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https://www.readbyqxmd.com/read/28227888/simulating-the-activation-contraction-and-movement-of-skeletal-muscles-using-the-bidomain-model
#1
A Lopez Rincon, C Cantu, R Soto, S Shimoda, A Lopez Rincon, C Cantu, R Soto, S Shimoda, A Lopez Rincon, R Soto, C Cantu, S Shimoda
A simulation of the muscle activation, contraction and movement is here presented. This system was developed based on the Bidomain mathematical model of the electrical propagation in muscles. This study shows an electrical stimuli input to a muscle and how this behave. The comparison between healthy subject and patient with muscle activation impairment is depicted, depending on whether the signal reaches a threshold. A 3D model of a bicep muscle and a forearm bone connected was constructed using OpenGL. This platform could be used for development of controllers for biomechatronic systems in future works...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227840/virtual-reality-for-pediatric-neuro-rehabilitation-adaptive-visual-feedback-of-movement-to-engage-the-mirror-neuron-system
#2
Roopeswar Kommalapati, Konstantinos P Michmizos, Roopeswar Kommalapati, Konstantinos P Michmizos, Roopeswar Kommalapati, Konstantinos P Michmizos
Sensorimotor therapy gives optimal results when patients are cognitively engaged into highly repetitive tasks, a goal that most children find hard to pursue. This paper presents the key developments of our ongoing effort to design an interactive rehabilitation environment that motivates physically impaired children throughout their therapy. The continuous motivation is achieved by the system adapting fundamental therapeutic components to the performance of each child. The relevant movement is mirrored to an animated character projected in front of the child...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227740/influence-of-force-feedback-on-grasp-force-modulation-in-prosthetic-applications-a-preliminary-study
#3
Sasha B Godfrey, Matteo Bianchi, Antonio Bicchi, Marco Santello, Sasha B Godfrey, Matteo Bianchi, Antonio Bicchi, Marco Santello, Marco Santello, Antonio Bicchi, Sasha B Godfrey, Matteo Bianchi
In typical movement, humans use a combination of feed-forward and feedback motor control strategies to interact with the world around them. However, when sensory input is impaired or absent, as in the case of various neuropathies or amputation, the ability to perform everyday tasks, like modulating grip force to object weight, can be affected. In this study, we show the results of a preliminary study using a pressure cuff-like force feedback device (CUFF) with the SoftHand Pro (SHP) prosthetic hand. Subjects lifted an object of various weights using their own hand, with the SHP without feedback, and the SHP with force feedback...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227091/hybrid-bci-approach-to-control-an-artificial-tibio-femoral-joint
#4
Luis Mercado, Angel Rodriguez-Linan, Luis M Torres-Trevino, G Quiroz, Luis Mercado, Angel Rodriguez-Linan, Luis M Torres-Trevino, G Quiroz, Luis Mercado, Angel Rodriguez-Linan, Luis M Torres-Trevino, G Quiroz
Brain-Computer Interfaces (BCIs) for disabled people should allow them to use their remaining functionalities as control possibilities. BCIs connect the brain with external devices to perform the volition or intent of movement, regardless if that individual is unable to perform the task due to body impairments. In this work we fuse electromyographic (EMG) with electroencephalographic (EEG) activity in a framework called "Hybrid-BCI" (hBCI) approach to control the movement of a simulated tibio-femoral joint...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226989/a-novel-portable-low-cost-kinect-based-system-for-motion-analysis-in-neurological-diseases
#5
Joao Paulo Silva Cunha, Ana Patricia Rocha, Hugo Miguel Pereira Choupina, Jose Maria Fernandes, Maria Jose Rosas, Rui Vaz, Felix Achilles, Anna Mira Loesch, Christian Vollmar, Elisabeth Hartl, Soheyl Noachtar, Joao Paulo Silva Cunha, Ana Patricia Rocha, Hugo Miguel Pereira Choupina, Jose Maria Fernandes, Maria Jose Rosas, Rui Vaz, Felix Achilles, Anna Mira Loesch, Christian Vollmar, Elisabeth Hartl, Soheyl Noachtar, Christian Vollmar, Ana Patricia Rocha, Elisabeth Hartl, Rui Vaz, Hugo Miguel Pereira Choupina, Soheyl Noachtar, Felix Achilles, Anna Mira Loesch, Jose Maria Fernandes, Joao Paulo Silva Cunha, Maria Jose Rosas
Many neurological diseases, such as Parkinson's disease and epilepsy, can significantly impair the motor function of the patients, often leading to a dramatic loss of their quality of life. Human motion analysis is regarded as fundamental towards an early diagnosis and enhanced follow-up in this type of diseases. In this contribution, we present NeuroKinect, a novel system designed for motion analysis in neurological diseases. This system includes an RGB-D camera (Microsoft Kinect) and two integrated software applications, KiT (KinecTracker) and KiMA (Kinect Motion Analyzer)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226939/model-based-assistance-as-needed-for-robotic-movement-therapy-after-stroke
