Electric field distribution in a finite-volume head model of deep brain stimulation

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Title: Electric field distribution in a finite-volume head model of deep brain stimulation
Authors: Grant, Peadar F.
Lowery, Madeleine M.
Permanent link: http://hdl.handle.net/10197/3834
Date: Nov-2009
Abstract: This study presents a whole-head finite element model of deep brain stimulation to examine the effect of electrical grounding, the finite conducting volume of the head, and scalp, skull and cerebrospinal fluid layers. The impedance between the stimulating and reference electrodes in the whole-head model was found to lie within clinically reported values when the reference electrode was incorporated on a localized surface in the model. Incorporation of the finite volume of the head and inclusion of surrounding outer tissue layers reduced the magnitude of the electric field and activating function by approximately 20% in the region surrounding the electrode. Localized distortions of the electric field were also observed when the electrode was placed close to the skull. Under bipolar conditions the effect of the finite conducting volume was shown to be negligible. The results indicate that, for monopolar stimulation, incorporation of the finite volume and outer tissue layers can alter the magnitude of the electric field and activating function when the electrode is deep within the brain, and may further affect the shape if the electrode is close to the skull.
Type of material: Journal Article
Publisher: Elsevier
Copyright (published version): 2009 IPEM
Keywords: Deep brain stimulation;Finite element model;Volume conduction
Subject LCSH: Brain stimulation
Finite element method
Electric stimulation
DOI: 10.1016/j.medengphy.2009.07.006
Language: en
Status of Item: Peer reviewed
Appears in Collections:Electrical and Electronic Engineering Research Collection

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