TY  - JOUR
AU  - Spasić, Slađana Z.
AU  - Nikolić, Ljiljana
AU  - Mutavdžić, Dragosav
AU  - Šaponjić, Jasna
PY  - 2011
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/1250
AB  - We applied a combination of fractal analysis and Independent Component Analysis (ICA) method to detect the sources of fractal complexity in snail Br neuron activity induced by static magnetic field of 2.7 mT. The fractal complexity of Br neuron activity was analyzed before (Control), during (MF), and after (AMF) exposure to the static magnetic field in six experimental animals. We estimated the fractal dimension (FD) of electrophysiological signals using Higuchi's algorithm, and empirical FD distributions. By using the Principal Component Analysis (PCA) and FastICA algorithm we determined the number of components, and defined the statistically independent components (ICs) in the fractal complexity of signal waveforms. We have isolated two independent components of the empirical FD distributions for each of three groups of data by using FastICA algorithm. ICs represent the sources of fractal waveforms complexity of Br neuron activity in particular experimental conditions. Our main results have shown that there could be two opposite intrinsic mechanisms in single snail Br neuron response to static magnetic field stimulation. We named identified ICs that correspond to those mechanisms - the component of plasticity and the component of elasticity. We have shown that combination of fractal analysis with ICA method could be very useful for the decomposition and identification of the sources of fractal complexity of bursting neuronal activity waveforms. (C) 2011 Elsevier Ireland Ltd. All rights reserved.
T2  - Computer Methods and Programs in Biomedicine
T1  - Independent complexity patterns in single neuron activity induced by static magnetic field
IS  - 2
VL  - 104
EP  - 218
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_1250
ER  - 

@article{
author = "Spasić, Slađana Z. and Nikolić, Ljiljana and Mutavdžić, Dragosav and Šaponjić, Jasna",
year = "2011",
abstract = "We applied a combination of fractal analysis and Independent Component Analysis (ICA) method to detect the sources of fractal complexity in snail Br neuron activity induced by static magnetic field of 2.7 mT. The fractal complexity of Br neuron activity was analyzed before (Control), during (MF), and after (AMF) exposure to the static magnetic field in six experimental animals. We estimated the fractal dimension (FD) of electrophysiological signals using Higuchi's algorithm, and empirical FD distributions. By using the Principal Component Analysis (PCA) and FastICA algorithm we determined the number of components, and defined the statistically independent components (ICs) in the fractal complexity of signal waveforms. We have isolated two independent components of the empirical FD distributions for each of three groups of data by using FastICA algorithm. ICs represent the sources of fractal waveforms complexity of Br neuron activity in particular experimental conditions. Our main results have shown that there could be two opposite intrinsic mechanisms in single snail Br neuron response to static magnetic field stimulation. We named identified ICs that correspond to those mechanisms - the component of plasticity and the component of elasticity. We have shown that combination of fractal analysis with ICA method could be very useful for the decomposition and identification of the sources of fractal complexity of bursting neuronal activity waveforms. (C) 2011 Elsevier Ireland Ltd. All rights reserved.",
journal = "Computer Methods and Programs in Biomedicine",
title = "Independent complexity patterns in single neuron activity induced by static magnetic field",
number = "2",
volume = "104",
pages = "218",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_1250"
}

Spasić, S. Z., Nikolić, L., Mutavdžić, D.,& Šaponjić, J.. (2011). Independent complexity patterns in single neuron activity induced by static magnetic field. in Computer Methods and Programs in Biomedicine, 104(2).
https://hdl.handle.net/21.15107/rcub_ibiss_1250

Spasić SZ, Nikolić L, Mutavdžić D, Šaponjić J. Independent complexity patterns in single neuron activity induced by static magnetic field. in Computer Methods and Programs in Biomedicine. 2011;104(2):null-218.
https://hdl.handle.net/21.15107/rcub_ibiss_1250 .

Spasić, Slađana Z., Nikolić, Ljiljana, Mutavdžić, Dragosav, Šaponjić, Jasna, "Independent complexity patterns in single neuron activity induced by static magnetic field" in Computer Methods and Programs in Biomedicine, 104, no. 2 (2011),
https://hdl.handle.net/21.15107/rcub_ibiss_1250 .

