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Biomedical subjects

M B Kostiunina

Publications and source records attributed to M B Kostiunina.

17 recordsLinked to original sources
PubMed2003

[Use of spectral correlation method in a study of human emotional states].

Application of a new approach to EEG analysis, i.e. of the method of spectral correlation, permitted identification of significant differences in spatial distribution of spectral power correlation for emotions of different quality, namely: anger and fear. It was shown that against the background of fear the topographic distribution of intracortical connections in the delta band was more extensive and included frontal, central, temporal, parietal and occipital regions. The emotion of anger evoked changes in the picture of spatial distribution of intracortical connections in the alpha band which resulted in appearance of a powerful focus of connections in the frontal regions. The greatest number of connections was found for the emotion of anger in the beta band--22 statistically significant correlations. Thus, a generalization of connections in the EEG high frequency bands is noted for the emotion of anger which is not characteristic of the emotion of fear.

Adult↗
PubMed2002

[The spatial distribution of asymmetry coefficients of the brain bioelectric activity while experiencing negative emotions].

Statistically significant differences were revealed in the spatial distribution of the asymmetry coefficients in the brain bioelectrical activity for different negative emotions. In case of the asthenic emotion (anger) the asymmetry coefficients in the beta-2 band were positive and greater in the frontal part of the brain as compared to the background. When the subjects experienced (imagined) the asthenic emotion (grief), the asymmetry coefficients were negative in the beta-1 band and a generalized growth of slow-wave activity was observed.

Adult↗
PubMed1987

[Characteristics of the frequency component of EEG alpha rhythm of patients with neurosis-like schizophrenia (based on spectral analysis data)].

In 20 patients with neurosis-like schizophrenia and in 10 healthy subjects the authors, using the spectral analysis, assessed the composition of the alpha-range of the baseline EEG and studied the peculiarities of the frequency components of alpha-rhythm in various states. The patients were characterized by multimodality of the baseline EEG. The patients (versus the normal subjects) presented significantly different types of response of the main frequency components of EEG alpha-rhythm to the hyperventilation test.

Adolescent↗
PubMedDate not supplied

[Quantitative analysis of human emotions].

Experimental models describing the relationship between emotional stress, information, and needs are considered. The approach used is based on mental reproduction of emotional events such as joy, anger, fear, and distress. Experimental verification of the models revealed the presence of a linear component in the formula that relates the parameters of emotions, needs, and information.

Emotions↗
PubMedDate not supplied

[The participation of cortical brain areas in the processes of perceiving and reproducing human emotional states].

New method of mapping intracortical interactions was used to study the participation of cortical brain areas in the processes of perception and of mental reproduction of emotional states in humans. When an emotion was identified, the activity focus was observed in the left temporal cortex. If emotion was not identified, the temporal focus did not appear, but activity foci were seen in frontal regions of both hemispheres. When emotional states were mentally reproduced, activity foci were encountered mostly in the frontal cortical areas.

Adolescent↗
PubMedDate not supplied

[Psychophysiological study of the information theory of emotions using the model of positive emotion].

The pattern of inter-hemisphere distribution of EEG amplitude and frequency as a function of the levels of emotional experience and motivation as well as probability of the goal achievement was studied in 20 subjects. An emotional state was evoked by simulating emotionally colored events. A modified test of Prise et al. (1985) was used to evaluate the level of motivation for the simulated event as well as the probability of goal achievement from the lengths of line segments marked by the subjects. Here we studied simulated emotion of joy. The highest correlation coefficients were observed between the awareness and alpha activity in the both hemispheres. The levels of emotional experience and motivation inversely correlated with the delta and theta activity mostly in the left hemisphere. The beta activity correlated with both the emotional and motivation levels.

Adult↗
PubMedDate not supplied

[The electroencephalographic and autonomic correlates of the mental reproduction of emotional states].

The present study is devoted to the analysis of changes of bioelectrical and vegetative indices at mental reproduction of emotional states by man. Analysis is conducted of the data of mapping of intracortical interactions depending on the dynamics of R-R interval changes. Two stages of mental reproduction of emotions are revealed which are characterized by the presence of different centers of integration--in the frontal and temporal parts of the brain cortex. It is shown that at maximum emotional stress the integration center shifts from the frontal regions to the temporal region of the left hemisphere.

Adolescent↗
PubMedDate not supplied

[The frequency characteristics of EEG spectra in emotions].

The study is devoted to analysis of EEG frequency spectral characteristics during mental reproduction by subjects of joy, anger, fear, and sorrow. Significant differences between the emotional states are revealed in the points C4, T4, F3, O1 by the mean alpha-frequency (p < 0.05). Two opposite tendencies are revealed, i.e., joy and anger are mainly characterized by an increase of the alpha peak frequency in respect to the background values, whereas its decrease is seen in fear and sorrow.

Adolescent↗
PubMedDate not supplied

[A method of mapping intracortical interactions during perception and reproduction of emotions].

By a new method of mapping intracortical interaction participation of the cerebral cortical zones in the process of perception and mental reproduction of human emotional states was studied. At identification of emotions the maximum value of connections was found in the left cortical temporal area. At mental reproduction of emotional states the maximum value of connections was found predominantly in the frontal cortical areas and left temporal cortical zone.

Adolescent↗
PubMedDate not supplied

[The human electroencephalogram during the mental recall of emotionally colored events].

The role of the left and right brain hemispheres in mental reproduction of emotional states by human subjects was analyzed using a new technique of EEG power spectral analysis in narrow frequency bands. At the maximal emotional tension joy was shown to be characterized by an increase in the alpha peak frequency. On the contrary, sorrow accompanied by a decrease in this value. We think that the left hemisphere (as well as the right one) participate in the development of emotional reactions.

Adolescent↗