#6
Hossein Taheri, David J Reinkensmeyer, Eric T Wolbrecht, Hossein Taheri, David J Reinkensmeyer, Eric T Wolbrecht, Eric T Wolbrecht, David J Reinkensmeyer, Hosoein Taheri
This paper extends an adaptive control approach for robotic movement therapy that learns deficiencies in a patient's neuromuscular output and assists accordingly. In this method, adaptation is based on trajectory tracking error and a model of unimpaired motor control forces. The controller presented here adaptively learns and fills the gaps in the patient's ability to generate inertial forces, instead of just static forces, as has been proposed before. To test this method, a two dimensional model of an impaired human arm was used to simulate reaching movements in the horizontal plane...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226801/electrocorticographic-signals-comparison-in-sensorimotor-cortex-between-contralateral-and-ipsilateral-hand-movements
#7
Yile Jin, Mingwei Lu, Xiaotian Wang, Shaomin Zhang, Junming Zhu, Xiaoxiang Zheng, Yile Jin, Mingwei Lu, Xiaotian Wang, Shaomin Zhang, Junming Zhu, Xiaoxiang Zheng
Brain machine interfaces (BMIs) have emerged as a technology to restore lost functionality in motor impaired patients. Most BMI systems employed neural signals from contralateral hemisphere. But many studies have also demonstrated the possibility to control hand movement using signals from ipsilateral one. However, the relationship of neural signals in sensorimotor cortex between contralateral and ipsilateral hand movement control is still unclear. In this study, the electrocorticographic signals (ECoG) of sensorimotor cortex were analyzed in two epilepsy participants when they performed a visual guided rock-scissors-paper task by using contralateral and ipsilateral hand respectively...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226635/relationship-between-dynamical-characteristics-of-sit-to-walk-motion-and-physical-functions-of-elderly-humans
#8
Shengyun Liang, Yunkun Ning, Gaosheng Xie, Lei Wang, Xing Gao, Yingnan Ma, Guoru Zhao, Shengyun Liang, Yunkun Ning, Gaosheng Xie, Lei Wang, Xing Gao, Yingnan Ma, Guoru Zhao, Yingnan Ma, Yunkun Ning, Shengyun Liang, Xing Gao, Gaosheng Xie, Guoru Zhao, Lei Wang
Sit-to-walk (STW) motion is essential for daily activities. Falls frequently occur, when there is impaired ability to perform STW movements. This study investigated the relationships between the dynamical characteristics of STW motion and physical functions of elderly people. 128 elderly (51 males and 77 females, above 65 years) participated in this study. Participants were instructed to perform STW motion at comfortable state and classified into four groups (normal, mild, moderate and severe group) based on physical function, which evaluated with functional reach test and dynamic gait test...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226423/simple-emg-driven-musculoskeletal-model-enables-consistent-control-performance-during-path-tracing-tasks
#9
Dustin Crouch, He Huang, Dustin Crouch, He Huang, Dustin Crouch, He Huang
Consistent, robust performance is critical for the utility and user-acceptance of neurally-controlled powered upper limb prostheses. We preliminarily evaluated the performance consistency of an electromyography (EMG)-driven controller based on a two degree-of-freedom musculoskeletal hand model, whose simplified structure is more practical for real-time prosthesis control than existing, complex models. Parameters of four virtual muscles were computed by numerical optimization from an able-bodied subject's kinematic and EMG data collected during wrist and metacarpophalangeal (MCP) flexion/extension movements...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226309/the-feasibility-of-singing-to-improve-gait-in-parkinson-disease
#10
Elinor C Harrison, Marie E McNeely, Gammon M Earhart
Brain regions important for controlling movement are also responsible for rhythmic processing. In Parkinson disease (PD), defective internal timing within the brain has been linked to impaired beat discrimination, and may contribute to a loss of ability to maintain a steady gait rhythm. Less rhythmic gait is inherently less efficient, and this may lead to gait impairment including reduced speed, cadence, and stride length, as well as increased variability. While external rhythmic auditory stimulation (e.g. a metronome beat) is well-established as an effective tool to stabilize gait in PD, little is known about whether self-generated cues such as singing have the same beneficial effect on gait in PD...
