Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/47389
Title: Head and shoulders-The impact of an extended head model on the simulation and optimization of transcranial electric stimulation
Authors: VAN HOORNWEDER, Sybren 
Cappozzo, Vittoria
De Herde, Laura
Puonti, Oula
Siebner, Hartwig R.
MEESEN, Raf 
Thielscher, Axel
Issue Date: 2024
Publisher: MIT PRESS
Source: Imaging neuroscience, 2
Abstract: Electric field calculations are increasingly used for dose characterization of transcranial electrical stimulation (tES), but existing open-source head models are inaccurate for extracephalic montages that include electrodes placed on the neck or shoulder. We introduce the "Ernie Extended" model, an MRI- and CT-derived open-source head model extending to the upper shoulder region. Simulations of extracephalic tES targeting the cerebellum and supplementary motor area show significant differences in electric fields when using Ernie Extended compared to the non-extended Ernie model. Additionally, we propose an electrode layout that complements the electroencephalography 10-20 system with extracephalic electrode positions. We demonstrate the use of this layout for optimizing multi-electrode tES montages for cerebellar stimulation, enhancing focality, and reducing off-target stimulation, particularly of the spinal cord. Our results highlight the practical value of the Ernie Extended model for accurately characterizing doses produced by extracephalic tES montages and when targeting more caudal brain regions.
Notes: Van Hoornweder, S (corresponding author), Univ Hasselt, Fac Rehabil Sci, REVAL Rehabil Res Ctr, Diepenbeek, Belgium.; Van Hoornweder, S (corresponding author), Copenhagen Univ Hosp Amager & Hvidovre, Ctr Funct & Diagnost Imaging & Res, Danish Res Ctr Magnet Resonance, Hvidovre, Denmark.
sybren.vanhoornweder@uhasselt.be
Keywords: electric fields;noninvasive brain stimulation;cerebellum;transcranial electrical stimulation;tDCS;extracephalic montage
Document URI: http://hdl.handle.net/1942/47389
e-ISSN: 2837-6056
DOI: 10.1162/imag_a_00379
ISI #: 001530594800005
Rights: 2024 The Authors. Published under a Creative Commons Attribution 4.0 International (CC BY 4.0) license.
Category: A1
Type: Journal Contribution
Appears in Collections:Research publications

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