TY  - CONF
AU  - Stokić, Miodrag
AU  - Milosavljević, Zorana
AU  - Subotić, Miško
PY  - 2011
UR  - https://www.casopis.fasper.bg.ac.rs/
UR  - http://rfasper.fasper.bg.ac.rs/handle/123456789/3439
AB  - Numerous studies have used electrophysiological methods in
attempts to discriminate dyslexic from non-dyslexic readers and to
identify brain mechanisms underlying specific reading disability.
The aim of the present study is to apply an analysis of largescale
neuronal networks to study brain connectivity in children with
developmental dyslexia during silent reading and to compare results
with their peers.
EEG signal was recorded from five dyslexic and five normal
readers (three female and two male) using 10-20 International system
for electrode placement and mono-polar montage. Additional EOG
electrodes were used in order to register horizontal and vertical eye
movements. Subjects had a task to read a simple story silently. The
text was presented on a computer screen with 40 cm distance from
the subject’s eyes. Five-second artefact free periods were analysed
offline using spectral analysis (FFT algorithm). Amplitude correlations
in Theta rhythm (4-7 Hz) between all 19 electrodes were calculated.
Statistically significant correlations (p=0.01) were further used for
neural network modelling.We found that dyslexic children had one closed neural network
that consisted of four elements (centro-parietal cortex: C3-C4-
Cz-P4 electrodes) and three interhemispheric connections between
homologous electrodes without complex intra- and interhemispheric
connections. Non-dyslexic readers had far more, both quantitatively
and qualitatively, complex large-scale neuronal networks in frontotemporal
and centro-parietal cortex.
Complex cognitive functions, such as reading, require dynamic
collaboration between close and distant cortical regions in order to
achieve adequate connections for parallel information processing.
AB  - Brojne studije koristile su elektrofiziološke metode u pokušaju da
diferenciraju decu sa razvojnom disleksijom od tipičnih čitača kao i da
identifikuju mehanizme koji su u osnovi razvojne disleksije.
Cilj ove studije bio je da se ispitaju karakteristike povezivanja
moždanih regija u lokalne i široko-distribuirane neuralne mreže kod
dece sa razvojnom disleksijom tokom čitanja u sebi i da se rezultati
uporede sa rezultatima dece urednih čitača.
EEG signal je snimljen kod petoro dece sa razvojnom disleksijom
(2 dečaka i 3 devojčice) i pet urednih čitača iste polne i uzrasne strukture,
koristeći 10-20 Internacionalni sistem za pozicioniranje elektroda
uz monopolarnu montažu. Dodatne elektrode su korišćene kako
bi se registrovali pokreti očiju. Ispitanici su imali zadatak da u sebi
čitaju jednostavan tekst. Tekst je prezentovan na monitoru računara
na udaljenosti od 40cm od očiju ispitanika. Periodi od 5 sekundi bez
artefakata analizirani su spektralnom analizom (FFT-Fast Fourier
Transform algoritam). Statistički značajne (p<0.01) korelacije u amplitudi
teta ritma (4-7 Hz) između svih 19 elektroda korišćene su za dalje
modeliranje neuralnih mreža.
Ustanovljeno je da su deca sa razvojnom disleksijom formirala
jednu četvoročlanu neuralnu mrežu (centro-parijetalni korteks: C3-
C4-Cz-P4) kao i tri interhemisferne konekcije između homolognih
elektroda leve i desne hemisfere bez kompleksnih intra ili interhemisfernih
konekcija. Deca sa tipičnom funkcijom čitanja su ostvarila daleko
veći broj tročlanih, četvoročlanih i petočlanih zatvorenih mreža u
odnosu na decu sa razvojnom disleksijom. Kognitivna funkcija kao što je čitanje zahteva dinamičku saradnju bliskih i udaljenih kortikalnih
regiona u cilju postizanja paralelnog procesiranja informacije.
PB  - Univerzitet u Beogradu - Fakultet za specijalnu edukaciju i rehabilitaciju
C3  - Specijalna edukacija i rehabilitacija
T1  - Specific features of brain connectivity during silent reading in children with developmental dyslexia
T1  - Specifičnosti povezivanja moždanih regija tokom čitanja u sebi kod dece sa razvojnom disleksijom
IS  - 3
SP  - 479
VL  - 10
VL  - 492
UR  - https://hdl.handle.net/21.15107/rcub_rfasper_3439
ER  - 

