Modeling and source localization of MEG activities

Brain Topography
S Ueno, K Iramina

Abstract

During the past decade, substantial advances in the understanding of the functional organization of the human brain have been made through the technique of MEG topographic mapping. Most of these investigations were concerned with the estimation and localization of sources which were modeled as single current dipoles positioned in a semi-infinite volume conductor with homogeneous conductivity. However, the sources in the brain are complex, and the head as a volume conductor consists of different materials with different electrical conductivities. The influence of these inhomogeneities on the MEG topography is studied by a computer simulation, modeling the sources as single or multiple dipoles located in inhomogeneous volume conductors. The computer simulation suggests some important aspects in estimation of source localization. The sources of MEG activities in human subject during sleep are also studied. A comparison of simulated MEG topographic patterns with measured data suggests that the sources of K-complexes can be modeled by two current dipoles. Sources for delta waves are analyzed by the FFT technique. The results show that the frequency distributions are different for delta waves measured by MEG and EEG techniques, leadi...Continue Reading

References

Mar 1, 1976·Electroencephalography and Clinical Neurophysiology·J R HughesB N Cuffin
Mar 1, 1989·Electroencephalography and Clinical Neurophysiology·C PantevB Lütkenhöner
Jan 1, 1989·Brain Topography·S J Williamson, L Kaufman
Apr 1, 1966·IEEE Transactions on Bio-medical Engineering·R C BarrM S Spach
Jun 18, 1982·Science·G L RomaniL Kaufman
Jan 1, 1982·Experimental Brain Research·G L RomaniD Brenner
Jan 6, 1978·Science·D BrennerS J Williamson

❮ Previous
Next ❯

Citations

Jan 1, 1993·Brain Topography·M J Peters, H J Wieringa
Jan 1, 1996·Brain Topography·H YoshidaS Ueno
Jan 1, 1996·Brain Topography·Y KinouchiK Matsumoto
Mar 1, 1992·Electroencephalography and Clinical Neurophysiology·S T LuR Hari
Sep 19, 1998·Electroencephalography and Clinical Neurophysiology·S P van den BroekM J Peters
May 24, 2003·Seizure : the Journal of the British Epilepsy Association·Y-Y LinL-T Ho
Mar 27, 2010·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Richard Wennberg
May 25, 1999·IEEE Engineering in Medicine and Biology Magazine : the Quarterly Magazine of the Engineering in Medicine & Biology Society·S Ueno
Nov 3, 2009·NeuroImage·Hiroshige TakeichiHarumitsu Murohashi
Dec 4, 2012·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Richard Wennberg, Douglas Cheyne

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Electroencephalography and Clinical Neurophysiology
S T LuR Hari
Electroencephalography and Clinical Neurophysiology
J NumminenR Hari
Clinical Physics and Physiological Measurement : an Official Journal of the Hospital Physicists' Association, Deutsche Gesellschaft Für Medizinische Physik and the European Federation of Organisations for Medical Physics
P Kemppainen, M Peters
© 2021 Meta ULC. All rights reserved