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Neurodynamic

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https://www.readbyqxmd.com/read/28631166/morphology-and-the-gradient-of-a-symmetric-potential-predict-gait-transitions-of-dogs
#1
Simon Wilshin, G Clark Haynes, Jack Porteous, Daniel Koditschek, Shai Revzen, Andrew J Spence
Gaits and gait transitions play a central role in the movement of animals. Symmetry is thought to govern the structure of the nervous system, and constrain the limb motions of quadrupeds. We quantify the symmetry of dog gaits with respect to combinations of bilateral, fore-aft, and spatio-temporal symmetry groups. We tested the ability of symmetries to model motion capture data of dogs walking, trotting and transitioning between those gaits. Fully symmetric models performed comparably to asymmetric with only a [Formula: see text] increase in the residual sum of squares and only one-quarter of the parameters...
June 19, 2017: Biological Cybernetics
https://www.readbyqxmd.com/read/28623065/upper-limb-neurodynamic-test-1-in-patients-with-clinical-diagnosis-of-carpal-tunnel-syndrome-a-diagnostic-accuracy-study
#2
Maria-Constanza Trillos, Felipe Soto, Leonardo Briceno-Ayala
STUDY DESIGN: Diagnostic accuracy. INTRODUCTION: Upper limb neurodynamic test 1 (ULNT1) is used to evaluate the mechanical sensitivity especially in the peripheral nerves of the upper limbs. The reproduction of typical symptoms in the affected hand improves the estimation of the probability of carpal tunnel syndrome (CTS). However the test has not been evaluated sufficiently to determine its real usefulness. In the present study the diagnostic accuracy of ULNT1 as a clinical test for CTS was determined...
June 13, 2017: Journal of Hand Therapy: Official Journal of the American Society of Hand Therapists
https://www.readbyqxmd.com/read/28608175/reliability-and-validity-of-clinical-tests-to-assess-the-anatomical-integrity-of-the-cervical-spine-in-adults-with-neck-pain-and-its-associated-disorders-part-1-a-systematic-review-from-the-cervical-assessment-and-diagnosis-research-evaluation-cadre-collaboration
#3
REVIEW
Nadège Lemeunier, S da Silva-Oolup, N Chow, D Southerst, L Carroll, J J Wong, H Shearer, P Mastragostino, J Cox, E Côté, K Murnaghan, D Sutton, P Côté
OBJECTIVE: To determine the reliability and validity of clinical tests to assess the anatomical integrity of the cervical spine in adults with neck pain and its associated disorders. METHODS: We updated the systematic review of the 2000-2010 Bone and Joint Decade Task Force on Neck Pain and its Associated Disorders. We also searched the literature to identify studies on the reliability and validity of Doppler velocimetry for the evaluation of cervical arteries. Two independent reviewers screened and critically appraised studies...
June 12, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28603349/neural-manual-vs-robotic-assisted-mobilization-to-improve-motion-and-reduce-pain-hypersensitivity-in-hand-osteoarthritis-study-protocol-for-a-randomized-controlled-trial
#4
Jorge Hugo Villafañe, Kristin Valdes, Grace Imperio, Alberto Borboni, Raquel Cantero-Téllez, Silvia Galeri, Stefano Negrini
[Purpose] The aim of the present study is to detail the protocol for a randomised controlled trial (RCT) of neural manual vs. robotic assisted on pain in sensitivity as well as analyse the quantitative and qualitative movement of hand in subjects with hand osteoarthritis. [Subjects and Methods] Seventy-two patients, aged 50 to 90 years old of both genders, with a diagnosis of hand Osteoarthritis (OA), will be recruited. Two groups of 36 participants will receive an experimental intervention (neurodynamic mobilization intervention plus exercise) or a control intervention (robotic assisted passive mobilization plus exercise) for 12 sessions over 4 weeks...
