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<p>Dear Thomas,</p>
<p><br>
</p>
<p>there was a master student in our Group last year (under the
supervision of Benedikt Ehinger & Judith Schepers, in CC) that
worked on the topic. </p>
<p><br>
</p>
<p>She used the HArtMuT model mentioned by Saran to implement ocular
artifacts in EEG simulations. You can find her thesis + code here:
<a moz-do-not-send="true"
href="https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fs-ccs%2F2024-ocular-artifacts-simulation%2Ftree%2Fmain&data=05%7C02%7Cfieldtrip%40science.ru.nl%7C4c9df2a2e8f44bc4558608de6eeeab0c%7C084578d9400d4a5aa7c7e76ca47af400%7C1%7C0%7C639070169131610573%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C60000%7C%7C%7C&sdata=TAdVVXL5xTbHMGTVYMUTfZ7EJa0uVH6rYH0vc06AhY4%3D&reserved=0" originalSrc="https://github.com/s-ccs/2024-ocular-artifacts-simulation/tree/main"
class="moz-txt-link-freetext">https://github.com/s-ccs/2024-ocular-artifacts-simulation/tree/main</a></p>
<p><br>
</p>
<p>The work she did also led to an addition to our simulation
toolbox (in Julia), but for now it's still an open PR: <a
moz-do-not-send="true"
href="https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Funfoldtoolbox%2FUnfoldSim.jl%2Fpull%2F165&data=05%7C02%7Cfieldtrip%40science.ru.nl%7C4c9df2a2e8f44bc4558608de6eeeab0c%7C084578d9400d4a5aa7c7e76ca47af400%7C1%7C0%7C639070169131649337%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C60000%7C%7C%7C&sdata=TeBfGsRIdTlsCB8doqYS2N%2FCZfcCir2I7ZLEBvT%2BGmU%3D&reserved=0" originalSrc="https://github.com/unfoldtoolbox/UnfoldSim.jl/pull/165"
class="moz-txt-link-freetext">https://github.com/unfoldtoolbox/UnfoldSim.jl/pull/165</a></p>
<p><br>
</p>
<p>I am sure you can also write Judith or Bene to discuss this more.</p>
<p><br>
</p>
<p>Cheers,</p>
<p>René</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 2/18/2026 1:04 PM, Sarang S. Dalal
via fieldtrip wrote:<br>
</div>
<blockquote type="cite"
cite="mid:AM9PR01MB7428B35C9064D9A1CF6ABF9BEB6AA@AM9PR01MB7428.eurprd01.prod.exchangelabs.com">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<style type="text/css" style="display:none;">P {margin-top:0;margin-bottom:0;}</style>
<div
style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"
class="elementToProof">
Dear Thomas,</div>
<div
style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"
class="elementToProof">
<br>
</div>
<div
style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"
class="elementToProof">
I haven't tried it myself yet, but check out the <span
class="elementToProof">HArtMuT model:</span></div>
<div
style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"
class="elementToProof">
<span class="elementToProof"> </span><span
style="color: rgb(68, 147, 248);" class="elementToProof"><u><a
style="color: rgb(68, 147, 248); text-align: left;"
rel="nofollow" class="OWAAutoLink"
id="OWAb011b909-6645-b57f-5b93-53bd610e882a"
href="https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fhartmut.neuro.tu-berlin.de%2F&data=05%7C02%7Cfieldtrip%40science.ru.nl%7C4c9df2a2e8f44bc4558608de6eeeab0c%7C084578d9400d4a5aa7c7e76ca47af400%7C1%7C0%7C639070169131690092%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C60000%7C%7C%7C&sdata=uStDPYZVeruznfb2AbOmbmrN3O5NrYKibQz2byVTH8s%3D&reserved=0" originalSrc="https://hartmut.neuro.tu-berlin.de/"
originalsrc="https://hartmut.neuro.tu-berlin.de/"
moz-do-not-send="true">https://www.hartmut.berlin</a></u></span></div>
<div
style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"
class="elementToProof">
<br>
</div>
<div
style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"
class="elementToProof">
<span class="elementToProof">And associated paper:</span></div>
<div
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class="elementToProof">
<span class="elementToProof"><a
href="https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdoi.org%2F10.1088%2F1741-2552%2Faca8ce&data=05%7C02%7Cfieldtrip%40science.ru.nl%7C4c9df2a2e8f44bc4558608de6eeeab0c%7C084578d9400d4a5aa7c7e76ca47af400%7C1%7C0%7C639070169131715690%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C60000%7C%7C%7C&sdata=S2YRhxCR5bTWm6eGM8eI1qXNYLghlTqxEiuNXK381sw%3D&reserved=0" originalSrc="http://doi.org/10.1088/1741-2552/aca8ce"
originalsrc="http://doi.org/10.1088/1741-2552/aca8ce"
moz-do-not-send="true">http://doi.org/10.1088/1741-2552/aca8ce</a></span></div>
<div
style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"
class="elementToProof">
<br>
</div>
<div
style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"
class="elementToProof">
I'm not sure if it's ready to use with FieldTrip (or EEGLAB) out
of the box yet, but maybe with some further hacking/development.</div>
<div
style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"
class="elementToProof">
<br>
</div>
<div
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class="elementToProof">
