NDLI: Coherence analysis of the ongoing EEG by means of microstates of synchronous oscillations

Content Provider	IEEE Xplore Digital Library
Author	Schack, B. Seidel, G. Krause, W. Heinrich, F. Krause, U.
Copyright Year	2001
Description	Author affiliation: Inst. of Med. Stat. Comput. Sci. & Documentation, Jena Univ., Germany (Schack, B.)
Abstract	The sensitivity of instantaneous EEG coherence for the investigation of elementary thinking processes was shown by several authors. Similarly to EP analysis the statistical validation of the results is based on the multiple repetition of the same task. This approach is not possible for complex unreproducible thinking processes of long duration as e.g., solving mathematical problems. Classical coherence analysis of long periods of the EEG suffers from the loss of temporal information. The paper presents a temporal coherence analysis of the ongoing EEG preserving the temporal information of long cognitive processes. The main point of the method is the decomposition of the whole time interval in microstates of synchronous oscillations. The calculation of instantaneous coherence for multiple electrode pairs yields in a time-dependent high-dimensional coherence vector. A segmentation algorithm dissects the whole process into time intervals with stable coherence vectors the so-called microstates of oscillations. A subsequent clustering procedure into a small number of classes results in a sequence of prototypical microstates, which may be modeled by a Markovian process. Special entropy parameters characterize the strength of concatenation of different microstates. The method was applied in order to understand the special brain functioning of mathematically highly gifted subjects.
Starting Page	1792
Ending Page	1795
File Size	560303
Page Count	4
File Format	PDF
ISBN	0780372115
ISSN	1094687X
DOI	10.1109/IEMBS.2001.1020568
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-10-25
Publisher Place	Turkey
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electroencephalography Coherence Brain modeling Entropy Information analysis Prototypes Computer science Clustering algorithms Frequency synchronization Frequency estimation
Content Type	Text
Resource Type	Article

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
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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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