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gait variability

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https://www.readbyqxmd.com/read/29778064/is-the-limit-cycle-attractor-an-almost-invariable-characteristic-in-human-walking
#1
Kim-Charline Broscheid, Christian Dettmers, Manfred Vieten
BACKGROUND: Common methods of gait analyses measure step length/width, gait velocity and gait variability to name just a few. Those parameters tend to be changing with fitness and skill of the subjects. But, do stable subject characteristic parameters in walking exist? Does the Limit-Cycle-Attractor qualify as such a parameter?. RESEARCH QUESTION: The attractor method is a new approach focusing on the dynamics of human motion. It classifies the fundamental walking pattern by calculating the Limit-Cycle-Attractor and its variability from acceleration data of the feet...
May 16, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29778063/comparison-of-three-dimensional-multi-segmental-foot-models-used-in-clinical-gait-laboratories
#2
Kristen Nicholson, Chris Church, Colton Takata, Tim Niiler, Brian Po-Jung Chen, Nancy Lennon, Julie P Sees, John Henley, Freeman Miller
BACKGROUND: Many skin-mounted three-dimensional multi-segmented foot models are currently in use for gait analysis. Evidence regarding the repeatability of models, including between trial and between assessors, is mixed, and there are no between model comparisons of kinematic results. RESEARCH QUESTION: This study explores differences in kinematics and repeatability between five three-dimensional multi-segmented foot models. The five models include duPont, Heidelberg, Oxford Child, Leardini, and Utah...
May 16, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29777477/cardiac-and-gait-rhythms-in-healthy-younger-and-older-adults-during-treadmill-walking-tasks
#3
Matthew W Wittstein, Joseph M Starobin, Randy J Schmitz, Sandra J Shulz, Francis Jay Haran, Christopher K Rhea
BACKGROUND: Aging and pathology result in changes in the dynamics of several physiological subsystems. Often, these changes are concurrent, altering the dynamics between subsystems. Cardiac and gait rhythms are one example in which patterns change during physical activity. AIMS: The purpose of this research is to simultaneously monitor changes in cardiac and gait rhythms when participants complete various treadmill walking tasks-normal speed, fast speed, and while synchronizing steps with a blinking metronome...
May 17, 2018: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/29777461/hiv-aids-and-an-overweight-body-mass-are-associated-with-excessive-intra-individual-variability-in-response-preparation
#4
Lance O Bauer
Factors other than HIV/AIDS may influence the cognitive function of patients living with this disease. The present study tested the influence of a common comorbid problem-an overweight body mass. It also examined intra-task variabilities in performance and brain activation as potentially more sensitive indicators of dysfunction than their mean levels. One-hundred seventy-eight participants were recruited and categorized by HIV-1 serostatus (-/+) and body mass (BMI < 26/≥ 26 kg/m2 ). They performed a simple time estimation task during which response time accuracy and electroencephalographic readiness potentials were recorded...
May 17, 2018: Journal of Neurovirology
https://www.readbyqxmd.com/read/29773512/increased-foot-strike-variability-in-parkinson-s-disease-patients-with-freezing-of-gait
#5
Jesal Shah, Lakshmi Pillai, David K Williams, Shannon M Doerhoff, Linda Larson-Prior, Edgar Garcia-Rill, Tuhin Virmani
INTRODUCTION: Freezing of gait (FOG) is a debilitating, late motor complication of Parkinson's disease (PD) that occurs in 50-80% of patients. Gait freezing significantly worsens quality of life by decreasing mobility and increasing falls. Studies have shown that patients with episodic freezing episodes also have deficits in continuous gait. We evaluated whether there was an objective gait correlate to the increased stumbling reported by many patients with gait freezing. METHODS: PD subjects and healthy controls (HC) were enrolled after IRB approval...
