficits in women with patellofemoral pain (PFP). Both impairments may contribute to apparent compensatory gait patterns including reduced cadence and peak knee flexion during stair negotiation. RESEARCH QUESTION: Is kinesiophobia or knee extension strength associated with movement pattern in women with patellofemoral pain? METHODS: Forty women with PFP were assessed with three-dimensional kinematic analyses during stair descent; isokinetic dynamometry of the knee extensors (isometric, concentric and eccentric); and the Tampa scale for kinesiophobia...
November 1, 2018: Gait & Posture
Zhaojing Chen, Michael G Bemben, Debra A Bemben
MicroRNAs (miRNAs) are short, non-coding RNA molecules that fine tune posttranscriptional protein expression. Aging is accompanied by progressive declines in muscle mass and strength, and in bone mineral density (BMD). Although miRNAs in pathology have been extensively studied, the role of circulating miRNAs (c-miRNAs) in osteoporosis and sarcopenia has to date not been well understood. The purpose of this study was to examine the difference in bone and muscle specific c-miRNAs in postmenopausal women based on their bone and muscle status, and to determine the associations between these specific c-miRNAs and muscle and bone variables...
November 5, 2018: Bone
Kedar Kv Mate, Ayse Kuspinar, Sara Ahmed, Nancy E Mayo
OBJECTIVE: To estimate the extent to which sex/gender differences affect the relationships between tests of physical performance and self-reports about function in everyday life activities. Ecological validity is an important psychometric property when choosing tests of physical function, as they need to relate to everyday function. In Multiple Sclerosis (MS), the EQUI scale, modified Canadian Aerobic Fitness Test, grip strength, vertical jump, push-up, partial curl-up, gait speed (comfortable/fast), six-minute walk test, and nine-hole peg test are commonly used but the extent to which they relate to everyday function is understudied and the extent to which ecological validity of these tests differ between women and men is unknown...
November 4, 2018: Archives of Physical Medicine and Rehabilitation
Angela Jinsook Oh, Tiffany Chen, Mohammad Ali Shariati, Naz Jehangir, Thomas N Hwang, Yaping Joyce Liao
Cerebellar ataxia is a neurological disorder due to dysfunction of the cerebellum that affects coordination of fine movement, gait, and balance. Although ataxic patients commonly exhibit abnormal eye movement and have difficulties with saccadic reading, quantification of ocular motor abilities during reading in the clinical setting is rarely done. In this study, we assess visual performance with simple reading tests that can be used in the clinical setting and performed video infrared oculography in 11 patients with hereditary or acquired cerebellar ataxia and 11 age-matched controls...
2018: PloS One
Rebecca Moyer, Brent Lanting, Jacquelyn Marsh, Abdulaziz Al-Jurayyan, Laura Churchill, James Howard, Lyndsay Somerville
BACKGROUND: Total hip arthroplasty is recommended by clinical practice guidelines for improving pain in patients with severe hip osteoarthritis, yet functional limitations may persist postoperatively. The effects of the surgical approach on postoperative gait biomechanics may influence these limitations after total hip arthroplasty but are currently not well established. The purpose of this study was to investigate the differences in postoperative gait biomechanical differences, at early and late follow-up, in patients with hip osteoarthritis who underwent total hip arthroplasty using different surgical approaches...
November 6, 2018: JBJS Reviews
S Telfer, J J Bigham
BACKGROUND: The measurement of plantar pressure distributions during gait can provide insights into the effects of musculoskeletal disease on foot function. A range of hardware, software, and protocols are available for the collection of this type of data, with sometimes disparate and conflicting results reported between individual studies. In this systematic review and meta-regression analysis of dynamic regional peak pressures, we aimed to test if 1) the system used to obtain the pressure measurements and 2) the characteristics of the study populations had a significant effect on the results...
October 26, 2018: Gait & Posture
Dario Martelli, Boxi Xia, Antonio Prado, Sunil K Agrawal
BACKGROUND: Virtual reality (VR) has been used to study locomotor adaptability during balance-demanding tasks by exploring how humans react and adapt to the virtual environment (VE) and discordant sensorimotor stimulations. Previous research primarily focused on treadmill walking and little is known regarding the propensity for gait adaptations during overground walking and over time. RESEARCH QUESTION: To what extent healthy young adults modify and adapt gait during overground walking in a VE and with continuous multidirectional perturbations of the visual field while wearing a VR headset? METHODS: Twelve healthy young adults walked for 6 min on an instrumented walkway in four different conditions: RE, VE, and VE with antero-posterior (AP) and medio-lateral (ML) pseudo-random oscillations of the visual field...
