Can we source localize ICA components in brainstorm?

1

Hi Team.

Epileptic spike localization is often difficult at sensor space. Another way is to localize the ICA components individually to attain better accuracy.

I have been searching a tutorial to perform this in brainstorm, does theses steps exist?

Can we run ICA on brainstorm?
Can we source localize the interested ICA components?

If so, I would to get some guidance on this.

Hari

2

Can we run ICA on brainstorm?

I recommend you read this tutorial:
https://neuroimage.usc.edu/brainstorm/Tutorials/Epilepsy

Can we source localize the interested ICA components?

Remove all the components that you don't want (it is OK to keep only a handful), then estimate the sources for these selected ICs.
If you compute a noise covariance matrix from the recordings, the same IC decomposition and selection must be applied to the recordings.

3

Hi Hari,

I think we may be using similar methods for data processing. I am keen on using ICA on brainstorm & to do source localisation after cleaning.

I also recommend the EEG and epilepsy tutorial, very helpful! It may also help to consider the type of data you are working on, i.e. meg or scalp eeg.
I also recommend the following link for practise in detecting ICA components:

Healthy Regards,
Vyte

1 Like
4

Thank you for the link, I added it to the EEG/Epilepsy tutorial.

2 Likes
5

Thank you Francois and Vyte. I could not get it enabled the ICA in , Record=>Artifacts=> ICA components, as shown in the screen shots.

ICA
ICA1887×991 146 KB

6

The SSP and ICA features are only available on continuous files (Review instead of Import):
Tutorials/ChannelFile - Brainstorm

If you are not familiar with these concepts, I recommend you start by following all the introduction tutorials (section "Get started") using the example dataset provided, before trying to process your own recordings.
https://neuroimage.usc.edu/brainstorm/Tutorials