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https://www.readbyqxmd.com/read/28232284/an-entropy-assisted-musculoskeletal-shoulder-model
#1
Xu Xu, Jia-Hua Lin, Raymond W McGorry
Optimization combined with a musculoskeletal shoulder model has been used to estimate mechanical loading of musculoskeletal elements around the shoulder. Traditionally, the objective function is to minimize the summation of the total activities of the muscles with forces, moments, and stability constraints. Such an objective function, however, tends to neglect the antagonist muscle co-contraction. In this study, an objective function including an entropy term is proposed to address muscle co-contractions. A musculoskeletal shoulder model is developed to apply the proposed objective function...
February 10, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28227900/automated-assessment-of-postural-stability-system
#2
Alessandro Napoli, Christian R Ward, Stephen M Glassd, Carole Tucker, Iyad Obeid, Alessandro Napoli, Christian R Ward, Stephen M Glass, Carole Tucker, Iyad Obeid, Christian R Ward, Carole Tucker, Alessandro Napoli, Iyad Obeid, Stephen M Glass
The Balance Error Scoring System (BESS) is one of the most commonly used clinical tests to evaluate static postural stability deficits resulting from traumatic brain events and musculoskeletal injury. This test requires a trained operator to visually assess balance and give the subject a performance score based on the number of balance "errors" they committed. Despite being regularly used in several real-world situations, the BESS test is scored by clinician observation and is therefore (a) potentially susceptible to biased and inaccurate test scores and (b) cannot be administered in the absence of a trained provider...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227746/can-an-anti-gravity-treadmill-improve-stability-of-children-with-cerebral-palsy
#3
P M Birgani, M Ashtiyani, A Rasooli, M Shahrokhnia, A Shahrokhi, M M Mirbagheri, P M Birgani, M Ashtiyani, A Rasooli, M Shahrokhnia, A Shahrokhi, M M Mirbagheri, A Shahrokhi, M Shahrokhnia, A Rasooli, M M Mirbagheri, P M Birgani, M Ashtiyani
We aimed to study the effects of an anti-gravity treadmill (AlterG) training on balance and postural stability in children with cerebral palsy (CP). AlterG training was performed 3 days/week for 8 weeks, with up to 45 minutes of training per session. The subject was evaluated before and after the 8-week training. The effects of training on the balance and postural stability was evaluated based on the Romberg test that was performed by using a posturography device. The parameters quantifying Center-of-Pressure (CoP) were calculated using different analytical approaches including power spectral density and principal components analyses...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227334/human-static-postures-analysis-using-empirical-mode-decomposition
#4
Khaled Safi, Emilie Hutin, Samer Mohammed, Inke Marie Albertsen, Eric Delechelle, Yacine Amirat, Mohamad Khalil, Jean-Michel Gracies, Khaled Safi, Emilie Hutin, Samer Mohammed, Inke Marie Albertsen, Eric Delechelle, Yacine Amirat, Mohamad Khalil, Jean-Michel Gracies, Eric Delechelle, Mohamad Khalil, Inke Marie Albertsen, Jean-Michel Gracies, Emilie Hutin, Khaled Safi, Yacine Amirat, Samer Mohammed
The goal of this paper is to analyze the human stability during static postures using stabilometric signals. The effects of subject's visual input, feet position, age and gender are analyzed. Twenty eight healthy subjects have participated in this study. The center of pressure displacements were measured along the Medio-Lateral (ML) and Antero-Posterior (AP) directions. Empirical mode decomposition method is used to decompose the stabilometric signal into several elementary signals called Intrinsic Mode Functions (IMF)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226433/preliminary-results-of-residual-deficits-observed-in-athletes-with-concussion-history-combined-eeg-and-cognitive-study
#5
Tamanna T K Munia, Jeffrey L Gendreau, Ajay K Verma, Benjamin D Johnson, Mark Romanick, Kouhyar Tavakolian, Reza Fazel-Rezai, Tamanna T K Munia, Jeffrey L Gendreau, Ajay K Verma, Benjamin D Johnson, Mark Romanick, Kouhyar Tavakolian, Reza Fazel-Rezai, Reza Fazel-Rezai, Jeffrey L Gendreau, Benjamin D Johnson, Tamanna T K Munia, Ajay K Verma, Kouhyar Tavakolian, Mark Romanick