February 14, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28225561/flotillins-control-zebrafish-epiboly-through-their-role-in-cadherin-mediated-cell-cell-adhesion
#11
Eduardo A Rios Morris, Stéphane Bodin, Bénédicte Delaval, Franck Comunale, Virginie Georget, Manoel L Costa, Georges Lutfalla, Cécile Gauthier-Rouvière
Zebrafish gastrulation and particularly epiboly that involves coordinated movements of several cell layers is a dynamic process for which regulators remain to be identified. We show here that Flotillin 1 and 2, ubiquitous and highly conserved proteins, are required for epiboly. Flotillins knockdown compromised embryo survival, strongly delayed epiboly and impaired deep cell radial intercalation and directed collective migration without affecting enveloping layer cell movement. At the molecular level, we identified that Flotillins are required for the formation of E-cadherin-mediated cell-cell junctions...
February 22, 2017: Biology of the Cell
https://www.readbyqxmd.com/read/28224328/the-parkinson-s-disease-cognitive-rating-scale-pd-crs-normative-values-from-268-healthy-italian-individuals
#12
Gabriella Santangelo, Giovanna Lagravinese, Valeria Battini, Carlo Chiorri, Mattia Siciliano, Giovanni Abbruzzese, Carmine Vitale, Paolo Barone
The Parkinson's Disease-Cognitive Rating Scale (PD-CRS) is a cognitive screening battery that includes subtests to assess cortical and subcortical functions. It is a valid screening tool for mild cognitive impairment (MCI) in Parkinson's disease (PD) and is recommended for diagnosing PD-MCI-Level I. Until now, no study has provided population-based norms for the Italian population. The aim of the present study was to collect normative values in a sample of Italian healthy subjects. Two hundred and sixty-eight (125 men) participants of different ages (age range 30-79 years) and educational levels (from primary school to university) underwent the PD-CRS...
February 21, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28223949/how-you-move-is-what-i-see-planning-an-action-biases-a-partner-s-visual-search
#13
Dominik Dötsch, Cordula Vesper, Anna Schubö
Activating action representations can modulate perceptual processing of action-relevant dimensions, indicative of a common-coding of perception and action. When two or more agents work together in joint action, individual agents often need to consider not only their own actions and their effects on the world, but also predict the actions of a co-acting partner. If in these situations the action of a partner is represented in a functionally equivalent way to the agent's own actions, one may also expect interaction effects between action and perception across jointly acting individuals...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28223927/effects-of-stroke-on-ipsilesional-end-effector-kinematics-in-a-multi-step-activity-of-daily-living
#14
Philipp Gulde, Charmayne Mary Lee Hughes, Joachim Hermsdörfer
Background: Stroke frequently impairs activities of daily living (ADL) and deteriorates the function of the contra- as well as the ipsilesional limbs. In order to analyze alterations of higher motor control unaffected by paresis or sensory loss, the kinematics of ipsilesional upper limb movements in patients with stroke has previously been analyzed during prehensile movements and simple tool use actions. By contrast, motion recording of multi-step ADL is rare and patient-control comparisons for movement kinematics are largely lacking...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28223136/wnt3%C3%AE-and-transforming-growth-factor-%C3%AE-induce-myofibroblast-differentiation-from-periodontal-ligament-cells-via-different-pathways
#15
Hui Xu, Yao He, Jian Q Feng, Rui Shu, Zhe Liu, Jingyu Li, Yating Wang, Yang Xu, Huan Zeng, Xin Xu, Zichao Xiang, Chaoran Xue, Ding Bai, Xianglong Han
Myofibroblasts are specialized cells that play a key role in connective tissue remodeling and reconstruction. Alpha-smooth muscle actin (α-SMA), vimentin and tenascin-C are myofibroblast phenotype, while α-SMA is the phenotypic marker. The observation that human periodontal ligament cells (hPDLCs) differentiate into myofibroblasts under orthodontic force has provided a new perspective for understanding of the biological and biomechanical mechanisms involved in orthodontic tooth movement. However, the cell-specific molecular mechanisms leading to myofibroblast differentiation in the periodontal ligament (PDL) remain unclear...
