Medical Radiology and Radiation Safety. 2013. Vol. 58. No. 4. P. 48–54

RADIATION MEDICINE

N.A. Isaeva, F.S. Torubarov, Z.F. Zvereva, S.N. Lukyanova

Brain Bioelectric Activity of Bilibinsky Atomic Power Station Workers Having Various Degree of Risk of the Ishemic Stroke

Burnasyan Federal Medical Biophysical Center of FMBA, Moscow, Russia, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract

Purpose: To study the features of bioelectric activity of a brain on indicators EEG in workers of Bilibinsky NPP with various degree of. Materials and methods: It was an examination of 99 workers (75 men, 24 females) of Bilibinsky NPP with various degree of an ischemic stroke risk level revealed by a method of screening analysis using the 5-faktor Framingemsky’ scale. EEG research was done on analyzer EEGA-21/26 Encephalan-131-03 (MTDICOM MTD, Taganrog). Analysis EEG carried out visually with attraction on the analysis of spectral capacity of biopotentials and dipole sources of bioelectric activity localizations. Results: In the absence of an ischemic stroke risk the EEG-indicators testified the safety of the cortical structures functions, with few cases of moderate deviations at trunk level. At low degree of risk (not more than twice above the population level) at half surveyed the signs testifying the infringement of mechanisms of formation of a functional condition of a brain as on cortical, and on truncal levels, with involving thalamus and hypothalamus the formations (according to dipole sources of bioelectric activity localization) came to light. Stability of work of the mechanisms regulating functional activity of a brain (prevailed EEG with steady dynamics) remained. At average degree of risk (not more than 6 times above population level) EEG signs of infringement of functions cortical structures and truncal formations on diencephalic level accrued, prevailed EEG with unstable dynamics. At high degree of risk (more than 6 times above population level) EEG signs of infringement of mechanisms of formation of a functional condition of a brain on cortical and truncal levels and instability of the mechanisms regulating functional activity of a brain, became dominating.

Conclusion: The revealed changes of indicators EEG can testify the infringements of a functional condition of the brain which degree of expressiveness is proportional to an ischemic stroke risk level.

Key words: risk factors, ischemic stroke, EEG