TY  - CONF
AU  - Spasić, Slađana
AU  - Nikolić, Ljiljana
AU  - Mutavdžić, Dragosav
AU  - Kartelija, Gordana
AU  - Todorović, Dajana
PY  - 2009
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/4031
AB  - Numerous studies have dealt with the effects of magnetic fields on the nervous system. In the present work we tested effect of 2.7 mT magnetic field on spontaneous Br neuron activity in subesophageal ganglia of garden snail Helix pomatia by Higuchi fractal dimension as a nonlinear measure of signal complexity in time domain. Fractal analysis was performed by estimating fractal dimension (FD) of bioelectric signals from Br neurons using Higuchi's algorithm. We used principal components analysis as a method of factor extraction in factor analysis of empirical distribution of FD. Shape of the empirical distribution of FD pointed out on bimodal pattern in complexity of spontaneous Br neuron activity. The factor analysis showed that there are two principal factors in empirical distribution of fractal dimension: F 1 and F2. The differences between factors F 1 and F2 in different experimental conditions ( control, under magnetic field (MF) and after exposure to the magnetic field (AMF)) were tested by Kolmogorov-Smimov Test. The analysis showed that there is no difference between F1 factors in control vs. MF condition, and in control vs. AMF condition. However, significant difference was found between f 2 factors in control vs. MF condition, and in control vs. AMF condition. Factor analysis also showed there is no difference between F2 factors in MF vs. AMF condition. Generally, results indicated that irreversible changes in complexity of Br neuron activity occurred after exposure to magnetic field compared to the control conditions.
PB  - Belgrade: Serbian Physiological Society
C3  - Second Congress of Physiological Sciences of Serbia with International Participation “Current Trends in Physiological Sciences”
T1  - Effect of static magnetic field on fractal complexity on spontaneous neuronal activity in snail
SP  - 180
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_4031
ER  - 

@conference{
author = "Spasić, Slađana and Nikolić, Ljiljana and Mutavdžić, Dragosav and Kartelija, Gordana and Todorović, Dajana",
year = "2009",
abstract = "Numerous studies have dealt with the effects of magnetic fields on the nervous system. In the present work we tested effect of 2.7 mT magnetic field on spontaneous Br neuron activity in subesophageal ganglia of garden snail Helix pomatia by Higuchi fractal dimension as a nonlinear measure of signal complexity in time domain. Fractal analysis was performed by estimating fractal dimension (FD) of bioelectric signals from Br neurons using Higuchi's algorithm. We used principal components analysis as a method of factor extraction in factor analysis of empirical distribution of FD. Shape of the empirical distribution of FD pointed out on bimodal pattern in complexity of spontaneous Br neuron activity. The factor analysis showed that there are two principal factors in empirical distribution of fractal dimension: F 1 and F2. The differences between factors F 1 and F2 in different experimental conditions ( control, under magnetic field (MF) and after exposure to the magnetic field (AMF)) were tested by Kolmogorov-Smimov Test. The analysis showed that there is no difference between F1 factors in control vs. MF condition, and in control vs. AMF condition. However, significant difference was found between f 2 factors in control vs. MF condition, and in control vs. AMF condition. Factor analysis also showed there is no difference between F2 factors in MF vs. AMF condition. Generally, results indicated that irreversible changes in complexity of Br neuron activity occurred after exposure to magnetic field compared to the control conditions.",
publisher = "Belgrade: Serbian Physiological Society",
journal = "Second Congress of Physiological Sciences of Serbia with International Participation “Current Trends in Physiological Sciences”",
title = "Effect of static magnetic field on fractal complexity on spontaneous neuronal activity in snail",
pages = "180",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_4031"
}

Spasić, S., Nikolić, L., Mutavdžić, D., Kartelija, G.,& Todorović, D.. (2009). Effect of static magnetic field on fractal complexity on spontaneous neuronal activity in snail. in Second Congress of Physiological Sciences of Serbia with International Participation “Current Trends in Physiological Sciences”
Belgrade: Serbian Physiological Society., 180.
https://hdl.handle.net/21.15107/rcub_ibiss_4031

Spasić S, Nikolić L, Mutavdžić D, Kartelija G, Todorović D. Effect of static magnetic field on fractal complexity on spontaneous neuronal activity in snail. in Second Congress of Physiological Sciences of Serbia with International Participation “Current Trends in Physiological Sciences”. 2009;:180.
https://hdl.handle.net/21.15107/rcub_ibiss_4031 .

