NDLI: Reorganization of system brain activity while understanding visually presented texts with the increasing completeness of information

Content Provider	Springer Nature Link
Author	Tkacheva, L. O. Gorbuv, I. A. Nasledov, A. D.
Copyright Year	2015
Abstract	The characteristic features of brain activity under variation of the information regimes associated with the stages of understanding visually presented texts in adult subjects (n = 148) have been studied. An original methodology for step-by-step presentation of texts has been developed in order to “detect” the psychophysiological markers of different degrees of understanding and to identify the successive steps in this process. The following three stages were determined by spectral analysis and calculation of the fractal dimension of EEG: “before understanding,” “understanding,” and “after understanding.” The phenomenon of V-shaped changes in the values of EEG fractal dimension was discovered. The first stage is characterized by the increasing power of EEG spectrum in the high frequency range and by the enhanced fractal dimension of EEG, which probably reflects the process of idea generation and the search for solutions. At the next stage (“understanding”), the value of EEG fractal dimension decreases and the spectrum power of the low-frequency range increases, which seems to reflect simplification of invariance to the only valid alternative. The last stage is characterized by an increasing power of EEG spectrum in the high-frequency range and the increasing value of EEG fractal dimension, which may reflect the intensification of brain activity related to solution validation. The findings are a step closer to understanding the neurophysiological mechanisms of system brain activity reorganization while making sense of visually presented texts; they outline the pathway to elimination of the contradictions existing in the literature as concerns the role of high- and low-frequency EEG components as markers of the state of understanding.
Starting Page	11
Ending Page	21
Page Count	11
File Format	PDF
ISSN	03621197
Journal	Human Physiology
Volume Number	41
Issue Number	1
e-ISSN	16083164
Language	English
Publisher	Pleiades Publishing
Publisher Date	2015-02-14
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	stages of making sense of the texts psychosemantics fractal dimension of EEG EEG γ range EEG θ range Life Sciences Human Physiology Biomedicine general
Content Type	Text
Resource Type	Article
Subject	Physiology Physiology (medical)

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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