Assessment, treatment, and management of sport-related concussions are a widely recognized public health issue. Although several neuropsychological and motor assessment tools have been developed and implemented for sports teams at various levels and ages, the sensitivity of these tests has yet to be validated with more objective measures to make return-to-play (RTP) decisions more confidently. The present study sought to analyze the residual effect of concussions on a sample of adolescent athletes who sustained one or more previous concussions compared to those who had no concussion history...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226432/reinforcement-learning-for-stabilizing-an-inverted-pendulum-naturally-leads-to-intermittent-feedback-control-as-in-human-quiet-standing
#6
Kenjiro Michimoto, Yasuyuki Suzuki, Ken Kiyono, Yasushi Kobayashi, Pietro Morasso, Taishin Nomura, Kenjiro Michimoto, Yasuyuki Suzuki, Ken Kiyono, Yasushi Kobayashi, Pietro Morasso, Taishin Nomura, Ken Kiyono, Pietro Morasso, Kenjiro Michimoto, Yasushi Kobayashi, Yasuyuki Suzuki, Taishin Nomura
Intermittent feedback control for stabilizing human upright stance is a promising strategy, alternative to the standard time-continuous stiffness control. Here we show that such an intermittent controller can be established naturally through reinforcement learning. To this end, we used a single inverted pendulum model of the upright posture and a very simple reward function that gives a certain amount of punishments when the inverted pendulum falls or changes its position in the state space. We found that the acquired feedback controller exhibits hallmarks of the intermittent feedback control strategy, namely the action of the feedback controller is switched-off intermittently when the state of the pendulum is located near the stable manifold of the unstable saddle-type upright equilibrium of the inverted pendulum with no active control: this action provides an opportunity to exploit transiently converging dynamics toward the unstable upright position with no help of the active feedback control...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226425/the-brain-can-mix-different-control-strategies-in-a-task-oriented-and-multi-referential-manner-a-simulation-study
#7
Pietro Morasso, Taishin Nomura, Yasuyuki Suzuki, Jacopo Zenzeri, Pietro Morasso, Taishin Nomura, Yasuyuki Suzuki, Jacopo Zenzeri, Jacopo Zenzeri, Taishin Nomura, Yasuyuki Suzuki, Pietro Morasso
In everyday life the brain must adapt to variable situations that may require a mixture of approaches including anticipatory synergy formation, through an internal body schema, and different control strategies. Unstable tasks are particularly challenging because deteriorate the predictive power of internal models and further enhance the instability potential of delayed sensory feedback. We explore this issue by means of three simulation studies: A) The hybrid control of a double inverted pendulum model, B) The bimanual stabilization of a saddle-like instability, C) Whole-body focal-postural dynamics...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28222562/impaired-scaling-of-preparatory-postural-responses-to-repeated-balance-perturbations-in-parkinsonian-patients-with-comorbid-white-matter-disease
#8
David Cioncoloni, Lodovica Martelli, Deborah Rosignoli, Riccardo Mazzocchio
BACKGROUND: Postural instability may result from altered sequencing of automatic motor programs for anticipatory postural corrections and/or impaired motor learning in Parkinson Disease (PD) patients. Comorbid white matter disease is a major determinant of axial motor impairment, leading to poorer stability than nigrostriatal dopaminergic denervation per se. OBJECTIVE: To assess differences in anticipatory control of postural stability function between subjects affected by PD with comorbid leukoaraiosis (LPD), idiopathic Parkinson disease (IPD) and elderly health subjects (EHS) as control group...
February 10, 2017: NeuroRehabilitation
https://www.readbyqxmd.com/read/28222557/effect-of-foot-placements-during-sit-to-stand-transition-on-timed-up-and-go-test-in-stroke-subjects-a-cross-sectional-study
#9
Shreekanth D Karnad, Abraham M Joshua, Akshatha Nayak, B V Suresh, Prasanna Mithra, B Unnikrishnan
BACKGROUND & OBJECTIVE: Timed up and go (TUG) test is been used as a screening tool for the assessment of risk of falling in individuals following stroke. Though TUG test is a quick test, it has fair sensitivity compared to other tests. This study was carried out to obtain and compare test scores for different types of foot placements during sit to stand transition in stroke subjects. METHOD: A Cross-sectional study with purposive sampling included 28 post stroke subjects who were able to walk 6 meter with or without assistance...
