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https://www.readbyqxmd.com/read/28340371/walking-adaptability-assessments-with-the-interactive-walkway-between-systems-agreement-and-sensitivity-to-task-and-subject-variations
#1
Daphne J Geerse, Bert H Coolen, Melvyn Roerdink
The ability to adapt walking to environmental circumstances is an important aspect of walking, yet difficult to assess. The Interactive Walkway was developed to assess walking adaptability by augmenting a multi-Kinect-v2 10-m walkway with gait-dependent visual context (stepping targets, obstacles) using real-time processed markerless full-body kinematics. In this study we determined Interactive Walkway's usability for walking-adaptability assessments in terms of between-systems agreement and sensitivity to task and subject variations...
March 2, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28339904/validity-of-different-activity-monitors-to-count-steps-in-an-inpatient-rehabilitation-setting
#2
Daniel Treacy, Leanne Hassett, Karl Schurr, Sakina Chagpar, Serene S Paul, Catherine Sherrington
Background: Commonly used activity monitors have been shown to be accurate in counting steps in active people, however, further validation is needed in slower walking populations. Objectives: To determine the validity of activity monitors for measuring step counts in rehabilitation inpatients compared to visually-observed step counts. To explore the influence of gait parameters, activity monitor position and use of walkers on activity monitor accuracy. Methods: 166 inpatients admitted to a rehabilitation unit with an average walking speed of 0...
March 2, 2017: Physical Therapy
https://www.readbyqxmd.com/read/28339828/single-session-of-functional-electrical-stimulation-assisted-walking-produces-corticomotor-symmetry-changes-related-to-changes-in-poststroke-walking-mechanics
#3
Jacqueline A Palmer, HaoYuan Hsiao, Tamara Wright, Stuart A Binder-Macleod
Background: Recent research demonstrated that symmetry of corticomotor drive to paretic and nonparetic plantarflexor muscles are related to the biomechanical ankle moment strategy that individuals with chronic stroke used to achieve their greatest walking speeds. Rehabilitation strategies that promote corticomotor balance could potentially improve post-stroke walking mechanics and enhance functional ambulation. Objective: To 1) test the effectiveness of a single session of gait training using functional electrical stimulation (FES) to improve plantarflexor corticomotor symmetry and plantarflexion ankle moment symmetry and 2) determine if changes in corticomotor symmetry relate to changes in ankle moment symmetry within the session...
February 23, 2017: Physical Therapy
https://www.readbyqxmd.com/read/28338618/real-time-gait-event-detection-based-on-kinematic-data-coupled-to-a-biomechanical-model-%C3%A2
#4
Stefan Lambrecht, Anna Harutyunyan, Kevin Tanghe, Maarten Afschrift, Joris De Schutter, Ilse Jonkers
Real-time detection of multiple stance events, more specifically initial contact (IC), foot flat (FF), heel off (HO), and toe off (TO), could greatly benefit neurorobotic (NR) and neuroprosthetic (NP) control. Three real-time threshold-based algorithms have been developed, detecting the aforementioned events based on kinematic data in combination with a biomechanical model. Data from seven subjects walking at three speeds on an instrumented treadmill were used to validate the presented algorithms, accumulating to a total of 558 steps...
March 24, 2017: Sensors
https://www.readbyqxmd.com/read/28338437/contralateral-peripheral-neurotization-for-a-hemiplegic-hindlimb-after-central-neurological-injury
#5
Mou-Xiong Zheng, Xu-Yun Hua, Su Jiang, Yan-Qun Qiu, Yun-Dong Shen, Wen-Dong Xu
OBJECTIVE Contralateral peripheral neurotization surgery has been successfully applied to rescue motor function of the hemiplegic upper extremity in patients with central neurological injury (CNI). It may contribute to strengthened neural pathways between the contralesional cortex and paretic limbs. However, the effect of this surgery in the lower extremities remains unknown. In the present study the authors explored the effectiveness and safety of contralateral peripheral neurotization in treating a hemiplegic lower extremity following CNI in adult rats...