@conference{
author = "Stokić, Miodrag and Milosavljević, Zorana and Subotić, Miško",
year = "2011",
abstract = "Numerous studies have used electrophysiological methods in
attempts to discriminate dyslexic from non-dyslexic readers and to
identify brain mechanisms underlying specific reading disability.
The aim of the present study is to apply an analysis of largescale
neuronal networks to study brain connectivity in children with
developmental dyslexia during silent reading and to compare results
with their peers.
EEG signal was recorded from five dyslexic and five normal
readers (three female and two male) using 10-20 International system
for electrode placement and mono-polar montage. Additional EOG
electrodes were used in order to register horizontal and vertical eye
movements. Subjects had a task to read a simple story silently. The
text was presented on a computer screen with 40 cm distance from
the subject’s eyes. Five-second artefact free periods were analysed
offline using spectral analysis (FFT algorithm). Amplitude correlations
in Theta rhythm (4-7 Hz) between all 19 electrodes were calculated.
Statistically significant correlations (p=0.01) were further used for
neural network modelling.We found that dyslexic children had one closed neural network
that consisted of four elements (centro-parietal cortex: C3-C4-
Cz-P4 electrodes) and three interhemispheric connections between
homologous electrodes without complex intra- and interhemispheric
connections. Non-dyslexic readers had far more, both quantitatively
and qualitatively, complex large-scale neuronal networks in frontotemporal
and centro-parietal cortex.
Complex cognitive functions, such as reading, require dynamic
collaboration between close and distant cortical regions in order to
achieve adequate connections for parallel information processing., Brojne studije koristile su elektrofiziološke metode u pokušaju da
diferenciraju decu sa razvojnom disleksijom od tipičnih čitača kao i da
identifikuju mehanizme koji su u osnovi razvojne disleksije.
Cilj ove studije bio je da se ispitaju karakteristike povezivanja
moždanih regija u lokalne i široko-distribuirane neuralne mreže kod
dece sa razvojnom disleksijom tokom čitanja u sebi i da se rezultati
uporede sa rezultatima dece urednih čitača.
EEG signal je snimljen kod petoro dece sa razvojnom disleksijom
(2 dečaka i 3 devojčice) i pet urednih čitača iste polne i uzrasne strukture,
koristeći 10-20 Internacionalni sistem za pozicioniranje elektroda
uz monopolarnu montažu. Dodatne elektrode su korišćene kako
bi se registrovali pokreti očiju. Ispitanici su imali zadatak da u sebi
čitaju jednostavan tekst. Tekst je prezentovan na monitoru računara
na udaljenosti od 40cm od očiju ispitanika. Periodi od 5 sekundi bez
artefakata analizirani su spektralnom analizom (FFT-Fast Fourier
Transform algoritam). Statistički značajne (p<0.01) korelacije u amplitudi
teta ritma (4-7 Hz) između svih 19 elektroda korišćene su za dalje
modeliranje neuralnih mreža.
Ustanovljeno je da su deca sa razvojnom disleksijom formirala
jednu četvoročlanu neuralnu mrežu (centro-parijetalni korteks: C3-
C4-Cz-P4) kao i tri interhemisferne konekcije između homolognih
elektroda leve i desne hemisfere bez kompleksnih intra ili interhemisfernih
konekcija. Deca sa tipičnom funkcijom čitanja su ostvarila daleko
veći broj tročlanih, četvoročlanih i petočlanih zatvorenih mreža u
odnosu na decu sa razvojnom disleksijom. Kognitivna funkcija kao što je čitanje zahteva dinamičku saradnju bliskih i udaljenih kortikalnih
regiona u cilju postizanja paralelnog procesiranja informacije.",
publisher = "Univerzitet u Beogradu - Fakultet za specijalnu edukaciju i rehabilitaciju",
journal = "Specijalna edukacija i rehabilitacija",
title = "Specific features of brain connectivity during silent reading in children with developmental dyslexia, Specifičnosti povezivanja moždanih regija tokom čitanja u sebi kod dece sa razvojnom disleksijom",
number = "3",
pages = "479",
volume = "10, 492",
url = "https://hdl.handle.net/21.15107/rcub_rfasper_3439"
}

Stokić, M., Milosavljević, Z.,& Subotić, M.. (2011). Specific features of brain connectivity during silent reading in children with developmental dyslexia. in Specijalna edukacija i rehabilitacija
Univerzitet u Beogradu - Fakultet za specijalnu edukaciju i rehabilitaciju., 10(3), 479.
https://hdl.handle.net/21.15107/rcub_rfasper_3439

Stokić M, Milosavljević Z, Subotić M. Specific features of brain connectivity during silent reading in children with developmental dyslexia. in Specijalna edukacija i rehabilitacija. 2011;10(3):479.
https://hdl.handle.net/21.15107/rcub_rfasper_3439 .

Stokić, Miodrag, Milosavljević, Zorana, Subotić, Miško, "Specific features of brain connectivity during silent reading in children with developmental dyslexia" in Specijalna edukacija i rehabilitacija, 10, no. 3 (2011):479,
https://hdl.handle.net/21.15107/rcub_rfasper_3439 .