<span class="elementToProof">There's probably not much else with
available code, but there's several other</span> papers about
modelling the oculogram or retinogram, e.g.:</div>
<div
style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"
class="elementToProof">
<span class="elementToProof"><a
href="https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdoi.org%2F10.1109%2F10.552251&data=05%7C02%7Cfieldtrip%40science.ru.nl%7C4c9df2a2e8f44bc4558608de6eeeab0c%7C084578d9400d4a5aa7c7e76ca47af400%7C1%7C0%7C639070169131734975%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C60000%7C%7C%7C&sdata=EKCgX3hHScE155gJYWvIJLkRynPN5AJBB014LkDx2%2B4%3D&reserved=0" originalSrc="https://doi.org/10.1109/10.552251"
originalsrc="https://doi.org/10.1109/10.552251"
moz-do-not-send="true">https://doi.org/10.1109/10.552251</a></span></div>
<div
style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"
class="elementToProof">
<span class="elementToProof"><a
href="https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fieeexplore.ieee.org%2Fdocument%2F8856323&data=05%7C02%7Cfieldtrip%40science.ru.nl%7C4c9df2a2e8f44bc4558608de6eeeab0c%7C084578d9400d4a5aa7c7e76ca47af400%7C1%7C0%7C639070169131755852%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C60000%7C%7C%7C&sdata=GxQIHtcYQZnSfJBuOUpF0kyiAhXrMaYr3vdjUx7UfsU%3D&reserved=0" originalSrc="https://ieeexplore.ieee.org/document/8856323"
originalsrc="https://ieeexplore.ieee.org/document/8856323"
moz-do-not-send="true">https://ieeexplore.ieee.org/document/8856323</a></span></div>
<div
style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"
class="elementToProof">
<br>
</div>
<div
style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"
class="elementToProof">
Depending on what your goal is, I wonder if it might be simpler
to 'empirically' determine the ocular lead field with
intentional eye movements. Happy to discuss that offline if you
like!</div>
<div
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<br>
</div>
<div
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class="elementToProof">
<span class="elementToProof">Cheers,</span></div>
<div
style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"
class="elementToProof">
<span class="elementToProof">Sarang</span></div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif"
style="font-size:11pt" color="#000000"><b>From:</b> fieldtrip
<a class="moz-txt-link-rfc2396E" href="mailto:fieldtrip-bounces@science.ru.nl"><fieldtrip-bounces@science.ru.nl></a> on behalf of Thomas
Koenig via fieldtrip <a class="moz-txt-link-rfc2396E" href="mailto:fieldtrip@science.ru.nl"><fieldtrip@science.ru.nl></a><br>
<b>Sent:</b> Wednesday 18 February 2026 09:59<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:fieldtrip@science.ru.nl">fieldtrip@science.ru.nl</a>
<a class="moz-txt-link-rfc2396E" href="mailto:fieldtrip@science.ru.nl"><fieldtrip@science.ru.nl></a><br>
<b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:thomas.koenig@unibe.ch">thomas.koenig@unibe.ch</a>
<a class="moz-txt-link-rfc2396E" href="mailto:thomas.koenig@unibe.ch"><thomas.koenig@unibe.ch></a><br>
<b>Subject:</b> [FieldTrip] EEG Leadfield computation for
eyeballs</font>
<div> </div>
</div>
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<p class="x_MsoNormal"><span lang="en-CH"
style="font-size:11.0pt">Dear colleagues,</span></p>
<p class="x_MsoNormal"><span lang="en-CH"
style="font-size:11.0pt"> </span></p>
<p class="x_MsoNormal"><span lang="en-CH"
style="font-size:11.0pt">I am looking for a way to compute
an EEG lead-field matrix for two single dipoles at the
centers of the eyeballs. Has anybody worked on or ideally
solved this problem?
</span></p>
<p class="x_MsoNormal"><span lang="en-CH"
style="font-size:11.0pt"> </span></p>
<p class="x_MsoNormal"><span lang="en-CH"
style="font-size:11.0pt">Thanks, Thomas</span></p>
<p class="x_MsoNormal"><span lang="en-CH"
style="font-size:11.0pt"> </span></p>
<p class="x_MsoNormal"><span style="font-size:11.0pt"> </span></p>
<p class="x_MsoNormal"><span lang="EN-US"
style="font-size:10.0pt; font-family:"Courier New"">Prof. Dr.
Thomas Koenig</span></p>
<p class="x_MsoNormal"><span lang="EN-US"
style="font-size:10.0pt; font-family:"Courier New"">Translational
Research Center</span></p>
<p class="x_MsoNormal"><span lang="EN-US"
style="font-size:10.0pt; font-family:"Courier New"">University
Hospital of Psychiatry and Psychotherapy</span></p>
<p class="x_MsoNormal"><span lang="EN-US"
style="font-size:10.0pt; font-family:"Courier New"">Bolligenstrasse
111</span></p>
<p class="x_MsoNormal"><span lang="EN-US"
style="font-size:10.0pt; font-family:"Courier New"">3000 Bern
60</span></p>
<p class="x_MsoNormal"> </p>
</div>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre wrap="" class="moz-quote-pre">_______________________________________________
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