March 24, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28338366/effects-of-bout-duration-on-players-internal-and-external-loads-during-small-sided-games-in-young-soccer-players
#6
Yusuf Köklü, Utku Alemdaroğlu, Hamit Cihan, Del P Wong
PURPOSE: This study investigated the effects of different bout durations on internal and external loads of young soccer players during different small-sided games (SSGs). METHOD: Fifteen male young soccer players (average age 17 ± 1 years) participated in 2 vs 2, 3 vs 3 and 4 vs 4 SSGs. All games lasted 12 min playing time in total, but each SSG format further consisted of four bout durations: continuous (CON: 1 bout x 12 min) or interval with short (SBD: 6 bouts x 2 min), medium (MBD: 3 bouts x 4 min) or long (LBD: 2 bouts x 6 min) bout durations...
March 24, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28337148/on-the-estimation-accuracy-of-the-3d-body-center-of-mass-trajectory-during-human-locomotion-inverse-vs-forward-dynamics
#7
Gaspare Pavei, Elena Seminati, Dario Cazzola, Alberto E Minetti
The dynamics of body center of mass (BCoM) 3D trajectory during locomotion is crucial to the mechanical understanding of the different gaits. Forward Dynamics (FD) obtains BCoM motion from ground reaction forces while Inverse Dynamics (ID) estimates BCoM position and speed from motion capture of body segments. These two techniques are widely used by the literature on the estimation of BCoM. Despite the specific pros and cons of both methods, FD is less biased and considered as the golden standard, while ID estimates strongly depend on the segmental model adopted to schematically represent the moving body...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28331259/long-term-follow-up-on-the-donor-foot-after-thumb-reconstruction-using-big-toe-wrap-around-flap-in-two-different-operation-methods
#8
Zhi-Guo Ma, Yong-Jun Guo, Hou-Jun Yan, Qi-Ming Li, Bin Ma
The function of the donor foot has been affected after using big toe wrap-around flap for thumb reconstruction. A modified operation method has been developed to reduce the adverse effect on the donor foot. The current study compared the long-term effect of the classic and the modified operation methods on the donor foot. Gait analysis was carried out, including how the patient walked, the walking speed and walking distance, and how the patient jumped and ran. Plantar pressure was measured while the patient was standing and moving...
February 2017: Indian Journal of Surgery
https://www.readbyqxmd.com/read/28330471/robot-assisted-gait-training-lokomat-improves-walking-function-and-activity-in-people-with-spinal-cord-injury-a-systematic-review
#9
REVIEW
Ki Yeun Nam, Hyun Jung Kim, Bum Sun Kwon, Jin-Woo Park, Ho Jun Lee, Aeri Yoo
Robot-assisted gait training (RAGT) after spinal cord injury (SCI) induces several different neurophysiological mechanisms to restore walking ability, including the activation of central pattern generators, task-specific stepping practice and massed exercise. However, there is no clear evidence for the optimal timing and efficacy of RAGT in people with SCI. The aim of our study was to assess the effects of RAGT on improvement in walking-related functional outcomes in patients with incomplete SCI compared with other rehabilitation modalities according to time elapsed since injury...
March 23, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28330348/learning-molecular-energies-using-localized-graph-kernels
#10
Grégoire Ferré, Terry Haut, Kipton Barros
Recent machine learning methods make it possible to model potential energy of atomic configurations with chemical-level accuracy (as calculated from ab initio calculations) and at speeds suitable for molecular dynamics simulation. Best performance is achieved when the known physical constraints are encoded in the machine learning models. For example, the atomic energy is invariant under global translations and rotations; it is also invariant to permutations of same-species atoms. Although simple to state, these symmetries are complicated to encode into machine learning algorithms...