May 1, 2018: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29772495/walking-variations-in-healthy-women-wearing-high-heeled-shoes-shoe-size-and-heel-height-effects
#6
Enrica Di Sipio, Giulia Piccinini, Cristiano Pecchioli, Marco Germanotta, Chiara Iacovelli, Chiara Simbolotti, Arianna Cruciani, Luca Padua
BACKGROUND: The use of high heels is widespread in modern society in professional and social contests. Literature showed that wearing high heels can produce injurious effects on several structures from the toes to the pelvis. No studies considered shoe length as an impacting factor on walking with high heels. RESEARCH QUESTION: The aim of this study is to evaluate walking parameters in young healthy women wearing high heels, considering not only the heel height but also the foot/shoe size...
May 3, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29765877/gender-related-differences-in-reliability-of-thorax-lumbar-and-pelvis-kinematics-during-gait-in-patients-with-non-specific-chronic-low-back-pain
#7
Rasool Bagheri, Ismail Ebrahimi Takamjani, Mehdi Dadgoo, Amir Ahmadi, Javad Sarrafzadeh, Mohammad Reza Pourahmadi, Amir-Salar Jafarpisheh
Objective: To evaluate test-retest reliability of trunk kinematics relative to the pelvis during gait in two groups (males and females) of patients with non-specific chronic low back pain (NCLBP) using three-dimensional motion capture system. Methods: A convenience sample of 40 NCLBP participants (20 males and 20 females) was evaluated in two sessions. Participants were asked to walk with self-selected speed and kinematics of thorax and lumbar spine were captured using a 6-infrared-cameras motion-analyzer system...
April 2018: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/29765175/the-impact-of-walking-speed-on-interlimb-coordination-in-individuals-with-parkinson-s-disease
#8
Cheng-Chieh Lin, Robert C Wagenaar
[Purpose] Interlimb coordination can be affected by the symptoms associated with Parkinson's disease and may result in an increased risk of falls. The purpose of the current study was to compare changes in interlimb coordination in individuals with Parkinson's disease to healthy older adults while systematically manipulating walking speed. [Subjects and Methods] Participants walked on a treadmill while systematically increasing and decreasing the walking speed between 0.22 and 1.30 m/s. Kinematic data were collected by means of a three dimensional motion capture system...
May 2018: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29764690/inter-ray-variation-in-metatarsal-strength-properties-in-humans-and-african-apes-implications-for-inferring-bipedal-biomechanics-in-the-olduvai-hominid-8-foot
#9
Biren A Patel, Tea Jashashvili, Stephanie H Bui, Kristian J Carlson, Nicole L Griffin, Ian J Wallace, Caley M Orr, Randall L Susman
When measured as a ratio of mean midshaft diameter to bone length, the OH 8 fossil hominin foot exhibits a metatarsal (Mt) robusticity pattern of 1 > 5 > 3 > 4 > 2, which differs from the widely perceived "common" modern human pattern (1 > 5 > 4 > 3 > 2); African apes generally exhibit a third pattern (1 > 2 > 3 > 4 > 5). Largely because of the relative ranking of Mt2 and Mt5, OH 8 metatarsals structurally resemble the pattern exhibited by bipedal humans more than the pattern of quadrupedal and climbing African apes...
May 12, 2018: Journal of Human Evolution
https://www.readbyqxmd.com/read/29762541/biomechanical-gait-variable-estimation-using-wearable-sensors-after-unilateral-total-knee-arthroplasty
#10
Ik-Hyun Youn, Jong-Hoon Youn, Joseph A Zeni, Brian A Knarr
Total knee arthroplasty is a common surgical treatment for end-stage osteoarthritis of the knee. The majority of existing studies that have explored the relationship between recovery and gait biomechanics have been conducted in laboratory settings. However, seamless gait parameter monitoring in real-world conditions may provide a better understanding of recovery post-surgery. The purpose of this study was to estimate kinematic and kinetic gait variables using two ankle-worn wearable sensors in individuals after unilateral total knee arthroplasty...
