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https://www.readbyqxmd.com/read/29588022/use-of-whole-body-vibration-in-individuals-with-chronic-stroke-transmissibility-and-signal-purity
#1
Meizhen Huang, Chak-Yin Tang, Marco Y C Pang
This study examined (1) the influence of whole body vibration (WBV) frequency (20 Hz, 30 Hz, 40 Hz), amplitude (low: 0.8 mm and high: 1.5 mm) and body postures (high-squat, deep-squat, tip-toe standing) on WBV transmissibility and signal purity, and (2) the relationship between stroke motor impairment and WBV transmissibility/signal purity. Thirty-four participants with chronic stroke were tested under 18 different conditions with unique combinations of WBV frequency, amplitude, and body posture. Lower limb motor function and muscle spasticity were assessed using the Fugl-Meyer Assessment and Modified Ashworth Scale respectively...
March 17, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29482834/data-driven-adaptive-fractional-order-pi-control-for-pmsm-servo-system-with-measurement-noise-and-data-dropouts
#2
Yuanlong Xie, Xiaoqi Tang, Bao Song, Xiangdong Zhou, Yixuan Guo
In this paper, data-driven adaptive fractional order proportional integral (AFOPI) control is presented for permanent magnet synchronous motor (PMSM) servo system perturbed by measurement noise and data dropouts. The proposed method directly exploits the closed-loop process data for the AFOPI controller design under unknown noise distribution and data missing probability. Firstly, the proposed method constructs the AFOPI controller tuning problem as a parameter identification problem using the modified lp norm virtual reference feedback tuning (VRFT)...
February 23, 2018: ISA Transactions
https://www.readbyqxmd.com/read/29414537/an-optimal-control-strategy-for-hybrid-actuator-systems-application-to-an-artificial-muscle-with-electric-motor-assist
#3
Koji Ishihara, Jun Morimoto
Humans use multiple muscles to generate such joint movements as an elbow motion. With multiple lightweight and compliant actuators, joint movements can also be efficiently generated. Similarly, robots can use multiple actuators to efficiently generate a one degree of freedom movement. For this movement, the desired joint torque must be properly distributed to each actuator. One approach to cope with this torque distribution problem is an optimal control method. However, solving the optimal control problem at each control time step has not been deemed a practical approach due to its large computational burden...
January 11, 2018: Neural Networks: the Official Journal of the International Neural Network Society
https://www.readbyqxmd.com/read/29354924/-discussion-on-the-clinical-treatment-of-infantile-cerebral-palsy-with-the-differentiated-intervention-of-meridian-points-on-the-spine-and-back
#4
Cheng Zhang, Xuefeng Wang, Guangliang Jia, Tian Yang
In view of the literature study and clinical practice, the rules of the distribution, the general function and the indication of the meridians points on the spine and back were explored. The TCM mechanism on the rehabilitation of infantile cerebral palsy was studied. The rules of acupoint combination on the spine and back were summarized with meridians, main points and supplementary points involved in the TCM rehabilitation of infantile cerebral palsy. In view of the theoretic study, the advantages on the early infantile motor function, such as body turning, sitting, standing and walking, were analyzed with the long-term intervention of meridian points on the spine and back...
September 12, 2017: Zhongguo Zhen Jiu, Chinese Acupuncture & Moxibustion
https://www.readbyqxmd.com/read/29282542/using-hidden-markov-models-to-characterise-intermittent-social-behaviour-in-fish-shoals
#5
Nikolai W F Bode, Michael J Seitz
The movement of animals in groups is widespread in nature. Understanding this phenomenon presents an important problem in ecology with many applications that range from conservation to robotics. Underlying all group movements are interactions between individual animals and it is therefore crucial to understand the mechanisms of this social behaviour. To date, despite promising methodological developments, there are few applications to data of practical statistical techniques that inferentially investigate the extent and nature of social interactions in group movement...
