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gait variability

Laura Wallard, Sophie Boulet, Olivier Cornu, Jean-Emile Dubuc, Philippe Mahaudens, Didier Postlethwaite, Maïté Van Cauter, Christine Detrembleur
BACKGROUND: The gait mechanism requires an efficient intersegmental coordination in order to ensure the displacement of the body while simultaneously maintaining the postural stability. However, intersegmental coordination may be disrupted by neurological or orthopaedic involvement, this increasing the metabolic cost associated with excessive or prolonged muscle co-contraction. RESEARCH QUESTION: Our aim was to evaluate and to understand how hip OA affects lower limbs coordination during gait by using the kinematic segmental covariation law method and predict the energy expenditure...
March 7, 2018: Gait & Posture
Carey L Holleran, Patrick W Hennessey, Abigail L Leddy, Gordhan B Mahtani, Gabrielle Brazg, Brian D Schmit, T George Hornby
BACKGROUND AND PURPOSE: Previous data suggest that large amounts of high-intensity stepping training in variable contexts (tasks and environments) may improve locomotor function, aerobic capacity, and treadmill gait kinematics in individuals poststroke. Whether similar training strategies are tolerated and efficacious for patients with other acute-onset neurological diagnoses, such as motor incomplete spinal cord injury (iSCI), is unknown. Individuals with iSCI potentially have greater bilateral impairments...
April 2018: Journal of Neurologic Physical Therapy: JNPT
Seung Yeol Lee, Soon-Sun Kwon, Chin Youb Chung, Kyoung Min Lee, Ki Hyuk Sung, Sangwoo Kim, Moon Seok Park
BACKGROUND: Simultaneous motion of the knee and ankle joints is required for many activities including gait. We aimed to evaluate the influence of surgery involving tendons around the knee on ankle motion during gait in the sagittal plane in cerebral palsy patients. METHODS: We included data from 55 limbs in 34 patients with spastic cerebral palsy. Patients were followed up after undergoing only distal hamstring lengthening with or without additional rectus femoris transfer...
March 15, 2018: BMC Musculoskeletal Disorders
Jocelyn F Hafer, Katherine A Boyer
BACKGROUND: Aging is associated with a loss of mobility and altered gait mechanics. Loss of function and mobility may be due to or exacerbated by low levels of physical activity in the aged. The mechanisms linking age-related changes in physiology, altered mobility and gait may be elucidated by examining movement coordination and coordination variability. RESEARCH QUESTION: The purpose of this study was to examine the impacts of age and habitual physical activity level on segment coordination and coordination variability during gait...
February 26, 2018: Gait & Posture
Noam Steinberg, Amihai Gottlieb, Itzhak Siev-Ner, Meir Plotnik
PURPOSE: The objective of this study was to estimate fall incidence and describe associated risk factors among people with a lower limb amputation (LLA) during various stages of recovery: the surgical ward, in-patient rehabilitation and return to community life. MATERIALS AND METHODS: A systematic search of relevant English language articles was performed using PubMed and EMBASE. Out of 310 initial "hits," six retrospective cohort studies, one prospective cohort study and eleven cross-sectional studies from which fall incidence and risk factors could be extracted, were selected for critical review...
March 14, 2018: Disability and Rehabilitation
Steven Morrison, Karl M Newell
This study was designed to examine the effect of increasing age and type 2 diabetes on the average responses and inter- and intraindividual variability of falls risk, reaction time, strength, and walking speed for healthy older adults and older persons with type 2 diabetes (T2DM). Seventy-five older individuals (controls) and 75 persons with T2DM aged between 50 and 79 years participated in the study. Assessments of falls risk, reaction time (RT), knee extension strength, and walking speed were conducted. The results revealed that advancing age for both control and T2DM groups was reflected by a progressive increase in falls risk, decreased leg strength and a decline (i...
March 14, 2018: Journal of Motor Behavior
Federico Gennaro, Eling D de Bruin
Assessment of the cortical role during bipedalism has been a methodological challenge. While surface electroencephalography (EEG) is capable of non-invasively measuring cortical activity during human locomotion, it is associated with movement artifacts obscuring cerebral sources of activity. Recently, statistical methods based on blind source separation revealed potential for resolving this issue, by segregating non-cerebral/artifactual from cerebral sources of activity. This step marked a new opportunity for the investigation of the brains' role while moving and was tagged mobile brain/body imaging (MoBI)...
