Wiktoria Wojnicz - Publications - MOST Wiedzy

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dr hab. inż. Wiktoria Wojnicz

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Catalog Publications

2020
  • Perceptual and Motor Effects of Muscle Co-activation in a Force Production Tas
    Publication

    - NEUROSCIENCE - 2020

    We tested several predictions of the theory of motor control with spatial referent coordinates related to effects of muscle coactivation on force production and perception. In particular, we predicted that subjects would produce unintentional force increase by finger flexors and be unaware of this force increase. Healthy subjects performed steady force production task in isometric conditions with visual feedback on the force level....

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2019
  • Applicable Solutions in Non-Linear Dynamical Systems
    Publication

    - 2019

    .

  • Influence of the shoe type on the ground reaction force
    Publication
    • M. Klepczyńska
    • B. Zagrodny
    • W. Wojnicz
    • M. Ludwicki
    • J. Awrejcewicz

    - 2019

    The aim of this work was to estimate a relationship between the type of the footwear and ground reactions. Differences in medio-lateral, anteriorposterior and vertical reactions are compared for different shoe-types for male and female volunteers. Each of the participants gait was recorded in case of different shoes and without them, also stabilograms were analyzed. Results revealed differences in ground reaction forces for different...

  • Influence of the shoe type on the ground reaction forces
    Publication
    • M. Klepczyńska
    • B. Zagrodny
    • W. Wojnicz
    • M. Ludwicki
    • J. Awrejcewicz

    - 2019

    The aim of this work was to estimate a relationship between the type of the footwear and ground reactions. Differences in medio-lateral, anterior-posterior and vertical reactions are compared for different shoe-types for male and female volunteers. Each of the participants gait was recorded in case of different shoes and without them, also stabilograms were analyzed. Results revealed differences in ground reaction forces for different...

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  • Jaw biomechanics: Estimation of activity of muscles acting at the temporomandibular joint

    The aim of this study was to elaborate a method of estimation of activity of surface muscles acting at the temporomandibular joint of the healthy subjects by using a surface electromyography (EMG). The scope of this study involved testing chosen jaw motions (open, close, lateral deviation) and process of mastication occurring during eating food with different toughness (chewing gum, cereal and carrot) by using mixed sides, right...

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  • Multibody models for gait analysis
    Publication

    - 2019

    The aim of this study was to create multibody biomechanical models to analyze a normal gait of the human. Proposed models can be used to identify joint moments of the lower limbs during normal gait in the single and double support phases. Applying Newton-Euler formulation, following planar models were developed: 1) a mathematical 6DOF model describing a gait in the sagittal plane of the body for single support phase and double...

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  • Theoretical Approaches in Non-Linear Dynamical Systems
    Publication
    • J. Awrejcewicz
    • M. Kaźmierczak
    • J. Mrozowski
    • M. Klepczyńska
    • B. Zagrodny
    • W. Wojnicz
    • M. Ludwicki

    - 2019

    .

2018
  • Approach for Determination of Functioning of Lower Limb Muscles
    Publication
    • W. Wojnicz
    • B. Zagrodny
    • M. Ludwicki
    • M. Syczewska
    • J. Mrozowski
    • J. Awrejcewicz

    - 2018

    The purpose of the study is elaboration of approach for determination of functioning of chosen muscles that are essential for gait performance (Tibialis Anterior, Rectus Femoris, Gastrocnemius Medialis, Biceps Femoris). The scope of the study involves the analysis of the symmetric planar motion performing in the sagittal plane of the body by applying planar multibody model and electromyography signals (EMG) registered over normal...

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  • Biomechaniczne modele układu mięśniowo-szkieletowego człowieka
    Publication

    - 2018

    Niniejsza monografia jest poświęcona problemom modelowania zachowania układu mięśniowo-szkieletowego człowieka. Publikacja zawiera opis badań rozwijanych w zakresie: biomechaniki mięśni, biomechaniki zespołów mięśniowych, biomechaniki układu szkieletowego, biomechaniki narządu ruchu, a także zastosowania sygnałów fizjologicznych (elektromiograficznych) oraz projektowania urządzeń do rehabilitacji na podstawie zasad sterowania...

