NDLI: Modelling of brain sources using the modified saint Venant's method in FEM resolution of EEG forward problem

Content Provider	IEEE Xplore Digital Library
Author	Medani, T. Lautru, D. Schwartz, D. Ren, Z. Sou, G.
Copyright Year	2015
Description	Author affiliation: Electron. & Electromagn. Lab., UPMC Univ. Paris 06, Paris, France (Medani, T.; Ren, Z.; Sou, G.) \|\| Energy Mech. Electromagn. Lab., Univ. Paris Ouest Nanterre La Defense, Ville-d'Avray, France (Lautru, D.) \|\| Brain & Spine Inst. (ICM), Inserm-UPMC, Paris, France (Schwartz, D.)
Abstract	In order to reconstruct the electrical brain activities, both the inverse and the forward problems have to be solved. The inverse problem consists of finding brain activities (sources) which are responsible for the measured signals. The forward problem is calculating the potentials at the sensor electrodes placed on the scalp from a given source inside the brain. Its resolution involves models of head and models of sources. The finite-element method (FEM) is investigated in this paper for its ability to model realistic geometry and physical proprieties. However, using this method, the point source introduces singularity in the calculation and impacts the accuracy. Different techniques have been developed to avoid this singularity but the accuracy of the most techniques decrease as the current dipole approaches the interface of different tissues with different conductivities. In this paper, the forward problem is solved by the FEM using a spherical head model and the saint Venant's principle is used to avoid the source's singularity. Near the interface of different brain tissues, a modification on the saint Venant's method is introduced. Simulation results show that this new modification gives good accuracy as compared with the traditional approaches.
Starting Page	1080
Ending Page	1083
File Size	787137
Page Count	4
File Format	PDF
ISBN	9781467363891
DOI	10.1109/NER.2015.7146815
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-04-22
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electric potential Saint Venant's method Head EEG Brain models Electroencephalography Finite element analysis Mathematical model Finite element methods
Content Type	Text
Resource Type	Article

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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
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