May 15, 2018: Sensors
https://www.readbyqxmd.com/read/29758966/comparison-of-gait-patterns-in-elderly-fallers-and-non-fallers
#11
Moon-Seok Kwon, Yu-Ri Kwon, Yang-Sun Park, Ji-Won Kim
Gait is associated with an important risk factor of falls in the elderly. It is important to find differences of quantitative gait variables between fallers and non-fallers. The aim of this study was to investigate gait patterns in elderly fallers and non-fallers. Thirty-eight fallers and 38 non-fallers of similar age and height participated in this study. Subjects walked across the GaitRite walkway at self-selected comfortable speeds. Spatio-temporal gait variables were measured to characterize gait patterns...
April 27, 2018: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/29755513/motor-imagery-during-action-observation-of-locomotor-tasks-improves-rehabilitation-outcome-in-older-adults-after-total-hip-arthroplasty
#12
Uros Marusic, Sidney Grosprêtre, Armin Paravlic, Simon Kovač, Rado Pišot, Wolfgang Taube
This study aimed at determining whether the combination of action observation and motor imagery (AO + MI) of locomotor tasks could positively affect rehabilitation outcome after hip replacement surgery. Of initially 405 screened participants, 21 were randomly split into intervention group ( N = 10; mean age = 64 y; AO + MI of locomotor tasks: 30 min/day in the hospital, then 3×/week in their homes for two months) and control group ( N = 11, mean age = 63 y, active controls). The functional outcomes (Timed Up and Go, TUG; Four Step Square Test, FSST; and single- and dual-task gait and postural control) were measured before (PRE) and 2 months after surgery (POST)...
2018: Neural Plasticity
https://www.readbyqxmd.com/read/29753444/a-biplanar-x-ray-approach-for-studying-the-3d-dynamics-of-human-track-formation
#13
Kevin G Hatala, David A Perry, Stephen M Gatesy
Recent discoveries have made hominin tracks an increasingly prevalent component of the human fossil record, and these data have the capacity to inform long-standing debates regarding the biomechanics of hominin locomotion. However, there is currently no consensus on how to decipher biomechanical variables from hominin tracks. These debates can be linked to our generally limited understanding of the complex interactions between anatomy, motion, and substrate that give rise to track morphology. These interactions are difficult to study because direct visualization of the track formation process is impeded by foot and substrate opacity...
May 9, 2018: Journal of Human Evolution
https://www.readbyqxmd.com/read/29752826/post-polio-syndrome-and-the-late-effects-of-poliomyelitis-part-2-treatment-management-and-prognosis
#14
REVIEW
Julian K Lo, Lawrence R Robinson
Post-Polio Syndrome (PPS) is characterized by new muscle weakness and/or muscle fatigability that occurs many years following the initial poliomyelitis illness. An individualized approach to rehabilitation management is critical. Interventions may include rehabilitation management strategies, adaptive equipment, orthotic equipment, gait/mobility aids and a variety of therapeutic exercises. The progression of muscle weakness in PPS is typically slow and gradual; however, there is also variability in both the natural history of weakness and functional prognosis...
May 12, 2018: Muscle & Nerve
https://www.readbyqxmd.com/read/29750815/abnormal-gait-pattern-emerges-during-curved-trajectories-in-high-functioning-parkinsonian-patients-walking-in-line-at-normal-speed
#15
Anna Maria Turcato, Marco Godi, Marica Giardini, Ilaria Arcolin, Antonio Nardone, Andrea Giordano, Marco Schieppati
BACKGROUND: Several patients with Parkinson´s disease (PD) can walk normally along straight trajectories, and impairment in their stride length and cadence may not be easily discernible. Do obvious abnormalities occur in these high-functioning patients when more challenging trajectories are travelled, such as circular paths, which normally implicate a graded modulation in the duration of the interlimb gait cycle phases? METHODS: We compared a cohort of well-treated mildly to moderately affected PD patients to a group of age-matched healthy subjects (HS), by deliberately including HS spontaneously walking at the same speed of the patients with PD...