March 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28329787/circulating-estrogen-levels-and-self-reported-health-and-mobility-limitation-in-community-dwelling-men-of-the-framingham-heart-study
#11
Guneet Kaur Jasuja, Thomas G Travison, Joanne M Murabito, Maithili N Davda, Adam J Rose, Shehzad Basaria, Andrea Coviello, Ramachandran S Vasan, Ralph D'Agostino, Shalender Bhasin
Background: Self-rated health is a commonly used global indicator of health status. Few studies have examined the association of self-rated health and mobility with estrone and estradiol in men. Accordingly, we determined the cross-sectional, incident, and mediating relations between circulating estrone and estradiol levels with self-rated health, mobility limitation, and physical performance in community-dwelling men. Methods: The cross-sectional sample included 1,148 men, who attended Framingham Offspring Study Examinations 7 and 8...
October 24, 2016: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28329345/prevalence-and-clinical-correlates-of-sarcopenia-identified-according-to-the-ewgsop-definition-and-diagnostic-algorithm-in-hospitalized-older-people-the-glisten-study
#12
Lara Bianchi, Pasquale Abete, Giuseppe Bellelli, Mario Bo, Antonio Cherubini, Francesco Corica, Mauro Di Bari, Marcello Maggio, Giovanna Maria Manca, Maria Rosaria Rizzo, Andrea P Rossi, Francesco Landi, Stefano Volpato
Background: Prevalence of sarcopenia is substantial in most geriatrics settings, but estimates vary greatly across studies because of difference in population characteristics, diagnostic criteria, and methods used to assess muscle mass, muscle strength, and physical performance. We investigated the feasibility of the European Working Group on Sarcopenia in Older People (EWGSOP) algorithm assessment in hospitalized older adults and analyzed prevalence and clinical correlates of sarcopenia...
January 21, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28329121/very-low-calorie-diets-for-weight-loss-in-obese-older-adults-a-randomized-trial
#13
Cilla J Haywood, Luke A Prendergast, Katrina Purcell, Lauren Le Fevre, Wen Kwang Lim, Mary Galea, Joseph Proietto
Background: Obesity contributes to disability in older adults, and this is offset by weight loss and exercise. Very Low Calorie Diets (VLCDs) achieve rapid weight loss; however, these have not been rigorously evaluated in older people. Methods: A randomized trial was conducted from August 2012 through December 2015. The intervention was 12 weeks of thrice weekly exercise combined with either healthy eating advice (Ex/HE), hypocaloric diet (Ex/Diet), or VLCD (Ex/VLCD)...
February 20, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28328565/control-of-walking-speed-in-children-with-cerebral-palsy
#14
Jon R Davids, Nina Q Cung, Suzy Chen, Mitell Sison-Williamson, Anita M Bagley
BACKGROUND: Children's ability to control the speed of gait is important for a wide range of activities. It is thought that the ability to increase the speed of gait for children with cerebral palsy (CP) is common. This study considered 3 hypotheses: (1) most ambulatory children with CP can increase gait speed, (2) the characteristics of free (self-selected) and fast walking are related to motor impairment level, and (3) the strategies used to increase gait speed are distinct among these levels...
March 21, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28327133/improved-knee-biomechanics-among-patients-reporting-a-good-outcome-in-knee-related-quality-of-life-one-year-after-total-knee-arthroplasty
#15
Josefine E Naili, Per Wretenberg, Viktor Lindgren, Maura D Iversen, Margareta Hedström, Eva W Broström
BACKGROUND: It is not well understood why one in five patients report poor outcomes following knee arthroplasty. This study evaluated changes in knee biomechanics, and perceived pain among patients reporting either a good or a poor outcome in knee-related quality of life after total knee arthroplasty. METHODS: Twenty-eight patients (mean age 66 (SD 7) years) were included in this prospective study. Within one month of knee arthroplasty and one year after surgery, patients underwent three-dimensional (3D) gait analysis, completed the Knee Injury and Osteoarthritis Outcome Score (KOOS), and rated perceived pain using a visual analogue scale...
