Subcorticalis ischaemiás agyi károsodást kíséro EEG-komplexitás-változások.

Translated title of the contribution: Changes in EEG-complexity after subcortical ischemic brain damage

M. Molnár, Roland Csuhaj, Szabolcs Horváth, Ildikó Vastagh, Zsófia Anna Gaál, Balázs Czigler, Andrea Bálint, Zoltán Nagy

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

INTRODUCTION: Complexity analysis of the EEG is a relatively new field in theoretical and clinical electrophysiology. The authors present results of EEG-analysis in a patient with stroke, utilizing the sensitivity of the new procedures with respect to linear and nonlinear synchronization. PARTICIPANTS AND METHODS: The EEG (19 channels) was recorded in a patient with subcortical unilateral ischaemic completed stroke involving the frontoparietal white matter while leaving the cortex intact and in 12 healthy controls in eyes open and in eyes closed conditions. RESULTS: In the patient, increased Omega-complexity was found in slow (delta, theta) and lower alpha frequencies in the side of the stroke and in high frequencies (beta2 in eyes closed, alpha2, beta1 and beta2 in eyes open conditions) in the intact side. Synchronization likelihood was higher in the ischaemic side in the beta2 (eyes closed) and both in the beta1 and beta2 (eyes open) frequencies. Increasing Omega-complexity caused by eyes opening was markedly reduced in the patient in the beta frequencies compared to that seen in the controls. The difference was more conspicuous in the side of the infarct and involved not only the beta but also the alpha frequencies as well. Opening the eyes decreased synchronization likelihood in all frequency bands in the controls and also in the patient except the alpha2, beta1 and beta2 bands in the side of the lesion. CONCLUSIONS: The increased Omega-complexity and decreased synchronization likelihood in the slow frequencies in the infarcted side is probably the result of lesioned interneuronal connections lowering the level of cooperation of neuronal systems involved in this type of activity. The increased Omega-complexity and decreased synchronization likelihood caused by eyes opening could not be observed in the beta and alpha frequencies in the side of the lesion, possibly caused by damaged thalamocortical connections.

Original languageHungarian
Pages (from-to)185-192
Number of pages8
JournalIdeggyógyászati szemle
Volume59
Issue number5-6
Publication statusPublished - May 20 2006

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Electroencephalography
Brain
Stroke
Electrophysiology
Systems Analysis

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Molnár, M., Csuhaj, R., Horváth, S., Vastagh, I., Gaál, Z. A., Czigler, B., ... Nagy, Z. (2006). Subcorticalis ischaemiás agyi károsodást kíséro EEG-komplexitás-változások. Ideggyógyászati szemle, 59(5-6), 185-192.

Subcorticalis ischaemiás agyi károsodást kíséro EEG-komplexitás-változások. / Molnár, M.; Csuhaj, Roland; Horváth, Szabolcs; Vastagh, Ildikó; Gaál, Zsófia Anna; Czigler, Balázs; Bálint, Andrea; Nagy, Zoltán.

In: Ideggyógyászati szemle, Vol. 59, No. 5-6, 20.05.2006, p. 185-192.

