Abstract—
Recently, there has been considerable interest in the mechanism of cooperation between the frontoparietal system and the default system, since their “pre-tuning” at rest and the subsequent functional interaction dynamics is associated with individual variety of strategies for task performance upon creativity testing. To study the EEG correlates of these strategies, regional features of resting state ∆- and β-oscillations were analyzed and compared with the results from preliminary creativity and intelligence testing in 37 university students (18 ± 1.1 years; 27 females and 10 males). The response originality indices in the creativity tests were calculated using databases previously designed by the authors for the “Circles,” “Incomplete figures,” and “Unusual use of ordinary objects” subtests and an expert assessment of originality of the sentences composed of words belonging to different semantic categories. The intelligence verbal and figurative components were assessed according to the Amthauer intelligence structure subtests. Using cluster analysis of the listed creativity and intelligence indices, two groups of study participants were identified. One of the groups (GRCIQ) was characterized by a combination of higher values of intelligence and originality of responses in the tasks that required the rejection of stereotypical ideas upon limited search time, and the other group (GRC), characterized by relatively lower intelligence, but high originality of solving the problem upon the creativity testing with a variety of stimuli and without time limits. These two groups differed in regional organization of the ∆- and β2-rhythm power and in the rhythm correlation patterns. In particular, GRCIQ is characterized by generalized high-frequency β-activity and its correlation with low-frequency biopotentials in the frontal cortex, while GRC is characterized by cortical mosaic of the β2-activity with its diffusely distributed correlations with the ∆-rhythm with the exception of the anterior frontal areas. The discovered effects can be considered as a pre-tuning to the “intelligent” search strategy for an original solution in the conditions of resistance to fixation on a stereotyped idea in GRCIQ or to solutions based on spontaneous search for distant associations in GRC.
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ACKNOWLEDGMENTS
The author thanks A.A. Yashanina, E.A. Khoroshavtseva, and K.D. Krivonogova, who took part in the recording and primary EEG processing, as well as in the psychometric testing of creativity.
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Statement of compliance with standards of research involving humans as subjects. All studies were carried out in accordance with the principles of biomedical ethics formulated in the Declaration of Helsinki of 1984 and its subsequent updates, and approved by local ethics committee of the Faculty of Humanities, Novosibirsk State Technical University (Novosibirsk). Each participant in the study provided a signed voluntary written informed consent after explaining the potential risks and benefits, as well as the nature of the upcoming study.
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Translated by N. Maleeva
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Razumnikova, O.M. Frontoparietal Patterns of Delta and Beta EEG Oscillations as Markers of Creativity Strategies. Hum Physiol 49, 308–315 (2023). https://doi.org/10.1134/S0362119723700330
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DOI: https://doi.org/10.1134/S0362119723700330