TY  - CONF
AU  - Djoković, Sanja
AU  - Stokić, Miodrag
AU  - Nenadović, Vanja
AU  - Milosavljević, Zorana
AU  - Maksimović, Slavica
PY  - 2010
UR  - http://rfasper.fasper.bg.ac.rs/handle/123456789/4477
AB  - The EEG is a non-invasive method to obtain information about neural
activity associated with cognitive processes. Its great temporal resolution can
provide data regarding the process itself within milliseconds but EEG has
poor spatial resolution. The EEG is based on the voltage difference between
two (or more) electrodes and represents the summation of numerous neuron
activity.
The objective of the study reported was to analyze the EEG signal in verbal
information processing task using spectral analysis for frequency band and
power spectrum extraction. Also we wanted to determine relation between
different frequency bands (Theta – θ, Beta – β and Alpha - α) and their
power spectrum in different parts of the task (perception, retention and
reproduction) for different stimuli (syllables, words, non-words, sentences,
picture situations and picture stories).
The sample comprised of 9 subjects, right-handed, native speakers of Serbian
language with no history of hearing and speech-language disorders.
All subjects were not using any medication that may influence EEG signal.
After the standard procedure of EEG electrodes placement, subjects listened
to a set of auditory presented verbal stimuli. After each stimulus they
had a 2 second retention period time followed by a reproduction period.
They were given 5 seconds for viewing picture situations and a 15 second
period for the picture story followed by a reproduction period.
Differences between EEG frequency bands and power as well as their cortical
representation in verbal information processing task will be discussed.
PB  - Univerzitet u Beogradu – Fakultet za specijalnu edukaciju i rehabilitaciju/ University of Belgrade – Faculty of Special Education and Rehabilitation
C3  - Zbornik radova - „ Smetnje i poremećaji: fenomenologija, prevencija i tretman deo II / Disabilities and Disorders: Phenomenology, Prevention and Treatment Part I I  “,Beograd / Belgrade 2010
T1  - Spectral analysis of eeg signal in verbal information processing task
EP  - 82
SP  - 63
UR  - https://hdl.handle.net/21.15107/rcub_rfasper_4477
ER  - 

@conference{
author = "Djoković, Sanja and Stokić, Miodrag and Nenadović, Vanja and Milosavljević, Zorana and Maksimović, Slavica",
year = "2010",
abstract = "The EEG is a non-invasive method to obtain information about neural
activity associated with cognitive processes. Its great temporal resolution can
provide data regarding the process itself within milliseconds but EEG has
poor spatial resolution. The EEG is based on the voltage difference between
two (or more) electrodes and represents the summation of numerous neuron
activity.
The objective of the study reported was to analyze the EEG signal in verbal
information processing task using spectral analysis for frequency band and
power spectrum extraction. Also we wanted to determine relation between
different frequency bands (Theta – θ, Beta – β and Alpha - α) and their
power spectrum in different parts of the task (perception, retention and
reproduction) for different stimuli (syllables, words, non-words, sentences,
picture situations and picture stories).
The sample comprised of 9 subjects, right-handed, native speakers of Serbian
language with no history of hearing and speech-language disorders.
All subjects were not using any medication that may influence EEG signal.
After the standard procedure of EEG electrodes placement, subjects listened
to a set of auditory presented verbal stimuli. After each stimulus they
had a 2 second retention period time followed by a reproduction period.
They were given 5 seconds for viewing picture situations and a 15 second
period for the picture story followed by a reproduction period.
Differences between EEG frequency bands and power as well as their cortical
representation in verbal information processing task will be discussed.",
publisher = "Univerzitet u Beogradu – Fakultet za specijalnu edukaciju i rehabilitaciju/ University of Belgrade – Faculty of Special Education and Rehabilitation",
journal = "Zbornik radova - „ Smetnje i poremećaji: fenomenologija, prevencija i tretman deo II / Disabilities and Disorders: Phenomenology, Prevention and Treatment Part I I  “,Beograd / Belgrade 2010",
title = "Spectral analysis of eeg signal in verbal information processing task",
pages = "82-63",
url = "https://hdl.handle.net/21.15107/rcub_rfasper_4477"
}

Djoković, S., Stokić, M., Nenadović, V., Milosavljević, Z.,& Maksimović, S.. (2010). Spectral analysis of eeg signal in verbal information processing task. in Zbornik radova - „ Smetnje i poremećaji: fenomenologija, prevencija i tretman deo II / Disabilities and Disorders: Phenomenology, Prevention and Treatment Part I I  “,Beograd / Belgrade 2010
Univerzitet u Beogradu – Fakultet za specijalnu edukaciju i rehabilitaciju/ University of Belgrade – Faculty of Special Education and Rehabilitation., 63-82.
https://hdl.handle.net/21.15107/rcub_rfasper_4477

Djoković S, Stokić M, Nenadović V, Milosavljević Z, Maksimović S. Spectral analysis of eeg signal in verbal information processing task. in Zbornik radova - „ Smetnje i poremećaji: fenomenologija, prevencija i tretman deo II / Disabilities and Disorders: Phenomenology, Prevention and Treatment Part I I  “,Beograd / Belgrade 2010. 2010;:63-82.
https://hdl.handle.net/21.15107/rcub_rfasper_4477 .

Djoković, Sanja, Stokić, Miodrag, Nenadović, Vanja, Milosavljević, Zorana, Maksimović, Slavica, "Spectral analysis of eeg signal in verbal information processing task" in Zbornik radova - „ Smetnje i poremećaji: fenomenologija, prevencija i tretman deo II / Disabilities and Disorders: Phenomenology, Prevention and Treatment Part I I  “,Beograd / Belgrade 2010 (2010):63-82,
https://hdl.handle.net/21.15107/rcub_rfasper_4477 .