[FieldTrip] EEG Leadfield computation for eyeballs

[Sarang S. Dalal]

Dear Thomas,

I haven't tried it myself yet, but check out the HArtMuT model:
 https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.hartmut.berlin%2F&data=05%7C02%7Cfieldtrip%40science.ru.nl%7C7c5935d7611740b3e78408de6ee5ed7e%7C084578d9400d4a5aa7c7e76ca47af400%7C1%7C0%7C639070130965176798%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=Yvzlb9aoXmGjD5NYepBVAqyxzToKWnxBUYl68uCBYJE%3D&reserved=0<https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fhartmut.neuro.tu-berlin.de%2F&data=05%7C02%7Cfieldtrip%40science.ru.nl%7C7c5935d7611740b3e78408de6ee5ed7e%7C084578d9400d4a5aa7c7e76ca47af400%7C1%7C0%7C639070130965229860%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=hi4aYVkSxvfQRTEtt9q6RCWuHABQmgg7N9WntFBqhgc%3D&reserved=0>

And associated paper:
https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdoi.org%2F10.1088%2F1741-2552%2Faca8ce&data=05%7C02%7Cfieldtrip%40science.ru.nl%7C7c5935d7611740b3e78408de6ee5ed7e%7C084578d9400d4a5aa7c7e76ca47af400%7C1%7C0%7C639070130965278315%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=KZ%2FXg8Lr%2BmtTc0rd2MJTAIZZ3DIideP%2Ba%2F4dm%2FVlnQc%3D&reserved=0

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.

There's probably not much else with available code, but there's several other papers about modelling the oculogram or retinogram, e.g.:
https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdoi.org%2F10.1109%2F10.552251&data=05%7C02%7Cfieldtrip%40science.ru.nl%7C7c5935d7611740b3e78408de6ee5ed7e%7C084578d9400d4a5aa7c7e76ca47af400%7C1%7C0%7C639070130965316314%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=fWmudMEd2TPdxnbGt2YMkGByXKSWjdDIPxjtWa72zzU%3D&reserved=0
https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fieeexplore.ieee.org%2Fdocument%2F8856323&data=05%7C02%7Cfieldtrip%40science.ru.nl%7C7c5935d7611740b3e78408de6ee5ed7e%7C084578d9400d4a5aa7c7e76ca47af400%7C1%7C0%7C639070130965358513%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=XRa2BqxxJPDKwV%2B80dzYXjjdYEkj7VCk7qoM1DbM4zI%3D&reserved=0

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!

Cheers,
Sarang
________________________________
From: fieldtrip <fieldtrip-bounces at science.ru.nl> on behalf of Thomas Koenig via fieldtrip <fieldtrip at science.ru.nl>
Sent: Wednesday 18 February 2026 09:59
To: fieldtrip at science.ru.nl <fieldtrip at science.ru.nl>
Cc: thomas.koenig at unibe.ch <thomas.koenig at unibe.ch>
Subject: [FieldTrip] EEG Leadfield computation for eyeballs


Dear colleagues,



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?



Thanks, Thomas





Prof. Dr. Thomas Koenig

Translational Research Center

University Hospital of Psychiatry and Psychotherapy

Bolligenstrasse 111

3000 Bern 60


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