February 8, 2017: NeuroRehabilitation
https://www.readbyqxmd.com/read/28220051/the-effect-of-vibration-exposure-during-haul-truck-operation-on-grip-strength-touch-sensation-and-balance
#10
Jonisha Pollard, William Porter, Alan Mayton, Xueyan Xu, Eric Weston
Falls from mobile equipment are reported at surface mine quarry operations each year in considerable numbers. Research shows that a preponderance of falls occur while getting on/off mobile equipment. Contributing factors to the risk of falls include the usage of ladders, exiting onto a slippery surface, and foot or hand slippage. Balance issues may also contribute to fall risks for mobile equipment operators who are exposed to whole-body vibration (WBV). For this reason, the National Institute for Occupational Safety and Health, Office of Mine Safety and Health Research conducted a study at four participating mine sites with seven haul truck operators...
January 2017: International Journal of Industrial Ergonomics
https://www.readbyqxmd.com/read/28218341/influence-of-hip-and-knee-osteoarthritis-on-dynamic-postural-control-parameters-among-older-fallers
#11
Sumaiyah Mat, Chin Teck Ng, Maw Pin Tan
OBJECTIVE: To compare the relationship between postural control and knee and hip osteoarthritis in older adults with and without a history of falls. METHODS: Fallers were those with ≥ 2 falls or 1 injurious fall over 12 months. Non-fallers were volunteers with no falls in the past year. Radiological evidence of osteoarthritis with no reported symptoms was considered "asymptomatic osteoarthritis", while "symptomatic osteoarthritis" was defined as radiographic osteoarthritis with pain or stiffness...
February 16, 2017: Journal of Rehabilitation Medicine
https://www.readbyqxmd.com/read/28217106/effect-of-noisy-galvanic-vestibular-stimulation-on-ocular-vestibular-evoked-myogenic-potentials-to-bone-conducted-vibration
#12
Shinichi Iwasaki, Shotaro Karino, Teru Kamogashira, Fumiharu Togo, Chisato Fujimoto, Yoshiharu Yamamoto, Tatsuya Yamasoba
OBJECTIVE: Galvanic vestibular stimulation (GVS) delivered as zero-mean current noise (noisy GVS) has been shown to improve static and dynamic postural stability probably by enhancing vestibular information. The purpose of this study was to examine the effect of an imperceptible level noisy GVS on ocular vestibular-evoked myogenic potentials (oVEMPs) in response to bone-conducted vibration (BCV). MATERIALS AND METHODS: oVEMPs to BCV were measured during the application of white noise GVS with an amplitude ranging from 0 to 300 µA [in root mean square (RMS)] in 20 healthy subjects...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28210066/effects-of-interactive-metronome-training-on-postural-stability-and-upper-extremity-function-in-parkinson-s-disease-a-case-study
#13
Arim Kim, Hye-Sun Lee, Chiang-Soon Song
[Purpose] The purpose of this study was to examine the effects of interactive metronome training on the postural stability and upper extremity function of an individual with Parkinson's disease. [Subject and Methods] The participant of this case study was a 75-year-old female with Parkinson's disease diagnosed 7 years prior. This study was a single-subject research with an A-B-A design. She received IM training during the treatment phase (B phase) for 40 minutes per session. She was assessed pretest and posttest using the Berg balance scale and Wolf motor function test, and at baseline and the treatment phase using the measured box-and-block test and a Tetrax system...
January 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28210027/klapp-method-effect-on-idiopathic-scoliosis-in-adolescents-blind-randomized-controlled-clinical-trial
#14
Diego De Sousa Dantas, Sanderson José Costa De Assis, Marina Pegoraro Baroni, Johnnatas Mikael Lopes, Enio Walker Azevedo Cacho, Roberta De Oliveira Cacho, Silvana Alves Pereira
[Purpose] To estimate the effect of Klapp method on idiopathic scoliosis in school students. [Subjects and Methods] A single-blind randomized clinical trial with 22 students randomly divided into intervention group (n=12) and inactive control group (n=10). Exercise protocol consisted of Klapp method, 20 sessions, three times a week for intervention group, and inactivity for control group. Dorsal muscle strength was measured by dynamometer; body asymmetries and gibbosity angles were measured by biophotogrammetry...