May 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28598433/refinement-of-learned-skilled-movement-representation-in-motor-cortex-deep-output-layer
#5
Qian Li, Ho Ko, Zhong-Ming Qian, Leo Y C Yan, Danny C W Chan, Gordon Arbuthnott, Ya Ke, Wing-Ho Yung
The mechanisms underlying the emergence of learned motor skill representation in primary motor cortex (M1) are not well understood. Specifically, how motor representation in the deep output layer 5b (L5b) is shaped by motor learning remains virtually unknown. In rats undergoing motor skill training, we detect a subpopulation of task-recruited L5b neurons that not only become more movement-encoding, but their activities are also more structured and temporally aligned to motor execution with a timescale of refinement in tens-of-milliseconds...
June 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/28575736/collective-neurodynamic-optimization-for-economic-emission-dispatch-problem-considering-valve-point-effect-in-microgrid
#6
Tiancai Wang, Xing He, Tingwen Huang, Chuandong Li, Wei Zhang
The economic emission dispatch (EED) problem aims to control generation cost and reduce the impact of waste gas on the environment. It has multiple constraints and nonconvex objectives. To solve it, the collective neurodynamic optimization (CNO) method, which combines heuristic approach and projection neural network (PNN), is attempted to optimize scheduling of an electrical microgrid with ten thermal generators and minimize the plus of generation and emission cost. As the objective function has non-derivative points considering valve point effect (VPE), differential inclusion approach is employed in the PNN model introduced to deal with them...
May 15, 2017: Neural Networks: the Official Journal of the International Neural Network Society
https://www.readbyqxmd.com/read/28559951/neurodynamic-evaluation-of-hearing-aid-features-using-eeg-correlates-of-listening-effort
#7
Corinna Bernarding, Daniel J Strauss, Ronny Hannemann, Harald Seidler, Farah I Corona-Strauss
In this study, we propose a novel estimate of listening effort using electroencephalographic data. This method is a translation of our past findings, gained from the evoked electroencephalographic activity, to the oscillatory EEG activity. To test this technique, electroencephalographic data from experienced hearing aid users with moderate hearing loss were recorded, wearing hearing aids. The investigated hearing aid settings were: a directional microphone combined with a noise reduction algorithm in a medium and a strong setting, the noise reduction setting turned off, and a setting using omnidirectional microphones without any noise reduction...
June 2017: Cognitive Neurodynamics
https://www.readbyqxmd.com/read/28559668/effect-of-leg-dominance-gender-and-age-on-sensory-responses-to-structural-differentiation-of-straight-leg-raise-test-in-asymptomatic-subjects-a-cross-sectional-study
#8
Eva Sierra-Silvestre, María Torres Lacomba, Pedro de la Villa Polo
STUDY DESIGN: Cross-sectional study. OBJECTIVES: To assess the effect of structural differentiation on sensory responses of asymptomatic individuals to standard neurodynamic tests of straight leg raise (SLR) and to evaluate the relevance of leg dominance, gender, and age. BACKGROUND: SLR test is a well-known neurodynamic test among physical therapists; no studies to date have investigated the influence of gender, age, and leg dominance to the sensory responses of this neurodynamic test and its structured differentiating maneuver...
May 2017: Journal of Manual & Manipulative Therapy
https://www.readbyqxmd.com/read/28512438/are-neurodynamic-organizations-a-fundamental-property-of-teamwork
#9
Ronald H Stevens, Trysha L Galloway
When performing a task it is important for teams to optimize their strategies and actions to maximize value and avoid the cost of surprise. The decisions teams make sometimes have unintended consequences and they must then reorganize their thinking, roles and/or configuration into corrective structures more appropriate for the situation. In this study we ask: What are the neurodynamic properties of these reorganizations and how do they relate to the moment-by-moment, and longer, performance-outcomes of teams?...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28405191/cognitive-architecture-with-evolutionary-dynamics-solves-insight-problem
#10
Anna Fedor, István Zachar, András Szilágyi, Michael Öllinger, Harold P de Vladar, Eörs Szathmáry
In this paper, we show that a neurally implemented a cognitive architecture with evolutionary dynamics can solve the four-tree problem. Our model, called Darwinian Neurodynamics, assumes that the unconscious mechanism of problem solving during insight tasks is a Darwinian process. It is based on the evolution of patterns that represent candidate solutions to a problem, and are stored and reproduced by a population of attractor networks. In our first experiment, we used human data as a benchmark and showed that the model behaves comparably to humans: it shows an improvement in performance if it is pretrained and primed appropriately, just like human participants in Kershaw et al...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28395984/efficacy-of-manual-therapy-including-neurodynamic-techniques-for-the-treatment-of-carpal-tunnel-syndrome-a-randomized-controlled-trial
#11
Tomasz Wolny, Edward Saulicz, Paweł Linek, Michael Shacklock, Andrzej Myśliwiec
OBJECTIVE: The purpose of this randomized trial was to compare the efficacy of manual therapy, including the use of neurodynamic techniques, with electrophysical modalities on patients with mild and moderate carpal tunnel syndrome (CTS). METHODS: The study included 140 CTS patients who were randomly assigned to the manual therapy (MT) group, which included the use of neurodynamic techniques, functional massage, and carpal bone mobilizations techniques, or to the electrophysical modalities (EM) group, which included laser and ultrasound therapy...
