How to extract surface file from EEG signal in Brainstorm

Discussions
1

Hello,

I wanna extract the surface file and 3D node position file(.mat) from EEG signal. How do I do it?

Thank you
Irving

2

The surface file is directly accessible on the hard drive as a .mat file:
http://neuroimage.usc.edu/brainstorm/Tutorials/ExploreAnatomy#On_the_hard_drive:_Surface

What do you mean with “3D node position file from EEG signal”?

3

Thanks for you reply. What you said is the surface file is unique no matter which channel EEG data i used. Is that correct? About 3D node position file,it’s also a .mat file and contain a structure variable named " Scouts" . Moreover, it should include several fields(“Vertices”“Seed”“Color” etc)

4

I’m sorry, I’m not sure I understand the kind of information you need.
Can you please refer in a clearer way to the data you want to access? Either by pointing at a section in the online tutorials (http://neuroimage.usc.edu/brainstorm/Tutorials) or by illustrating it with a screen capture.
Please also describe what you are expecting to do with it.
Thanks

5

What i wanna expect is Cortex network. In other word, I was about to get Cortex network via EEGNET. So, I am confused that how to export the Scouts file and Surface file using brainstorm.This is two samples of these files.

Thanks

6

7

I’m sorry again: what is “Cortex network”?
Are you talking about the vertex-vertex connectivity matrix? This corresponds to the VertConn field (see the tutorial page I pointed previously)

8

Sorry about the poor explanation before, I have reviewed the tutorial of Brainstorm. Is it necessary for me to transfer the EEG signal(.cnt file) into the anatomy folder? May I ask how to do it? Thanks for your patience.

9

As explained in the Brainstorm tutorial, you need to import the anatomy of the subject in the anatomy side of the database explorer (or use a MNI template), and link the .cnt recordings in the “functional data” side of the database explorer. You never add functional recordings to anatomy folders, the two types of information are linked by the database.

If you are planning to use Brainstorm for you data analysis, please start by following all the introduction tutorials in the section “Get started”, at least until #19, then read the tutorial “EEG and epilepsy” for additional information about how to process EEG data in Brainstorm:
http://neuroimage.usc.edu/brainstorm/Tutorials