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ISSN 2522-9028 (Print)
ISSN 2522-9036 (Online)
DOI: https://doi.org/10.15407/fz

Fiziologichnyi Zhurnal

is a scientific journal issued by the

Bogomoletz Institute of Physiology
National Academy of Sciences of Ukraine

Editor-in-chief: V.F. Sagach

The journal was founded in 1955 as
1955 – 1977 "Fiziolohichnyi zhurnal" (ISSN 0015 – 3311)
1978 – 1993 "Fiziologicheskii zhurnal" (ISSN 0201 – 8489)
1994 – 2016 "Fiziolohichnyi zhurnal" (ISSN 0201 – 8489)
2017 – "Fiziolohichnyi zhurnal" (ISSN 2522-9028)

Fiziol. Zh. 2005; 51(2): 8-16


Effect of tonic painful squeezing ofthe distal joint of the little finger onthe srectral power of differentfrequency ranges in eeg activity

V. V. Garkavenko, A. V. Gorkovenko,O. P. Mankivska, A. M. Shevko, O. I. Kostyukov

    O.O.Bogomoletz Institute of Physiology, National Academyof Science of Ukraine, Kyiv


Abstract

EEG changes caused by the tonic squeezing of the distal joint of the little finger of both hands were investigated on 12 healthy volunteers, age 20-56 (average 35.5). Pain stimulation applied to the right hand was stronger than that applied to the left. Power spectra was measured in 7 EEG ranges: ? – 2–4, ?1 – 4– 6, ?2 – 6–8, ?1 – 8–10,5, ?2 – 10,5–13, ?1 – 13–20 and ?2 – 20– 35 Hz. The increase of power in the different areas of the cerebral cortex was a dominant effect of pain influence in ?1 and ?2 as well as in both ?-ranges. The pain stimulation influ- enced EEG-parameters bilaterally. It was supposed that incre- ment of ?-synchronization during peripheral pain reflected the inhibition processes in the thalamo-cortical system. This process most likely limited the area of afferent activation in the cortex. The topography of the significant power changes in ?1- and ?2-ranges was different during strong pain as well as after its cessation. Different parameters of functional brain activity during pain stimulation seemed to be reflected in ?1- and ?2-rhythms. The significant increment of spectral power in ?- , ?- and ?2-ranges was demonstrated after cessation of strong pain in comparison to the pre-pain condition. Thus, the changes in EEG parameters reflect the latent and inertial character of the pain effects

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