March 21, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28325917/a-quadruped-robot-exhibiting-spontaneous-gait-transitions-from-walking-to-trotting-to-galloping
#16
Dai Owaki, Akio Ishiguro
The manner in which quadrupeds change their locomotive patterns-walking, trotting, and galloping-with changing speed is poorly understood. In this paper, we provide evidence for interlimb coordination during gait transitions using a quadruped robot for which coordination between the legs can be self-organized through a simple "central pattern generator" (CPG) model. We demonstrate spontaneous gait transitions between energy-efficient patterns by changing only the parameter related to speed. Interlimb coordination was achieved with the use of local load sensing only without any preprogrammed patterns...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28324993/dynamic-knee-muscle-co-contraction-quantified-during-walking
#17
Annachiara Strazza, Alessandro Mengarelli, Valentina Agostini, Marco Knaflitz, Laura Burattini, Sandro Fioretti, Francesco Di Nardo
The purpose of the present study was the quantification of the co-activation patterns of the knee extensor and flexor muscles during walking at self-selected speed and cadence. To this aim, the Statistical Gait Analysis, a recent methodology providing a statistical characterization of gait, was performed on surface EMG signals from Vastus Lateralis (VL) and Medial Hamstrings (MH) in 14 healthy young adult subjects. Muscular co-contraction was assessed as the overlapping period between activation intervals of agonist and antagonist muscles...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324980/effect-of-wearable-sensor-dynamics-on-physical-activity-estimates-a-comparison-between-sci-vs-healthy-individuals
#18
C Jayaraman, C K Mummidisetty, A Jayaraman
Accuracy of physical activity estimates predicted by activity monitoring technologies may be affected by device location, analysis algorithms, type of technology (i.e. wearable/stickable) and population demographics (disability) being studied. Consequently, the main purpose of this investigation was to study such sensor dynamics (i.e. effect of device location, type and population demographics on energy expenditure estimates) of two commercial activity monitors. It was hypothesized that device location, population studied (disability), choice of proprietary algorithm and type of technology used will significantly impact the accuracy of the predicted physical activity metrics...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324752/vertical-ground-reaction-force-during-standing-and-walking-are-they-related-to-bone-mineral-density-left-right-asymmetries
#19
Marina Brozgol, Mira Arbiv, Anat Mirelman, Talia Herman, Jeffrey M Hausdorff, Nachum Vaisman
Osteoporosis is a systemic skeletal disease that is characterized by reduced bone mass, deterioration of bone tissue and skeletal fragility. The purpose of the current study was to determine whether asymmetrical femur bone mineral density (BMD) is associated with asymmetrical gait and standing. We compared measures of gait and standing asymmetry in subjects with (n=38) and without (n=11) significant left-right differences in BMD. Participants walked for 72m at their comfortable speed and stood quietly for 60s while outfitted with pressure-sensitive insoles...
March 7, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28321339/fatigue-and-muscle-strength-involving-walking-speed-in-parkinson-s-disease-insights-for-developing-rehabilitation-strategy-for-pd
#20
Ying-Zu Huang, Fang-Yu Chang, Wei-Chia Liu, Yu-Fen Chuang, Li-Ling Chuang, Ya-Ju Chang
Background. Problems with gait in Parkinson's disease (PD) are a challenge in neurorehabilitation, partly because the mechanisms causing the walking disability are unclear. Weakness and fatigue, which may significantly influence gait, are commonly reported by patients with PD. Hence, the aim of this study was to investigate the association between weakness and fatigue and walking ability in patients with PD. Methods. We recruited 25 patients with idiopathic PD and 25 age-matched healthy adults. The maximum voluntary contraction (MVC), twitch force, and voluntary activation levels were measured before and after a knee fatigue exercise...
2017: Neural Plasticity
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