  • Cooperation of mono- and bi-articular muscles: human lower limb
    Publication
    • B. Zagrodny
    • M. Ludwicki
    • W. Wojnicz
    • J. Mrozowski
    • J. Awrejcewicz

    - JOURNAL OF MUSCULOSKELETAL & NEURONAL INTERACTIONS - 2018

    Objectives: The aim of this study was to create and analyze a Pareto-optimal problem that would describe cooperation between mono- and bi-articulate lower limb muscles in sagittal plane. Methods: Equations describing the problem were derived and analyzed, additional constrains were introduced and experimental verification based on gait video analysis was performed. Results: Uncertainty of Pareto-optimal solution is shown for the...

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  • Dynamical Systems in Applications
    Publication
    • J. Awrejcewicz
    • W. Wojnicz
    • B. Zagrodny
    • M. Ludwicki
    • M. Syczewska
    • J. Mrozowski

    - 2018

    This book collects only a small, carefully selected part of the topics covered by the participants of the latest edition of DSTA Conference.This volume covers a very wide spectrum of topics, varying from purely mathematical to purely engineering approaches that were presented by both experienced and ambitious young researchers. All of the chapters ranging from purely theoretical to application-oriented studies are connected by...

  • FEM approach to modeling of an irregular trabecular structure
    Publication

    The aim of the study is elaboration of a method for creating irregular scaffolds that can be used to model the behaviour of trabecular bone placed in the proximal epiphysis of the femur. The scope of the study encompasses creating six numerical models of irregular scaffolds (two solid irregular scaffolds, two shell irregular scaffolds and two shell irregular scaffolds with fortification) and performing numerical analysis of the...

  • Numerical analysis of mechanical properties of an infill structure used in 3D printings

    The paper presents results of a numerical analysis focused on an identification of mechanical properties of an element created by using Fused Deposition Modelling additive manufacturing technique (FDM). There is presented a description of technology of the 3D printing, numerical model created by using the finite element method (FEM), as well as some problems referred to estimation of the mechanical properties of the printout. The...

  • Shell Structures: Theory and Applications, vol.4
    Publication

    - 2018

    .

2017
2016
  • Influence of Additional Loads on Chosen Gait Parameters and Muscles Activity
    Publication
    • M. Ludwicki
    • B. Zagrodny
    • W. Wojnicz
    • J. Mrozowski
    • J. Awrejcewicz

    - Vibrations in Physical Systems - 2016

    This paper is devoted to human motion analysis and comparison of chosen kinematics parameters during normal gait with and without additional load in a form of backpack. A stability in both cases were compared in both frontal and sagittal planes, by applying a video tracking system. Experimental tests performed on treadmill, passive markers, placed on volunteers bare skin were used. Additionally, an infra-red camera was employed...

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  • Numerical Model of Femur Part

    The aim of the study is to create a new more accurate method of femur part modelling by using the finite element method. According to this new method, a femur part is treated as a complex structure composed of trabecular bone (internal part) and cortical bone (external part). The internal part is modelled as a scaffold, thus the external part is modelled as a coat (i.e. covering). Applying the programme ABAQUS, there were created...

  • Zastosowanie EMG do analizy wybranych ruchów kończyny górnej

    Celem badań było przeprowadzenie pomiarów sygnału mioelektrycznego czterech mięśni powierzchniowych lewej kończyny górnej, biorących udział w ruchach zginania-prostowania w stawie łokciowym w płaszczyźnie strzałkowej. Rejestrację elektromiogramów (EMG) odprowadzono z: głowy długiej oraz bocznej mięśnia trójgłowego ramienia, głowy długiej mięśnia dwugłowego ramienia i mięśnia ramienno-promieniowego. Wykazano, iż metoda może zostać...

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2015
  • Mathematical model of pennate muscle
    Publication

    - 2015

    The purpose of this study is to create a new mathematical model of pennate striated skeletal muscle. This new model describes behaviour of isolated flat pennate muscle in two dimensions (2D) by taking into account that rheological properties of muscle fibres depend on their planar arrangement. A new mathematical model is implemented in two types: 1) numerical model of unipennate muscle (unipennate model); 2) numerical model of...