October 26, 2018: Gait & Posture
Élvio R Gouveia, Bruna R Gouveia, Andreas Ihle, Matthias Kliegel, Adilson Marques, Duarte L Freitas
BACKGROUND: Balance and mobility impairments are important modifiable risk factors associated with falls in older people. PURPOSE: To investigate how different functional fitness components relate to balance and mobility, after controlling for age, sex, body mass index (BMI), and different physical activity (PA) domains. METHODS: This representative cross-sectional study included 802 individuals, 401 males and 401 females (69.8 ± 5.6 years) from Madeira, Portugal...
October 28, 2018: Archives of Gerontology and Geriatrics
Irene Koenig, Patric Eichelberger, Angela Blasimann, Antonia Hauswirth, Jean-Pierre Baeyens, Lorenz Radlinger
Surface electromyography is often used to assess muscle activity and muscle function. A wavelet approach provides information about the intensity of muscle activity and motor unit recruitment strategies at every time point of the gait cycle. The aim was to review papers that employed wavelet analyses to investigate electromyograms of lower extremity muscles during walking and running. Eleven databases were searched up until June 1st 2017. The composition was based on the PICO model and the PRISMA checklist...
2018: PloS One
Joseph A Zeni, Portia Flowers, Michael Bade, Victor Cheuy, Jennifer Stevens-Lapsley, Lynn Snyder-Mackler
Osteoarthritis (OA) progression in the contralateral limb after unilateral total knee arthroplasty (TKA) may be related to altered and asymmetrical movement patterns that overload the contralateral joints. The purpose of this study was to determine if biomechanical factors after unilateral TKA were associated with future contralateral TKA. 158 individuals who underwent unilateral TKA completed three dimensional motion analysis 6-24 months after unilateral TKA (baseline). Subjects were re-contacted for follow-up (mean 5...
November 2, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
Maria A Fahie, Jonathan C Cortez, Marc Ledesma, Yuhua Su
Objectives: To document temporospatial variables and gait symmetry measured by the GAITRite® system for normal, healthy dogs at the walk and trot with the leash side recorded. Study Design: Observational, prospective, cohort study. Sample Population: 66 healthy dogs of various common breeds with no evidence of lameness that were small (< 10 kg), medium (10- < 25 kg), large (25- < 40 kg), or giant (≥40 kg). Methods: Dogs walked and trotted at their preferred velocity on a pressure sensing walkway system...
2018: Frontiers in Veterinary Science
Christopher D Johnston, Jonathan S Goodwin, Jeffery T Spang, Brian Pietrosimone, J Troy Blackburn
Anterior cruciate ligament reconstruction (ACLR) restores joint stability following ACL injury but does not attenuate the heightened risk of developing knee osteoarthritis. Additionally, patellar tendon (PT) grafts incur a greater risk of osteoarthritis compared to hamstring grafts (HT). Aberrant gait biomechanics, including greater loading rates (i.e. impulsive loading), are linked to the development of knee osteoarthritis. However, the role of graft selection on walking gait biomechanics linked to osteoarthritis is poorly understood, thus the purpose of this study was to compare walking gait biomechanics between individuals with HT and PT grafts...
October 25, 2018: Journal of Biomechanics
Soran AminiAghdam, Roy Müller, Reinhard Blickhan
This study aimed to explore the control of dynamic stability of the imposed trunk-flexed gaits across uneven ground. For ten young healthy participants, we compared the anteroposterior margin of stability (MoS) and lower limb joint kinematics at foot-contact during accommodating a consecutive stepdown and step-up (10-cm visible drop) to that of level steps while maintaining four postures: regular erect, ∼30°, ∼50° and maximal trunk flexion from the vertical. Two-way repeated measures ANOVAs revealed no significant step × posture interactions for the MoS (p = ...
October 29, 2018: Human Movement Science
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