Numerical investigation of the electric field distribution induced in the brain by transcranial magnetic stimulation
Numerical investigation of the electric field distribution induced in the brain by transcranial magnetic stimulation
Results are presented on the prediction and optimisation of the electric field distribution obtained during transcranial magnetic stimulation (TMS) for deep neuron stimulation by using the finite-element method (FEM) in three dimensions. The effects of the geometrical models of the head on the distribution and penetration of the electric field induced in the brain during TMS are examined. For a magnetic field that can penetrate deeply and safely to activate the brain’s central structures, an iron core is introduced and its core shape is optimised using continuum design sensitivity analysis (CDSA) combined with the FEM. It is revealed that the incorporation of an accurate brain model in terms of shape as well as conductivity values is crucial for improved estimation of the field distribution. The introduction of an optimised iron core is shown to enhance the magnitude and localisation of the electric field induced inside the brain.
TMS, magnetic stimulation, transcranial, modelling, optimisation, design, electromagnetics
479-483
Kim, D.
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Loukaides, N.
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Sykulski, J.K.
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Georghiou, G. E.
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November 2004
Kim, D.
f41dc51b-2766-4d68-a3ed-7757ee2ae76e
Loukaides, N.
4ce97a28-c4c9-44f6-a6fe-f98f5a862930
Sykulski, J.K.
d6885caf-aaed-4d12-9ef3-46c4c3bbd7fb
Georghiou, G. E.
27c937e2-8024-4c7e-86be-5656ef10cf64
Kim, D., Loukaides, N., Sykulski, J.K. and Georghiou, G. E.
(2004)
Numerical investigation of the electric field distribution induced in the brain by transcranial magnetic stimulation.
IEE Proceedings - Science, Measurement and Technology, 151 (6), .
Abstract
Results are presented on the prediction and optimisation of the electric field distribution obtained during transcranial magnetic stimulation (TMS) for deep neuron stimulation by using the finite-element method (FEM) in three dimensions. The effects of the geometrical models of the head on the distribution and penetration of the electric field induced in the brain during TMS are examined. For a magnetic field that can penetrate deeply and safely to activate the brain’s central structures, an iron core is introduced and its core shape is optimised using continuum design sensitivity analysis (CDSA) combined with the FEM. It is revealed that the incorporation of an accurate brain model in terms of shape as well as conductivity values is crucial for improved estimation of the field distribution. The introduction of an optimised iron core is shown to enhance the magnitude and localisation of the electric field induced inside the brain.
Text
IEE-Proc-vol151no6Nov2004page479.pdf
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Published date: November 2004
Keywords:
TMS, magnetic stimulation, transcranial, modelling, optimisation, design, electromagnetics
Organisations:
EEE
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Local EPrints ID: 259577
URI: http://eprints.soton.ac.uk/id/eprint/259577
ISSN: 1350-2344
PURE UUID: 14e0ed8e-0470-4cbc-bd06-5bff13405932
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Date deposited: 02 Aug 2004
Last modified: 15 Mar 2024 02:34
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Contributors
Author:
D. Kim
Author:
N. Loukaides
Author:
J.K. Sykulski
Author:
G. E. Georghiou
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