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Experimental data processing in real time
Veselý, Petr ; Harabiš, Vratislav (referee) ; Kolářová, Jana (advisor)
The thesis completes the current programming equipment for experimental measurement of isolated animal heart signals. It adds a block providing the pre-processing of the signals. The signals measured are the elektrogram (EG) and the action potential (AP). The origin of individual signals, the measuring method and the possibilities of noise elimination are dealt with in the theoretical part of the thesis. The practical part describes the pre-processing block securing the noise elimination during the AP. It uses accumulative methods of averaging the corresponding time periods of the AP. Based on the results of measuring the signal to noise ratio, the thesis suggests the most appropriate accumulative methods and their variables. In order for the chosen accumulative methods to work well, it is important to divide the AP process into sectors of corresponding shape (repeats). The connection between the EG and AP processes is used to determine the beginning and end of the sectors. These points are identified by the detection of R and T wave peaks in the EG. To detect the R and T waves, the thesis uses methods based on wavelet transform. The efficiency and accuracy of detection methods is verified by test EG signals with hand-marked R and T wave peaks.
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Electromyography
Svobodová, Eva ; Bubník, Karel (referee) ; Chmelař, Milan (advisor)
The first part of this bachelor´s thesis is focused to elements of the muscle and nerve structures and spreading of excitation (signal) through them. Second part is concerned to electromyography as an investigative method that is used in medical diagnostics and basic requirements for the electromyography and its components. In this thesis is described examinational techniques motoric and sensitive nerve conduction. There are described requirements of recording, stimulation and also evaluation of constituent elements of signal. The final part is focused on specific laboratory exercises with specific instructions.
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Modeling of calcium dynamics in excitable and non-excitable cells
Tkáč, Jan ; Čmiel, Vratislav (referee) ; Rychtárik, Milan (advisor)
This bachelor thesis deals with electrophysiologic phenomenons on molecular and cellular level. The aim is to provide basic information for better understanding of simple cellular models. This work also discusses principles of calcium dynamic modelling in cells. In Matlab environment the Lou-Rudy model from 1991, Lou-Rudy model from 1994 and the phantom burster model for pancreatic ß-cells are implemented. Using the GUI interface a clear program for simulation electrophysiologic phenomenons is created.
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Modelling the Spread of Action Potentials in Myocardium
Běleja, Marek ; Čmiel, Vratislav (referee) ; Provazník, Ivo (advisor)
The work deals with the foundations of bioelectric phenomena cardiomyocyte, then it is also part of this description of the heart conduction system and method of distribution in this system The next section is a description of the spread in the system, the very essence of the spread. In the last chapter analyzes the theory for the creation of computational models, which extend in one dimension or two dimensions
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Modeling of action potential of heart cells
Zemánek, Ladislav ; Čmiel, Vratislav (referee) ; Rychtárik, Milan (advisor)
This bachelor’s thesis deals with studies and researches models of action potentials of cardiac cells. It offers a description of the various models including description of their current components. The own solution of this project includes reconstruction of models of cardiac cell in numerical computing environment Matlab and compared with literature.
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Acceleration and motion of upper limbs
Novotný, Adam ; Kolář, Radim (referee) ; Kolářová, Jana (advisor)
Purpose of this work is mainly the description of electrical plots in skeletal muscles and secondarily experimental verification and description of methods connected with measuring and evaulating biosignals. The theoretical presentation of muscle physiology facts is supplemented with an experiment using pair t-test, which describes procedures leading to evaluating particular hypotheses (the measured muscle is biceps brachii). In this work, the biosignal is an EMG signal, thus the electrical activity of muscle. Therefore, the main objective of this work is not only about using EMG as an examination method, but also about showing a complex view at the recording, processing and evaluating of EMG signal. These facts are supplemented with programm application which is showing the way working with EMG signals and also the possibilities of algorithm development in such signals.
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Fuzzy Neural Networks for Pattern Classification
Ollé, Tamás ; Raida, Zbyněk (referee) ; Vágnerová, Jitka (advisor)
Práce popisuje základy principu funkčnosti neuronů a vytvoření umělých neuronových sítí. Je zde důkladně popsána struktura a funkce neuronů a ukázán nejpoužívanější algoritmus pro učení neuronů. Základy fuzzy logiky, včetně jejich výhod a nevýhod, jsou rovněž prezentovány. Detailněji je popsán algoritmus zpětného šíření chyb a adaptivní neuro-fuzzy inferenční systém. Tyto techniky poskytují efektivní způsoby učení neuronových sítí.
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Biosignal processing - clusetr analysis
Příhodová, Petra ; Maděránková, Denisa (referee) ; Kolářová, Jana (advisor)
This thesis deals with the problem with cluster analysis and biosignal classification options. The principle of cluster analysis, methods for calculating distances between objects and the standard process in the implementation of clustering are described in the first part. For biosignals processing,it is necessary to get familiar with the primary parameters of these signals in the following sections of thesis, process biosignals and methods for recording of action potentials described. Based on studying different clustering methods is presented a program with the applied method kmedoid in the next section of this thesis. The steps of this program are described in detail and in the end of thesis functionality is tested on a database of signals ÚBMI.
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Effect of surface electrode type on quality of decopmposition of surface EMG signal
Strusková, Edita ; Otáhal, Jakub (advisor) ; Michalec, Radim (referee)
Title: Effect of surface electrode type on quality of decomposition of surface EMG signal Objectives: The aim of this thesis is to evaluate the effect of surface electrode type, which was used for EMG record, on the quality of decomposition of surface EMG signal using decomposition software EMGlab. Methods: The form of the thesis is an experimental essay. It was detected an EMG signal from one healthy volunteer during mild cyclic contraction. It was used three different types of electrodes (standard surface electrode, tetrode, tetrode with saw-off spikes) for EMG signal detection. These signals were decomposed in program EMGlab. The results were processed in program MS Excel, compared with each other and graphically displayed. Results: The measurement verified a hypothesis which claimed that the used type of electrode affects the quality of automatic decomposition. The best results of automatic decomposition provide the signal gained from the standard surface electrode. Key words: action potential, decomposition, surface electrodes, EMG signal, tetrode, electromyography
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EMG biofeedback
Sekera, Lukáš ; Kolářová, Jana (referee) ; Janoušek, Oto (advisor)
First part of bachelor’s thesis is describing composition and function of muscles. Afterwards is described EMG signal, its measurement and evaluation. In the second part of bachelor’s thesis ale programed 3 games for myofeedback, which are using the evaluation of EMG signal. First parameter used is the duration of action potencial, second is strenghth of the muscle and last is measuring the time of response to stimulus.
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