December 27, 2017: Die Naturwissenschaften
https://www.readbyqxmd.com/read/29273309/the-satisfactory-growth-and-development-at-2-years-of-age-of-the-intergrowth-21-st-fetal-growth-standards-cohort-support-its-appropriateness-for-constructing-international-standards
#6
José Villar, Leila Cheikh Ismail, Eleonora Staines Urias, Francesca Giuliani, Eric O Ohuma, Cesar G Victora, Aris T Papageorghiou, Douglas G Altman, Cutberto Garza, Fernando C Barros, Fabien Puglia, Roseline Ochieng, Yasmin A Jaffer, Julia A Noble, Enrico Bertino, Manorama Purwar, Ruyan Pang, Ann Lambert, Cameron Chumlea, Alan Stein, Michelle Fernandes, Zulfiqar A Bhutta, Stephen H Kennedy
BACKGROUND: The World Health Organization recommends that human growth should be monitored with the use of international standards. However, in obstetric practice, we continue to monitor fetal growth using numerous local charts or equations that are based on different populations for each body structure. Consistent with World Health Organization recommendations, the INTERGROWTH-21st Project has produced the first set of international standards to date pregnancies; to monitor fetal growth, estimated fetal weight, Doppler measures, and brain structures; to measure uterine growth, maternal nutrition, newborn infant size, and body composition; and to assess the postnatal growth of preterm babies...
February 2018: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29220616/interventions-to-improve-or-maintain-lower-limb-function-among-ambulatory-adolescents-with-cerebral-palsy-a-cross-sectional-survey-of-current-practice-in-the-uk
#7
Gerasimos Taflampas, Cherry Kilbride, Wendy Levin, Grace Lavelle, Jennifer M Ryan
OBJECTIVES: To describe physiotherapy management to improve or maintain lower-limb function among adolescents with cerebral palsy, classified in Gross Motor Function Classification System levels I-III, in the United Kingdom (UK). METHODS: A list of interventions was identified using a nominal group technique and developed into a survey, which was distributed to approximately 2,100 pediatric physiotherapists in the UK through the Association of Pediatric Chartered Physiotherapists and a private physiotherapy clinic in London between April and June 2015...
December 8, 2017: Physical & Occupational Therapy in Pediatrics
https://www.readbyqxmd.com/read/29192609/superior-arm-movement-decoding-from-cortex-with-a-new-unsupervised-learning-algorithm
#8
Joseph G Makin, Joseph E O'Doherty, Mariana M B Cardoso, Philip N Sabes
OBJECTIVE: The aim of this work is to improve the state of the art for motor-control with a brain-machine interface (BMI). BMIs use neurological recording devices and decoding algorithms to transform brain activity directly into real-time control of a machine, archetypically a robotic arm or a cursor. The standard procedure treats neural activity-vectors of spike counts in small temporal windows-as noisy observations of the kinematic state (position, velocity, acceleration) of the fingertip...
April 2018: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29184533/correlations-between-motor-symptoms-across-different-motor-tasks-quantified-via-random-forest-feature-classification-in-parkinson-s-disease
#9
Andreas Kuhner, Tobias Schubert, Massimo Cenciarini, Isabella Katharina Wiesmeier, Volker Arnd Coenen, Wolfram Burgard, Cornelius Weiller, Christoph Maurer
Background: Objective assessments of Parkinson's disease (PD) patients' motor state using motion capture techniques are still rarely used in clinical practice, even though they may improve clinical management. One major obstacle relates to the large dimensionality of motor abnormalities in PD. We aimed to extract global motor performance measures covering different everyday motor tasks, as a function of a clinical intervention, i.e., deep brain stimulation (DBS) of the subthalamic nucleus...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28991677/hurst-revisited-are-symptoms-and-signs-of-functional-motor-and-sensory-disorders-dependent-on-idea
#10
Jon Stone, Jennifer Mutch, Denis Giannokous, Ingrid Hoeritzauer, Alan Carson
INTRODUCTION: Symptoms and signs of functional (psychogenic) motor and sensory disorder are often said to be dependent on the patients' idea of what symptoms should be, rather than anatomy and physiology. This hypothesis has however rarely been tested. MATERIALS AND METHODS: Inspired by a brief experiment carried out in 1919 by neurologist Arthur Hurst we aimed to assess the views of healthy non-medical adults towards paralysis and numbness and their response to tests for functional disorders when asked to pretend to have motor and sensory symptoms...