April 8, 2017: Journal of Manipulative and Physiological Therapeutics
https://www.readbyqxmd.com/read/28385623/how-can-a-recurrent-neurodynamic-predictive-coding-model-cope-with-fluctuation-in-temporal-patterns-robotic-experiments-on-imitative-interaction
#12
Ahmadreza Ahmadi, Jun Tani
The current paper examines how a recurrent neural network (RNN) model using a dynamic predictive coding scheme can cope with fluctuations in temporal patterns through generalization in learning. The conjecture driving this present inquiry is that a RNN model with multiple timescales (MTRNN) learns by extracting patterns of change from observed temporal patterns, developing an internal dynamic structure such that variance in initial internal states account for modulations in corresponding observed patterns. We trained a MTRNN with low-dimensional temporal patterns, and assessed performance on an imitation task employing these patterns...
August 2017: Neural Networks: the Official Journal of the International Neural Network Society
https://www.readbyqxmd.com/read/28345282/neuroplasticity-of-language-in-left-hemisphere-stroke-evidence-linking-subsecond-electrophysiology-and-structural-connections
#13
Vitória Piai, Lars Meyer, Nina F Dronkers, Robert T Knight
The understanding of neuroplasticity following stroke is predominantly based on neuroimaging measures that cannot address the subsecond neurodynamics of impaired language processing. We combined behavioral and electrophysiological measures and structural-connectivity estimates to characterize neuroplasticity underlying successful compensation of language abilities after left-hemispheric stroke. We recorded the electroencephalogram from patients with stroke lesions to the left temporal lobe and from matched controls during context-driven word retrieval...
June 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28319883/the-influence-of-a-depressed-scapular-alignment-on-upper-limb-neural-tissue-mechanosensitivity-and-local-pressure-pain-sensitivity
#14
Patricia Martínez-Merinero, Enriqe Lluch, Tomas Gallezo-Izquierdo, Daniel Pecos-Martín, Gustavo Plaza-Manzano, Susana Nuñez-Nagy, Deborah Falla
BACKGROUND: A depressed scapular alignment could lead to prolonged and repetitive stress or compression of the brachial plexus, resulting in sensitization of neural tissue. However, no study has investigated the influence of alignment of the scapulae on sensitization of upper limb neural tissue in otherwise asymptomatic people. In this case-control study, we investigate the influence of a depressed scapular alignment on mechanosensitivity of the upper limb peripheral nervous system as well as pressure pain thresholds (PPT)...
June 2017: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/28287988/output-feedback-based-boundary-control-of-uncertain-coupled-semilinear-parabolic-pde-using-neurodynamic-programming
#15
Behzad Talaei, Sarangapani Jagannathan, John Singler
In this paper, neurodynamic programming-based output feedback boundary control of distributed parameter systems governed by uncertain coupled semilinear parabolic partial differential equations (PDEs) under Neumann or Dirichlet boundary control conditions is introduced. First, Hamilton-Jacobi-Bellman (HJB) equation is formulated in the original PDE domain and the optimal control policy is derived using the value functional as the solution of the HJB equation. Subsequently, a novel observer is developed to estimate the system states given the uncertain nonlinearity in PDE dynamics and measured outputs...
