NDLI: Impact of head modeling and sensor types in localizing human gamma-band oscillations

Content Provider	IEEE Xplore Digital Library
Author	Mideksa, K.G. Hoogenboom, N. Hellriegel, H. Krause, H. Schnitzler, A. Deuschl, G. Raethjen, J. Heute, U. Muthuraman, M.
Copyright Year	2014
Description	Author affiliation: Inst. for Digital Signal Process. & Syst. Theor., Christian-Albrechts-Univ. of Kiel, Kiel, Germany (Mideksa, K.G.; Heute, U.) \|\| Dept. of Neurology, Heinrich-Heine Univ. Dusseldorf, Düsseldorf, Germany (Hoogenboom, N.; Krause, H.; Schnitzler, A.) \|\| Dept. of Neurology, Christian-Albrechts-Univ. of Kiel, Kiel, Germany (Hellriegel, H.; Deuschl, G.; Raethjen, J.; Muthuraman, M.)
Abstract	An effective mechanism in neuronal communication is oscillatory neuronal synchronization. The neuronal gamma-band (30-100 Hz) synchronization is associated with attention which is induced by a certain visual stimuli. Numerous studies have shown that the gamma-band activity is observed in the visual cortex. However, impact of different head modeling techniques and sensor types to localize gamma-band activity have not yet been reported. To do this, the brain activity was recorded using 306 magnetoencephalography (MEG) sensors, consisting of 102 magnetometers and 102 pairs of planar gradiometers (one measuring the derivative of the magnetic field along the latitude and the other along the longitude), and the data were analyzed with respect to time, frequency, and location of the strongest response. The spherical head models with a single-shell and overlapping spheres (local sphere) have been used as a forward model for calculating the external magnetic fields generated from the gamma-band activity. For each sensor type, the subject-specific frequency range of the gamma-band activity was obtained from the spectral analysis. The identified frequency range of interest with the highest gamma-band activity is then localized using a spatial-filtering technique known as dynamic imaging of coherent sources (DICS). The source analysis for all the subjects revealed that the gradiometer sensors which measure the derivative along the longitude, showed sources close to the visual cortex (cuneus) as compared to the other gradiometer sensors which measure the derivative along the latitude. However, using the magnetometer sensors, it was not possible to localize the sources in the region of interest. When comparing the two head models, the local-sphere model helps in localizing the source more focally as compared to the single-shell head model.
Sponsorship	IEEE Eng. Med. Biol. Soc.
Starting Page	2217
Ending Page	2220
File Size	750971
Page Count	4
File Format	PDF
ISBN	9781424479290
ISSN	1557170X
DOI	10.1109/EMBC.2014.6944059
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-08-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic heads Brain models Visualization Magnetometers Head Time-frequency analysis
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Comparison of EEG and MEG in source localization of induced human gamma-band oscillations during visual stimulus

Modeling of Electromagnetic Stimulation of the Human Brain

BRAIN initiative: Transcranial magnetic stimulation automation and calibration

Theoretical investigation of transcranial alternating current stimulation using realistic head model

Electroconvulsive therapy simulations using an anatomically-realistic head model

High gamma oscillations enhance the subdural visual speller

Sport helmet design and virtual impact test by image-based finite element modeling

A wearable ergonomic gaze-tracker for infants

Stimulation strength and focality of electroconvulsive therapy and magnetic seizure therapy in a realistic head model

Impact of head modeling and sensor types in localizing human gamma-band oscillations

Similar Documents

Comparison of EEG and MEG in source localization of induced human gamma-band oscillations during visual stimulus

Modeling of Electromagnetic Stimulation of the Human Brain

BRAIN initiative: Transcranial magnetic stimulation automation and calibration

Theoretical investigation of transcranial alternating current stimulation using realistic head model

Electroconvulsive therapy simulations using an anatomically-realistic head model

High gamma oscillations enhance the subdural visual speller

Sport helmet design and virtual impact test by image-based finite element modeling

A wearable ergonomic gaze-tracker for infants

Stimulation strength and focality of electroconvulsive therapy and magnetic seizure therapy in a realistic head model

Impact of head modeling and sensor types in localizing human gamma-band oscillations