October 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28964079/measuring-vocal-motor-skill-with-a-virtual-voice-controlled-slingshot
#11
Jarrad H Van Stan, Se-Woong Park, Matthew Jarvis, Daryush D Mehta, Robert E Hillman, Dagmar Sternad
Successful voice training (e.g., singing lessons) and vocal rehabilitation (e.g., therapy for a voice disorder) involve learning complex, vocal behaviors. However, there are no metrics describing how humans learn new vocal skills or predicting how long the improved behavior will persist post-therapy. To develop measures capable of describing and predicting vocal motor learning, a theory-based paradigm from limb motor control inspired the development of a virtual task where subjects throw projectiles at a target via modifications in vocal pitch and loudness...
September 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28928667/thirty-five-day-fluoxetine-treatment-limits-sensory-motor-deficit-and-biochemical-disorders-in-a-rat-model-of-decompression-sickness
#12
Caroline Cosnard, Sébastien De Maistre, Jacques H Abraini, Laurent Chazalviel, Jean-Eric Blatteau, Jean-Jacques Risso, Nicolas Vallée
According to the OECD statistical base for 2014, anti-depressants will, on average, be distributed at a rate of 62 daily doses per 1,000 inhabitants for the 25 countries surveyed (Health at a glance: Europe 2014; OECD Health Statistics; World Health Organization and OECD Health Statistics, 2014). Divers must be concerned. On another hand, divers are potentially exposed to decompression sickness including coagulation inflammation and ischemia, which can result in neurological lesions or even death. The purpose of this study is to assess whether chronic treatment with anti-depressants may represent a contraindication to the practice of an at-risk activity, such as, scuba diving, or even presents a benefit by attenuating the severity of the symptoms...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28843540/pattern-component-modeling-a-flexible-approach-for-understanding-the-representational-structure-of-brain-activity-patterns
#13
REVIEW
Jörn Diedrichsen, Atsushi Yokoi, Spencer A Arbuckle
Representational models specify how complex patterns of neural activity relate to visual stimuli, motor actions, or abstract thoughts. Here we review pattern component modeling (PCM), a practical Bayesian approach for evaluating such models. Similar to encoding models, PCM evaluates the ability of models to predict novel brain activity patterns. In contrast to encoding models, however, the activity of individual voxels across conditions (activity profiles) are not directly fitted. Rather, PCM integrates over all possible activity profiles and computes the marginal likelihood of the data under the activity profile distribution specified by the representational model...
August 24, 2017: NeuroImage
https://www.readbyqxmd.com/read/28839278/electrical-performance-of-lightweight-cnt-cu-composite-wires-impacted-by-surface-and-internal-cu-spatial-distribution
#14
Rajyashree Sundaram, Takeo Yamada, Kenji Hata, Atsuko Sekiguchi
We report ultralong conducting lightweight multiwall carbon nanotube (MWCNT)-Cu composite wires with MWCNTs uniformly distributed in a continuous Cu matrix throughout. With a high MWCNT vol% (40-45%), the MWCNT-Cu wire density was 2/3(rd) that of Cu. Our composite wires show manufacturing potential because we used industrially compatible Cu electrodeposition protocols on commercial CNT wires. Further, we systematically varied Cu spatial distribution on the composite wire surface and bulk and measured the associated electrical performance, including resistivity (ρ), temperature dependence of resistance, and stability to current (measured as current carrying capacity, CCC in vacuum)...
