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This paper aims in interpreting the leg muscles responses recorded by electromyography during magnetic stimulation of the spinal cord by computing the electric field induced in the spinal cord and the nearby areas during this procedure. A simplified model of the spine was created and a Finite Difference Method algorithm was implemented in Matlab.
The purpose of this paper is to evaluate the response of the spinal cord and nearby area during lumbar magnetic stimulation. One of the most important issues about magnetic stimulation of nervous tissue is the lack of precision in the stimulated region. Based on the experimental measurements performed in cooperation with the Medical University of Vienna,(More)
This article aims to determine the necessary characteristics of a magnetic stimulator, capable of stimulating neural tracts of the spinal cord in a healthy subject. Our previous preliminary tests had shown that the commercial clinical magnetic stimulator Magstim Rapid(2) was unable to reach excitable structures within the spinal cord, and only adjacent(More)
The technique of magnetic stimulation (MS) of nerve fibers represents a common technique in modern medicine. One of the most important issues regarding the MS of the nervous tissue is represented by the lack of precision concerning the stimulated region. In order to obtain stimulation results as good as possible, the optimization necessity for both the(More)
This paper aims in evaluating the efficiency of magnetic stimulators capable of stimulating neural tracts of the spinal cord in healthy subjects. Our previous preliminary tests had shown that the commercial clinical magnetic stimulator Magstim Rapid2 was unable to activate nerve structures located in the spinal cord, with its maximum deliverable energy. In(More)
In this paper we present a model that combines circuit analysis with Maxwell's equations of electromagnetic theory and non-linear cable theory, to explain the action of the induced electric field upon a nerve fiber. The current source and stimulating coil are modeled as a series RLC circuit. The induced electric field distribution within a homogeneous(More)
The paper describes the implementation in ORCAD of equivalent circuits, used to model an artificially created frequency response function. The function is implemented and graphically represented in Matlab. Next, we compute the input admittance/impedance of the two proposed equivalent circuits (that include controlled sources), and compare it to the initial(More)
Teaching electrical engineering with the help of simulation packages is very essential nowadays to explain/examine the circuit topologies and operation. The paper focuses on the power factor compensation in the three-phase electric circuits. The three-phase electric network, working on a known nominal power, will be simulated using OrCAD, a programme for(More)
This paper presents the results of measurements of the magnetic fields generated by video display terminals (VDT). For a complete field characterization the time and frequency domain measurements of the field are made at some distances from the screen. There were performed comparative measurements by using a few sensors