March 6, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28286626/periodic-lateralized-epileptiform-discharges-can-survive-anesthesia-and-result-in-asymmetric-drug-induced-burst-suppression
#16
Edward C Mader, Louis A Cannizzaro, Frank J Williams, Saurabh Lalan, Piotr W Olejniczak
Drug-induced burst suppression (DIBS) is bihemispheric and bisymmetric in adults and older children. However, asymmetric DIBS may occur if a pathological process is affecting one hemisphere only or both hemispheres disproportionately. The usual suspect is a destructive lesion; an irritative or epileptogenic lesion is usually not invoked to explain DIBS asymmetry. We report the case of a 66-year-old woman with new-onset seizures who was found to have a hemorrhagic cavernoma and periodic lateralized epileptiform discharges (PLEDs) in the right temporal region...
February 20, 2017: Neurology International
https://www.readbyqxmd.com/read/28285487/load-carriage-related-paresthesias-part-2-meralgia-paresthetica
#17
REVIEW
Joseph J Knapik, Katy Reynolds, Robin Orr, Rodney Pope
This is the second of a two-part series addressing symptoms, evaluation, and treatment of load carriage- related paresthesias. Part 1 addressed rucksack palsy and digitalgia paresthetica; here, meralgia paresthetica (MP) is discussed. MP is a mononeuropathy involving the lateral femoral cutaneous nerve (LFCN). MP has been reported in load carriage situations where the LFCN was compressed by rucksack hipbelts, pistol belts, parachute harnesses, and body armor. In the US military, the rate of MP is 6.2 cases/10,000 personyears...
December 0: Journal of Special Operations Medicine: a Peer Reviewed Journal for SOF Medical Professionals
https://www.readbyqxmd.com/read/28238938/estimating-direction-in-brain-behavior-interactions-proactive-and-reactive-brain-states-in-driving
#18
Javier O Garcia, Justin Brooks, Scott Kerick, Tony Johnson, Tim R Mullen, Jean M Vettel
Conventional neuroimaging analyses have ascribed function to particular brain regions, exploiting the power of the subtraction technique in fMRI and event-related potential analyses in EEG. Moving beyond this convention, many researchers have begun exploring network-based neurodynamics and coordination between brain regions as a function of behavioral parameters or environmental statistics; however, most approaches average evoked activity across the experimental session to study task-dependent networks. Here, we examined on-going oscillatory activity as measured with EEG and use a methodology to estimate directionality in brain-behavior interactions...
February 22, 2017: NeuroImage
https://www.readbyqxmd.com/read/28217092/neurodynamics-in-the-sensorimotor-loop-representing-behavior-relevant-external-situations
#19
Frank Pasemann
In the context of the dynamical system approach to cognition and supposing that brains or brain-like systems controlling the behavior of autonomous systems are permanently driven by their sensor signals, the paper approaches the question of neurodynamics in the sensorimotor loop in a purely formal way. This is carefully done by addressing the problem in three steps, using the time-discrete dynamics of standard neural networks and a fiber space representation for better clearness. Furthermore, concepts like meta-transients, parametric stability and dynamical forms are introduced, where meta-transients describe the effect of realistic sensor inputs, parametric stability refers to a class of sensor inputs all generating the "same type" of dynamic behavior, and a dynamical form comprises the corresponding class of parametrized dynamical systems...
2017: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/28212073/a-two-time-scale-neurodynamic-approach-to-constrained-minimax-optimization
#20
Xinyi Le, Jun Wang
This paper presents a two-time-scale neurodynamic approach to constrained minimax optimization using two coupled neural networks. One of the recurrent neural networks is used for minimizing the objective function and another is used for maximization. It is shown that the coupled neurodynamic systems operating in two different time scales work well for minimax optimization. The effectiveness and characteristics of the proposed approach are illustrated using several examples. Furthermore, the proposed approach is applied for H∞ model predictive control...
March 2017: IEEE Transactions on Neural Networks and Learning Systems
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