2018: Frontiers in Public Health
E A Almeida, A C Sant'Anna, T G Crowe, M Macari, R L Furlan
Previously, we reported the effect of rearing conditions (plastic floors and air quality) on carcass injury development of broiler chickens at thermal comfort. In this study, the same rearing conditions were tested at thermal stress. The birds were reared in 2 climatic chambers, and the experiment followed a completely randomized design with one factor, flooring material: wood shaving or perforated plastic. The birds were divided into 16 experimental pens, being 8 females and 8 males. The studied parameters were the same as the previous study (ammonia concentration, carbon dioxide, performance, carcass yield, and variability, and scores of hygiene, gait and chest, and hocks and footpad lesions)...
March 8, 2018: Poultry Science
Yogev Koren, Yoav Raanan, Yisrael Parmet, Simona Bar-Haim
BACKGROUND AND OBJECTIVE: Walking is a complex human behavior, usually performed in a dynamic environment. Gait parameters are thought to reflect this complexity. Re-StepTM is a therapy system in the form of a computerized shoe, originally developed for the training and rehabilitation of individuals with brain damage. This system may be used as model for studying the complexity that underlies gait. As the first step, we present here the feasibility of the model, after establishing the validity and reliability of stride time and stride-time variability, observed in healthy adults...
March 13, 2018: Physiological Measurement
Henri De Vroey, Filip Staes, Ive Weygers, Evie Vereecke, Jos Vanrenterghem, Jan Deklerck, Geert Van Damme, Hans Hallez, Kurt Claeys
BACKGROUND: The use of inertial measurement units for the evaluation of temporal parameters of gait has been studied in many populations. However, currently no studies support the use of inertial measurement units for this purpose in the knee arthroplasty population. The objective of the present study was to investigate the agreement between an inertial measurement and camera based system for the assessment of temporal gait parameters in a knee arthroplasty population. METHODS: Sixteen knee arthroplasty patients performed 3 gait trials at a self-selected speed along a 6 m walk-way...
March 7, 2018: Clinical Biomechanics
Saskia Koene, Niki M Stolwijk, Rob Ramakers, Maaike de Vries, Lonneke de Boer, Mirian C H Janssen, Imelda de Groot, Jan Smeitink
Mitochondrial disorders are multisystem conditions that can potentially affect gait in many ways. The aim of this study was to select the optimal protocol to quantify the spatiotemporal parameters of gait in ambulatory children with mitochondrial disorders based on feasibility, test-retest reliability, and the difference between patients and controls. Gait at self-selected pace was quantified in ambulatory children with a genetically confirmed primary mitochondrial disease using the GAITRite electronic walkway...
March 12, 2018: Journal of Inherited Metabolic Disease
Peter C Raffalt, Louise R Nielsen, Stefan Madsen, Laurits Munk Højberg, Jessica Pingel, Jens Bo Nielsen, Jacob Wienecke, Tine Alkjær
The purpose of the present study was to determine the day-to-day reliability in stride characteristics in rats during treadmill walking obtained with two-dimensional (2D) motion capture. Kinematics were recorded from 26 adult rats during walking at 8 m/min, 12 m/min and 16 m/min on two separate days. Stride length, stride time, contact time, swing time and hip, knee and ankle joint range of motion were extracted from 15 strides. The relative reliability was assessed using intra-class correlation coefficients (ICC(1,1)) and (ICC(3,1))...
March 7, 2018: Journal of Biomechanics
Anton Khlopas, Morad Chughtai, Randa K Elmallah, David Hip-Flores, Arthur L Malkani, Steven F Harwin, Michael A Mont, Michael D Ries
BACKGROUND: Bone loss in patients undergoing revision THA poses a considerable challenge for orthopaedic surgeons. Often, to achieve better fixation in remaining bone, larger diameter acetabular components and reaming superiorly may be necessary. However, this is likely to raise the hip center of rotation, which may lead to altered biomechanics, specifically, insufficiency of the abductor muscles, altered gait, and increased risk of dislocation from impingement. More recently, a newer acetabular shell has been designed to more closely replicate the native hip center of rotation in these circumstances while maintaining adequate fixation...
February 2018: Clinical Orthopaedics and related Research
Natsuki Shimizu, Hiroyuki Hashidate, Tomohiro Ota, Akihiko Saito
Background Activity monitors are known to provide quantitative evaluation of physical activity in people with stroke. However, little evidence is available on the test-retest reliability and suitable measuring conditions for evaluating physical activity with an activity monitor in people with subacute stroke at a hospital setting. Objectives To evaluate reliability of physical activity measurement using an activity monitor in different measuring conditions in hospitalized people with subacute stroke according to gait ability...