  • Modelowanie zachowania układu mięśni
    Publication

    W rozdziale są opisane podejścia do zamodelowania zachowania zespołu mięśni, które są oparte o zasady mechaniki. Zgodnie z tymi zasadami problem zamodelowania zachowania zespołu mięśni należy rozwiązać jako odwrotne lub proste zadanie dynamiki. Odwrotne zadanie dynamiki pozwala na wyznaczenie sił/momentów generowanych przez poszczególne mięśnie na podstawie danych kinematycznych, tzn. trajektorii ruchu oraz jej pochodnych (prędkości...

2014
2013
  • Method of Skeletal System Modelling

    An original method of skeletal system modelling is presented in detail. Using DICOM images obtained from CT and PET tests, shell models of nine bones were created (humerus, radius, ulna, scapula, clavicle, femur, tibia, fibula, pelvis). Two methods of bone behaviour are also proposed, the first method treating the bone as a solid structure and the second method treating the bone as a complex porous structure. The behaviour of model...

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  • Modelling of planar movement dynamics of upper limb
    Publication

    The original model describing planar movement dynamics of upper limb is presented. The upper limb is modelled as two-joints system loaded by external forces and internal forces of striated skeletal muscles. A behaviour of each muscle is modelled as a system composed of serially linked rheologic fragments that have different mechanical properties. These muscle models allow us to simulate a behaviour of short fusiform muscle (3DOF...

2012
  • Application of muscle model to the musculoskeletal modeling

    The purpose of this paper is to investigate new fusiform muscle models. Each of these models treats a muscle as a system composedof parts characterized by different mechanical properties. These models explain the influence of differences in the stiffness of lateral parts and the degree of muscle model discretization. Each muscle model is described by a system of differential equations and a single integro-differential equation....

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  • Modele dyskretne w analizie dynamiki mięśni szkieletowych układu ramię-przedramię
    Publication

    Monografia przeznaczona jest dla studentów i pracowników naukowych zajmujących się biomechaniką. Jest poświęcona modelowaniu zachowania zespołu mięśni szkieletowych poprzecznie prążkowanych, które należą do aparatu ruchowego człowieka i pozwalają na wykonywanie ruchów określanych przez świadomość, ruchów wyuczonych oraz odruchów nieświadomych. Zaproponowano dwa nowe modele obliczeniowe: zachowania mięśnia oraz zachowania mięśnia...

2011
  • Chosen aspects of muscle biomechanics
    Publication

    Considering a striated skeletal muscle as a different properties mechanical system, one can understand series of important phenomena happening in a real muscle phenomenon of muscle: 1) force delivery to skeletal apparatus through tendons; 2) changing of exerted muscle belly mass distribution with regards to skeletal apparatus; 3) beginning drop of muscle force. A disregard of first phenomenon causes an impossibility to explain...

2010
2009
  • Analysis of muscles behaviour : The computational model of muscle. -Part I

    W artykule zaproponowano model obliczeniowy mięśnia szkieletowego, który potraktowano jako strukturę o złożonych i zróżnicowanych właściwościach mechanicznych. Szczegółowo opisano metodę identyfikacji tych właściwości. Ponadto określono sposób przeprowadzenia weryfikacji ilościowej i jakościowej zaproponowanego modelu. Za pomocą takiego obliczeniowego modelu mięśnia można łatwo określać siły w mięśniach, które należą do zespołu...

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  • Modelowanie i symulacja zachowania zespołu mięśni szkieletowych układu ramię-przedramię
    Publication

    - 2009

    Praca jest poświęcona modelowaniu zachowania zespołu mięśni szkieletowych poprzecznie prążkowanych, które działają w układzie ramię-przedramię. W pracy zaproponowano dwa nowe modele obliczeniowe: model zachowania mięśnia (model mięśnia) oraz model zachowania zespołu mięśni układu ramię-przedramię (model zespołu mięśni). Wykonano badania numeryczne modelu mięśnia i modelu zespołu mięśni oraz uzyskano zadowalające wyniki weryfikacji...

2008
2006
2005
2004
2003

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