August 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28813881/simulation-of-variable-impedance-as-an-intervention-for-upper-extremity-motor-exploration
#15
Felix C Huang
Current methods in robot-assisted therapy are limited in providing predictions of the effectiveness of interventions. Our approach focuses on how robotic interaction can impact the distribution of movements expressed in the arm. Using data from a previous study with stroke survivors (n=10), we performed simulations to examine how changes in hand endpoint impedance would alter exploratory motion. We present methods for designing a custom training intervention, by relating the desired change in acceleration covariance in planar motion with a corresponding change in inertia matrix...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28809057/understanding-frames-a-uk-survey-of-parents-and-professionals-regarding-the-use-of-standing-frames-for-children-with-cerebral-palsy
#16
J Goodwin, A Colver, A Basu, S Crombie, D Howel, J R Parr, E McColl, N Kolehmainen, A Roberts, J Lecouturier, J Smith, K Miller, J Cadwgan
BACKGROUND: Standing frames are used for children with cerebral palsy (CP). They may improve body structure and function (e.g., reducing risk of hip subluxation, and improving bladder and bowel function), improving activity (e.g., motor abilities) and participation (e.g., interaction with peers), but there is little evidence that they do. We aimed to identify current UK standing frame practice for children with CP and to understand stakeholder views regarding their clinical benefits and challenges to use...
August 15, 2017: Child: Care, Health and Development
https://www.readbyqxmd.com/read/28800631/lack-of-spacing-effects-during-piano-learning
#17
Melody Wiseheart, Annalise A D'Souza, Jacey Chae
Spacing effects during retention of verbal information are easily obtained, and the effect size is large. Relatively little evidence exists on whether motor skill retention benefits from distributed practice, with even less evidence on complex motor skills. We taught a 17-note musical sequence on a piano to individuals without prior formal training. There were five lags between learning episodes: 0-, 1-, 5-, 10-, and 15-min. After a 5-min retention interval, participants' performance was measured using three criteria: accuracy of note playing, consistency in pressure applied to the keys, and consistency in timing...
2017: PloS One
https://www.readbyqxmd.com/read/28744231/understanding-and-modeling-teams-as-dynamical-systems
#18
REVIEW
Jamie C Gorman, Terri A Dunbar, David Grimm, Christina L Gipson
By its very nature, much of teamwork is distributed across, and not stored within, interdependent people working toward a common goal. In this light, we advocate a systems perspective on teamwork that is based on general coordination principles that are not limited to cognitive, motor, and physiological levels of explanation within the individual. In this article, we present a framework for understanding and modeling teams as dynamical systems and review our empirical findings on teams as dynamical systems...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28731841/survey-of-nutrition-management-practices-in-centers-for-pediatric-intestinal-rehabilitation
#19
Anita M Nucci, Kipp Ellsworth, Austin Michalski, Emily Nagel, Jackie Wessel
BACKGROUND: Nutrition management of pediatric intestinal failure (IF) requires interdisciplinary coordination of parenteral nutrition (PN) and enteral nutrition (EN) support. Nutrition strategies used by specialists in pediatric intestinal rehabilitation to promote gut adaptation and manage complications have not been previously summarized. METHODS: A practice survey was distributed to members of the dietitian subgroup of the American Society for Parenteral and Enteral Nutrition Pediatric Intestinal Failure Section...
July 1, 2017: Nutrition in Clinical Practice
https://www.readbyqxmd.com/read/28674847/a-new-integrated-dual-time-point-amyloid-pet-mri-data-analysis-method
#20
Diego Cecchin, Henryk Barthel, Davide Poggiali, Annachiara Cagnin, Solveig Tiepolt, Pietro Zucchetta, Paolo Turco, Paolo Gallo, Anna Chiara Frigo, Osama Sabri, Franco Bui
PURPOSE: In the initial evaluation of patients with suspected dementia and Alzheimer's disease, there is no consensus on how to perform semiquantification of amyloid in such a way that it: (1) facilitates visual qualitative interpretation, (2) takes the kinetic behaviour of the tracer into consideration particularly with regard to at least partially correcting for blood flow dependence, (3) analyses the amyloid load based on accurate parcellation of cortical and subcortical areas, (4) includes partial volume effect correction (PVEC), (5) includes MRI-derived topographical indexes, (6) enables application to PET/MRI images and PET/CT images with separately acquired MR images, and (7) allows automation...
November 2017: European Journal of Nuclear Medicine and Molecular Imaging
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