## Neuromagnetic Source Analysis Using Magnetic Resonance Images for the Construction of Source and Volume Conductor Model

1995
##### Authors
Lütkenhöner, Bernd
Menninghaus, Elisabeth
Steinsträter, Olaf
Gißler, Hans Martin
Journal article
##### Published in
Brain Topography ; 7 (1995), 4. - pp. 291-299
##### Abstract
Sources of the somatosensory evoked fields (SEF) for one subject were estimated using constraints from the magnetic resonance images (MRI) of the same subject. A realistic volume conductor model was shaped corresponding to the inside of the skull. Sources were restricted to a dipole patch riding on the surface of the cortex, reconstructed from the individual MRI. Such a patch can be considered as a uniformly activated cortical area giving rise to distributed currents which flow perpendicular to the cortical surface. Source locations obtained for the SEF in response to separate stimulations of lower lip, first and fifth digit, and collarbone followed the course of the contralateral central sulcus. The order of the estimated source locations was in agreement with the somatosensory homunculus of Penfield and Rasmussen. Similar results were obtained with the simple model of a current dipole in a homogeneous sphere. In contrast, combining a current dipole model with a realistic volume conductor model was rather problematic as it overestimates the radial dipole component by an order of magnitude.
150 Psychology
##### Keywords
Biomagnetism,Source analysis,Anatomical constraints,Current dipole,Dipole patch model,Somatosensory evoked fields
##### Cite This
ISO 690LÜTKENHÖNER, Bernd, Elisabeth MENNINGHAUS, Olaf STEINSTRÄTER, Christian WIENBRUCH, Hans Martin GISSLER, Thomas ELBERT, 1995. Neuromagnetic Source Analysis Using Magnetic Resonance Images for the Construction of Source and Volume Conductor Model. In: Brain Topography. 7(4), pp. 291-299. Available under: doi: 10.1007/BF01195255
BibTex
@article{Lutkenhoner1995Neuro-11145,
year={1995},
doi={10.1007/BF01195255},
title={Neuromagnetic Source Analysis Using Magnetic Resonance Images for the Construction of Source and Volume Conductor Model},
number={4},
volume={7},
journal={Brain Topography},
pages={291--299},
author={Lütkenhöner, Bernd and Menninghaus, Elisabeth and Steinsträter, Olaf and Wienbruch, Christian and Gißler, Hans Martin and Elbert, Thomas}
}

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