February 18, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28223023/analysis-of-facial-expressions-in-parkinson-s-disease-through-video-based-automatic-methods
#16
Andrea Bandini, Silvia Orlandi, Hugo Jair Escalante, Fabio Giovannelli, Massimo Cincotta, Carlos A Reyes-Garcia, Paola Vanni, Gaetano Zaccara, Claudia Manfredi
BACKGROUND: The automatic analysis of facial expressions is an evolving field that finds several clinical applications. One of these applications is the study of facial bradykinesia in Parkinson's disease (PD), which is a major motor sign of this neurodegenerative illness. Facial bradykinesia consists in the reduction/loss of facial movements and emotional facial expressions called hypomimia. NEW METHOD: In this work we propose an automatic method for studying facial expressions in PD patients relying on video-based METHODS: 17 Parkinsonian patients and 17 healthy control subjects were asked to show basic facial expressions, upon request of the clinician and after the imitation of a visual cue on a screen...
February 18, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28222947/comparison-of-the-effectiveness-of-three-different-treatment-methods-for-temporomandibular-joint-disc-displacement-without-reduction
#17
U Tatli, M E Benlidayi, O Ekren, F Salimov
The aim of this study was to compare the effectiveness of three treatment methods for unilateral temporomandibular joint (TMJ) disc displacement without reduction (DDwoR). One hundred and twenty patients with unilateral TMJ DDwoR were assigned randomly to one of three treatment groups (40 patients in each): group 1 received arthrocentesis, group 2 received stabilization splint therapy following arthrocentesis, and group 3 received splint therapy only. The groups were compared in terms of pain (visual analogue scale), joint function (maximum mouth opening and laterotrusive movements), disability and psychological status (validated questionnaire), and success rates...
February 17, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28222546/recovering-functional-independence-after-a-stroke-through-modified-constraint-induced-therapy
#18
A Doussoulin, M Arancibia, J Saiz, A Silva, M Luengo
BACKGROUND: Population ageing and changes in the epidemiological profile of neurological pathologies has resulted in an increase in patients with disabilities. Rehabilitation strategies such as Modified Constraint-Induced Movement Therapy (CIMTm) play a key role in treating patients with neurologic deficiencies and motor impairments. This intervention is intended to mitigate disability, promote maximum functional independence, and optimize social and economic participation of patients with upper extremity weakness...
January 31, 2017: NeuroRehabilitation
https://www.readbyqxmd.com/read/28222539/technologies-assessing-limb-bradykinesia-in-parkinson-s-disease
#19
Hasan Hasan, Dilan S Athauda, Thomas Foltynie, Alastair J Noyce
BACKGROUND: The MDS-UPDRS (Movement Disorders Society - Unified Parkinson's Disease Rating Scale) is the most widely used scale for rating impairment in PD. Subscores measuring bradykinesia have low reliability that can be subject to rater variability. Novel technological tools can be used to overcome such issues. OBJECTIVE: To systematically explore and describe the available technologies for measuring limb bradykinesia in PD that were published between 2006 and 2016...
2017: Journal of Parkinson's Disease
https://www.readbyqxmd.com/read/28222504/bimanual-gesture-imitation-in-alzheimer-s-disease
#20
G Nter Sanin, Thomas Benke
BACKGROUND/OBJECTIVE: Unimanual gesture production or imitation has often been studied in Alzheimer's disease (AD) during apraxia testing. In the present study, it was hypothesized that bimanual motor tasks may be a sensitive method to detect impairments of motor cognition in AD due to increased demands on the cognitive system. METHODS: We investigated bimanual, meaningless gesture imitation in 45 AD outpatients, 38 subjects with mild cognitive impairment (MCI), and 50 normal controls (NC) attending a memory clinic...
February 7, 2017: Journal of Alzheimer's Disease: JAD
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