[FieldTrip] beamformer on EEG data

Wu, Jia jia.wu at yale.edu
Tue Sep 1 23:20:14 CEST 2015


Here is the most problematic part of my analysis.

When I did not align electrode positions with headmodel, I was able to get interpolated source signal that resembled a brain.

However if I managed to align electrode positions with headmodel, (then build the correct leadfield), the interpolated source did not resemble a brain.

Anybody has a clue what was going on?

From: fieldtrip-bounces at science.ru.nl [fieldtrip-bounces at science.ru.nl] on behalf of Wu, Jia [jia.wu at yale.edu]
Sent: Monday, August 31, 2015 4:33 PM
To: FieldTrip discussion list
Subject: [FieldTrip] beamformer on EEG data

I'm new to the community and fieldtrip. I'm trying to use beamformer to do oscillatory source localization on some EEG data.

I thought I stumbled upon some tutorial specific on this top on the fieldtrip wiki, but I couldn't find it any more. Most source localization materials seem to be for MEG data. And I've been confused about the steps to build a correct headmodel, sourcemodel, leadfield based on only EEG information.

Anybody has a quick link to the tutorial? If such tutorial doesn't exist I will email the group about my specific questions.

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