Research output: Contribution to journalArticle

Molnár, M, Csuhaj, R, Horváth, S, Vastagh, I, Gaál, ZA, Czigler, B, Bálint, A & Nagy, Z 2006, 'Subcorticalis ischaemiás agyi károsodást kíséro EEG-komplexitás-változások.', Ideggyógyászati szemle, vol. 59, no. 5-6, pp. 185-192.
Molnár M, Csuhaj R, Horváth S, Vastagh I, Gaál ZA, Czigler B et al. Subcorticalis ischaemiás agyi károsodást kíséro EEG-komplexitás-változások. Ideggyógyászati szemle. 2006 May 20;59(5-6):185-192.
Molnár, M. ; Csuhaj, Roland ; Horváth, Szabolcs ; Vastagh, Ildikó ; Gaál, Zsófia Anna ; Czigler, Balázs ; Bálint, Andrea ; Nagy, Zoltán. / Subcorticalis ischaemiás agyi károsodást kíséro EEG-komplexitás-változások. In: Ideggyógyászati szemle. 2006 ; Vol. 59, No. 5-6. pp. 185-192.
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abstract = "INTRODUCTION: Complexity analysis of the EEG is a relatively new field in theoretical and clinical electrophysiology. The authors present results of EEG-analysis in a patient with stroke, utilizing the sensitivity of the new procedures with respect to linear and nonlinear synchronization. PARTICIPANTS AND METHODS: The EEG (19 channels) was recorded in a patient with subcortical unilateral ischaemic completed stroke involving the frontoparietal white matter while leaving the cortex intact and in 12 healthy controls in eyes open and in eyes closed conditions. RESULTS: In the patient, increased Omega-complexity was found in slow (delta, theta) and lower alpha frequencies in the side of the stroke and in high frequencies (beta2 in eyes closed, alpha2, beta1 and beta2 in eyes open conditions) in the intact side. Synchronization likelihood was higher in the ischaemic side in the beta2 (eyes closed) and both in the beta1 and beta2 (eyes open) frequencies. Increasing Omega-complexity caused by eyes opening was markedly reduced in the patient in the beta frequencies compared to that seen in the controls. The difference was more conspicuous in the side of the infarct and involved not only the beta but also the alpha frequencies as well. Opening the eyes decreased synchronization likelihood in all frequency bands in the controls and also in the patient except the alpha2, beta1 and beta2 bands in the side of the lesion. CONCLUSIONS: The increased Omega-complexity and decreased synchronization likelihood in the slow frequencies in the infarcted side is probably the result of lesioned interneuronal connections lowering the level of cooperation of neuronal systems involved in this type of activity. The increased Omega-complexity and decreased synchronization likelihood caused by eyes opening could not be observed in the beta and alpha frequencies in the side of the lesion, possibly caused by damaged thalamocortical connections.",
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AU - Csuhaj, Roland

AU - Horváth, Szabolcs

AU - Vastagh, Ildikó

AU - Gaál, Zsófia Anna

AU - Czigler, Balázs

AU - Bálint, Andrea

AU - Nagy, Zoltán

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N2 - INTRODUCTION: Complexity analysis of the EEG is a relatively new field in theoretical and clinical electrophysiology. The authors present results of EEG-analysis in a patient with stroke, utilizing the sensitivity of the new procedures with respect to linear and nonlinear synchronization. PARTICIPANTS AND METHODS: The EEG (19 channels) was recorded in a patient with subcortical unilateral ischaemic completed stroke involving the frontoparietal white matter while leaving the cortex intact and in 12 healthy controls in eyes open and in eyes closed conditions. RESULTS: In the patient, increased Omega-complexity was found in slow (delta, theta) and lower alpha frequencies in the side of the stroke and in high frequencies (beta2 in eyes closed, alpha2, beta1 and beta2 in eyes open conditions) in the intact side. Synchronization likelihood was higher in the ischaemic side in the beta2 (eyes closed) and both in the beta1 and beta2 (eyes open) frequencies. Increasing Omega-complexity caused by eyes opening was markedly reduced in the patient in the beta frequencies compared to that seen in the controls. The difference was more conspicuous in the side of the infarct and involved not only the beta but also the alpha frequencies as well. Opening the eyes decreased synchronization likelihood in all frequency bands in the controls and also in the patient except the alpha2, beta1 and beta2 bands in the side of the lesion. CONCLUSIONS: The increased Omega-complexity and decreased synchronization likelihood in the slow frequencies in the infarcted side is probably the result of lesioned interneuronal connections lowering the level of cooperation of neuronal systems involved in this type of activity. The increased Omega-complexity and decreased synchronization likelihood caused by eyes opening could not be observed in the beta and alpha frequencies in the side of the lesion, possibly caused by damaged thalamocortical connections.

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