2018: PloS One
https://www.readbyqxmd.com/read/29746537/kinetic-and-kinematic-variables-affecting-trunk-flexion-during-level-walking-in-patients-with-lumbar-spinal-stenosis
#16
Tatsuya Igawa, Junji Katsuhira, Akira Hosaka, Kenta Uchikoshi, Shinichi Ishihara, Ko Matsudaira
Lumbar spinal stenosis causes cauda equina and nerve root compression, resulting in neurological symptoms. Although trunk flexion during level walking may alleviate these symptoms by enabling spinal canal decompression, some patients do not use this strategy. We aimed to identify the kinetic and kinematic variables that affect trunk flexion in patients during level walking. Gait was recorded in 111 patients using a three-dimensional motion capture system and six force plates. From the data recorded, walking velocity, bilateral step length, cycle time, maximum trunk flexion angle, forward pelvic tilt angle, pelvic rotation angle, maximum and minimum joint angles, and moment and power of the lower limb were calculated...
2018: PloS One
https://www.readbyqxmd.com/read/29741134/recovery-and-compensation-after-robotic-assisted-gait-training-in-chronic-stroke-survivors
#17
Alice De Luca, Honoré Vernetti, Cristina Capra, Ivano Pisu, Cinzia Cassiano, Laura Barone, Federica Gaito, Federica Danese, Giovanni Antonio Checchia, Carmelo Lentino, Psiche Giannoni, Maura Casadio
BACKGROUND: Gait re-education is a primary rehabilitation goal after stroke. In the last decades, robots with different mechanical structures have been extensively used in the clinical practice for gait training of stroke survivors. However, the effectiveness of robotic training is still controversial, especially for chronic subjects. In this study, we investigated the short-term effects of gait training assisted by an endpoint robot in a population of chronic stroke survivors. METHODS: Subjects were evaluated before and after training with clinical scales and instrumented gait analysis...
May 9, 2018: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/29738957/performance-of-an-attention-demanding-task-during-treadmill-walking-shifts-the-noise-qualities-of-step-to-step-variation-in-step-width
#18
Mark D Grabiner, Jane R Marone, Marilynn Wyatt, Pinata Sessoms, Kenton R Kaufman
BACKGROUND: The fractal scaling evident in the step-to-step fluctuations of stepping-related time series reflects, to some degree, neuromotor noise. RESEARCH QUESTION: The primary purpose of this study was to determine the extent to which the fractal scaling of step width, step width and step width variability are affected by performance of an attention-demanding task. We hypothesized that the attention-demanding task would shift the structure of the step width time series toward white, uncorrelated noise...
April 30, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29737626/identification-of-spatiotemporal-gait-parameters-and-pressure-related-characteristics-in-children-with-angelman-syndrome-a-pilot-study
#19
Joseph C Grieco, Arnaud Gouelle, Edwin J Weeber
BACKGROUND: Angelman syndrome (AS) leads to clinical manifestations that include intellectual impairments, developmental delay and poor motor function. Initiatives to develop therapeutics implie an urgent need to identify methods that accurately measure the motor abilities. METHODS: Six children with AS (6 to 9 years old) walked on an instrumented walkway to get spatiotemporal parameters (STPs) and center of pressure (CoP). These outcomes were compared to typically developing children (TD): 44 TD 6 to 9 years old and 20 TD 4 to 5 years old...
May 8, 2018: Journal of Applied Research in Intellectual Disabilities: JARID
https://www.readbyqxmd.com/read/29734501/using-multidimensional-topological-data-analysis-to-identify-traits-of-hip-osteoarthritis
#20
Jasmine Rossi-deVries, Valentina Pedoia, Michael A Samaan, Adam R Ferguson, Richard B Souza, Sharmila Majumdar
BACKGROUND: Osteoarthritis (OA) is a multifaceted disease with many variables affecting diagnosis and progression. Topological data analysis (TDA) is a state-of-the-art big data analytics tool that can combine all variables into multidimensional space. TDA is used to simultaneously analyze imaging and gait analysis techniques. PURPOSE: To identify biochemical and biomechanical biomarkers able to classify different disease progression phenotypes in subjects with and without radiographic signs of hip OA...
May 7, 2018: Journal of Magnetic Resonance Imaging: JMRI
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