Zh Vyssh Nerv Deyat+
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Zh Vyssh Nerv Deyat+ · Jan 2009
[The electrode for selective nociceptive stimulation: use experience and prospect for application in nociception studies in a human].
Electrode for selective nociception specific stimulation was described by H. Kaube et al. in 2000. The aim of this work was to test this electrode in assessment of nociceptive reactions of the segmental and suprasegmental levels. ⋯ The dominance of the late components (100-300 ms) considered to be of nociceptive origin was revealed in the pattern of evoked potentials. Thus, the electrode assures a high degree of selectivity of the pain-specific stimulation. Its adaptation for assessment of various nociceptive reactions can perfect the neurophysiological methods of nociception studies.
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Zh Vyssh Nerv Deyat+ · Jan 2009
[Functional asymmetry in human background spatial EEG-organization].
Researched features of the spatial organization of the brain cortex biopotentials (SOB) for 143 subjects in the age of from 20 till 45 years, in which topographical maps there were different forms of asymmetry with dominance of focuses of maximum biopotential correlations in the following zones: 1) in right hemisphere, 2) in left hemisphere, 3) in frontal areas, 4) in occipital area, 5) in the left, frontal area and right occipital, 6) in right frontal area and left occipital. From 679 1.5-2-mm EEG fragments variant 1 met at 8.39 of % of cases, variant 2--at 12.22 of %, variant 3--at 8.39 of %, variant 4--at 5.62 of %, variant 5--at 15.46 of %, variant 6--at 12.37 of %. ⋯ Relative analysis of parameters SOB at the different forms of asymmetry: spatial synchronization (linear processes), spatial disorder (nonlinear processes), coherence and spectral power of bioponentials, and also relationship of coherence and spectral power ("informational - energetic" parameter, reflecting degree expenses of a brain realization of information processes, has revealed authentic differences). The obtained data are considered from the point of view of reflectance in parameters of asymmetry background SOB the variability of the functional state of the man, level of consciousness and "cost" of information processes.