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The Scan 4.2 program from the Neuroscan package is designed for the analysis of EEG signals and cortical evoked potentials. The signals are recorded on-line during the subject stimulation. This enables us to examine the dependency of the evoked potentials on changes in the spontaneous activity. Such an analysis requires selection of events, according to the given criteria, and then extraction of the...
Static posturography is a method of analysis of the human postural control system, in which the center of pressure (COP) sway at quiet standing is investigated. In this study, the Langevin equation is used as a model of the COP sway. The solution of this equation is the probability density function P(r,t/r(t0),t0). For experimental data, it is possible to represent this function in the form of a histogram...
The parametric approach to the identification of the SISO state space compartmental models of pharmacokinetic systems is presented. The model structure is formulated basing on the a priori knowledge. The initial parameter estimates are calculated on the base of the output measurements collected during the intuitive experiment. They are used for designing the optimal input, which ensures the best accuracy...
The fetal electrocardiogram (FECG) recorded from the maternaI abdominal wall, due to its low amplitude, is very sensitive to various interferences. Some of them, like the muscular interferences, are characterized by a wide range of shared frequencies and comparable amplitudes. The most dominant interference - maternaI electrocardiogram - many times exceeds the level of the useful signaI. Contrary...
The paper describes principles of the two-dimensional computer model of the heart's electrical potential activity based on formalism, created for the cell membrane by Hodgkin and Huxley. The main equations have been shown, and all kinds of heart cells involved in simulation have been considered. The method of obtaining ECG from the model was discussed together with ECG examples obtained from the computer...
Pulsatile perfusion flow resembling the natural heart beat during cardiopulmonary bypass (CPB) for open-heart surgery is more physiological than the non-pulsatile flow. However, the conventional idea of generating the pulsatile flow is far from satisfactory because of the resistance of the oxygenator and aortic cannula that counteract the force of the pulsatile pumps. The pulsatile organ perfusion...
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