Spasić, Slađana, Nikolić, Ljiljana, Mutavdžić, Dragosav, Kartelija, Gordana, Todorović, Dajana, "Effect of static magnetic field on fractal complexity on spontaneous neuronal activity in snail" in Second Congress of Physiological Sciences of Serbia with International Participation “Current Trends in Physiological Sciences” (2009):180,
https://hdl.handle.net/21.15107/rcub_ibiss_4031 .

TY  - JOUR
AU  - Todorović, Dajana
AU  - Kalauzi, Aleksandar
AU  - Prolić, Zlatko
AU  - Jović, Miloš
AU  - Mutavdžić, Dragosav
PY  - 2007
UR  - https://onlinelibrary.wiley.com/doi/abs/10.1002/bem.20288
UR  - https://pubmed.ncbi.nlm.nih.gov/17203477/
UR  - https://radar.ibiss.bg.ac.rs/123456789/3921
AB  - Modification of a new method for detecting changes in the activities of neuronal population and the
nearest neuron is described. Preliminary measurements of the influence of a static magnetic field (2
mT) on neuronal population activity on eight individuals of an endangered insect species Morimus
funereus are included. Five minutes exposure produced both excitatory (5/8) and inhibitory (3/8) effect
on the activity of neuronal population of M. funereus antennal lobe. However, when the reversibility of
induced effects was quantitatively analyzed, our results showed that they were prevailingly
irreversible: (7/8) for the population, (6/8) for the nearest neuron.
PB  - Wiley‐Liss, Inc.
T2  - Bioelectromagnetics
T1  - A Method for Detecting the Effect of Magnetic Field on Activity Changes of Neuronal Populations of Morimus funereus (Coleoptera,Cerambycidae)
IS  - 3
VL  - 28
DO  - 10.1002/bem.20288
SP  - 238
EP  - 241
ER  - 

@article{
author = "Todorović, Dajana and Kalauzi, Aleksandar and Prolić, Zlatko and Jović, Miloš and Mutavdžić, Dragosav",
year = "2007",
abstract = "Modification of a new method for detecting changes in the activities of neuronal population and the
nearest neuron is described. Preliminary measurements of the influence of a static magnetic field (2
mT) on neuronal population activity on eight individuals of an endangered insect species Morimus
funereus are included. Five minutes exposure produced both excitatory (5/8) and inhibitory (3/8) effect
on the activity of neuronal population of M. funereus antennal lobe. However, when the reversibility of
induced effects was quantitatively analyzed, our results showed that they were prevailingly
irreversible: (7/8) for the population, (6/8) for the nearest neuron.",
publisher = "Wiley‐Liss, Inc.",
journal = "Bioelectromagnetics",
title = "A Method for Detecting the Effect of Magnetic Field on Activity Changes of Neuronal Populations of Morimus funereus (Coleoptera,Cerambycidae)",
number = "3",
volume = "28",
doi = "10.1002/bem.20288",
pages = "238-241"
}

Todorović, D., Kalauzi, A., Prolić, Z., Jović, M.,& Mutavdžić, D.. (2007). A Method for Detecting the Effect of Magnetic Field on Activity Changes of Neuronal Populations of Morimus funereus (Coleoptera,Cerambycidae). in Bioelectromagnetics
Wiley‐Liss, Inc.., 28(3), 238-241.
https://doi.org/10.1002/bem.20288

Todorović D, Kalauzi A, Prolić Z, Jović M, Mutavdžić D. A Method for Detecting the Effect of Magnetic Field on Activity Changes of Neuronal Populations of Morimus funereus (Coleoptera,Cerambycidae). in Bioelectromagnetics. 2007;28(3):238-241.
doi:10.1002/bem.20288 .

Todorović, Dajana, Kalauzi, Aleksandar, Prolić, Zlatko, Jović, Miloš, Mutavdžić, Dragosav, "A Method for Detecting the Effect of Magnetic Field on Activity Changes of Neuronal Populations of Morimus funereus (Coleoptera,Cerambycidae)" in Bioelectromagnetics, 28, no. 3 (2007):238-241,
https://doi.org/10.1002/bem.20288 . .