March 12, 2018: Topics in Stroke Rehabilitation
Giovanni Morone, Stefano Masiero, Paola Coiro, Domenico De Angelis, Vincenzo Venturiero, Stefano Paolucci, Marco Iosa
BACKGROUND: Robotic walking training improves probability to reach an autonomous walking in non-ambulant patients affected by subacute stroke. However, little information is available regarding the prognostic factors for identifying best responder patients. The purpose of the present study is therefore to investigate the clinical features of patients with subacute stroke that might benefit more from robotic walking therapy. METHODS: One hundred subacute inpatients randomized in robotic or conventional gait training were assessed at baseline and after 4 weeks of training performed 5 times per week...
2018: Restorative Neurology and Neuroscience
Ji-Hyun Lee, Hyo-Jung Jeong, Heon-Seock Cynn, Tae-Woo Kang
BACKGROUND AND OBJECTIVES: Normal dorsiflexion (DF) required for normal gait is achieved through balance of the tibialis anterior (TA) and extensor hallucis longus (EHL). Imbalance may induce ankle and foot deformities and exacerbate pathology. EHL dominance is associated with progressive TA weakness, attributable to muscle non-use. When the EHL dominantly dorsiflexes the ankle, the big toe extends at the metatarsophalangeal joint (MTPJ) and pure ankle DF is absent. The effects of active MTPJ flexion on TA and EHL muscles, TA/EHL ratio, and the force applied during active DF in EHL-dominant (EHL-D) and EHL-non-dominant (EHL-ND) subjects were compared...
March 2, 2018: Journal of Back and Musculoskeletal Rehabilitation
Andrew K Buldt, Jamie J Allan, Karl B Landorf, Hylton B Menz
BACKGROUND: Foot posture is a risk factor for some lower limb injuries, however the underlying mechanism is not well understood. Plantar pressure analysis is one technique to investigate the interaction between foot posture and biomechanical function of the lower limb. RESEARCH QUESTION: The aim of this review was to investigate the relationship between foot posture and plantar pressure during walking. METHODS: A systematic database search was conducted using MEDLINE, CINAHL, SPORTDiscus and Embase to identify studies that have assessed the relationship between foot posture and plantar pressure during walking...
February 23, 2018: Gait & Posture
Ganesh R Naik, S Easter Selvan, Sridhar P Arjunan, Amit Acharyya, Dinesh K Kumar, Arvind Ramanujam, Hung T Nguyen
Surface electromyography (sEMG) data acquired during lower limb movements has the potential for investigating knee pathology. Nevertheless, a major challenge encountered with sEMG signals generated by lower limb movements is the intersubject variability, because the signals recorded from the leg or thigh muscles are contingent on the characteristics of a subject such as gait activity and muscle structure. In order to cope with this difficulty, we have designed a three-step classification scheme. First, the multichannel sEMG is decomposed into activities of the underlying sources by means of independent component analysis via entropy bound minimization...
March 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
C L Bailie, C Ijichi, N E O'Connell
Lower stocking densities (SD) are sometimes used in windowed houses for broilers as part of systems designed to produce high-welfare products. However, there is little scientific information on the effects of SD on welfare-related measures in broilers in windowed houses, and on whether these effects are influenced by environmental enrichment. Commercial windowed broiler chicken houses were assigned to 4 target SD (30, 32, 34, and 36 kg/m2) and 2 levels of access to string [+S (one piece per 1,000 birds/house), -S] in a 4 × 2 factorial arrangement...
March 5, 2018: Poultry Science
Tongjian You, Elisa F Ogawa, Saurja Thapa, Yurun Cai, Huan Zhang, Satoshi Nagae, Gloria Y Yeh, Peter M Wayne, Ling Shi, Suzanne G Leveille
BACKGROUND: Chronic pain is associated with poorer cognition and mobility, and fall risk in older adults. AIMS: To investigate the feasibility of a randomized controlled trial of mind-body exercise (Tai Chi) versus a light physical exercise in older adults with multisite pain. METHODS: Adults aged ≥ 65 years with multisite pain who reported falling in the past year or current use of an assistive device were recruited from Boston area communities...
March 6, 2018: Aging Clinical and Experimental Research
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