January 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28208991/effect-of-thoracic-correction-exercises-in-upper-body-dysfunction-of-94-year-old-male-participant-a-case-report
#15
P Senthil, S Sudhakar, R Radhakrishnan
The case report has been presented to show the effects of thoracic correction exercises on flexed posture in older men with upper body dysfunction using posture analysis software and pectoralis minor muscle length test. The present case is that of a 94-year-old male. He was guided for a specific thoracic correction exercises for 12 weeks. The program included breathing correction, thorax mobility, scapular stability and passive stretching of Pectoralis major and minor, performed thrice a week, 30 min each session, for 12 weeks...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28204720/postural-stability-in-older-adults-with-alzheimer-disease
#16
Normala Mesbah, Meredith Perry, Keith D Hill, Mandeep Kaur, Leigh Hale
No abstract text is available yet for this article.
February 16, 2017: Physical Therapy
https://www.readbyqxmd.com/read/28196139/using-data-from-the-microsoft-kinect-2-to-determine-postural-stability-in-healthy-subjects-a-feasibility-trial
#17
Behdad Dehbandi, Alexandre Barachant, Anna H Smeragliuolo, John Davis Long, Silverio Joseph Bumanlag, Victor He, Anna Lampe, David Putrino
The objective of this study was to determine whether kinematic data collected by the Microsoft Kinect 2 (MK2) could be used to quantify postural stability in healthy subjects. Twelve subjects were recruited for the project, and were instructed to perform a sequence of simple postural stability tasks. The movement sequence was performed as subjects were seated on top of a force platform, and the MK2 was positioned in front of them. This sequence of tasks was performed by each subject under three different postural conditions: "both feet on the ground" (1), "One foot off the ground" (2), and "both feet off the ground" (3)...
2017: PloS One
https://www.readbyqxmd.com/read/28194100/head-stability-and-head-trunk-coordination-in-horseback-riders-the-contribution-of-visual-information-according-to-expertise
#18
Agnès Olivier, Elise Faugloire, Laure Lejeune, Sophie Biau, Brice Isableu
Maintaining equilibrium while riding a horse is a challenging task that involves complex sensorimotor processes. We evaluated the relative contribution of visual information (static or dynamic) to horseback riders' postural stability (measured from the variability of segment position in space) and the coordination modes they adopted to regulate balance according to their level of expertise. Riders' perceptual typologies and their possible relation to postural stability were also assessed. Our main assumption was that the contribution of visual information to postural control would be reduced among expert riders in favor of vestibular and somesthetic reliance...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28192831/training-effects-of-the-fifa-11-and-harmoknee-on-several-neuromuscular-parameters-of-physical-performance-measures
#19
Francisco Ayala, Carlos Pomares-Noguera, Francisco Javier Robles-Palazón, Maria Del Pilar García-Vaquero, Ignacio Ruiz-Pérez, Sergio Hernández-Sánchez, Mark De Ste Croix
The main purpose of this study was to analyse the training effects of the FIFA 11+ and Harmoknee on several parameters of physical performance measures in youth amateur football players. 41 adolescent players were randomised within each team into 2 groups (team 1: control vs. FIFA 11+; team 2: control vs. Harmoknee). The FIFA 11+ and Harmoknee groups performed the program 3 times a week for 4 weeks; the control groups completed their usual warm-up routines. 13 physical performance measures (joint range of motion, dynamic postural control, single legged hop limb symmetry, sprint time, jumping height and agility) were assessed...
February 13, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28187057/improvements-in-gait-with-hearing-aids-and-cochlear-implants
#20
Corey S Shayman, Gammon M Earhart, Timothy E Hullar
OBJECTIVE: To evaluate whether wearing auditory assistive devices can improve gait and dynamic balance. PATIENTS: Three adult users of bilateral hearing assistive devices: one with cytomegalovirus exposure wearing cochlear implants, one with Ménière's disease wearing hearing aids, and one with presbystasis wearing hearing aids. INTERVENTION: Rehabilitative intervention involved participants performing gait and dynamic posture tasks with and without their hearing assistive devices...
February 9, 2017: Otology & Neurotology
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