Analysis With Brainstorm
Brainstorm Wiki on which you will find a lot of inormation about how to use Brainstorm.
Import your MRI in Brainstorm
In matlab, type >> brainstorm
The Brainstorm (bst) gui interface should open up.
Follow these steps: First steps
1. Create your protocol if you don't have one yet, for instance: /neurospin/meg/meg_tmp/mystudy/mystudy_bst
2. Create a new subject (right click on your protocol name on the left part of the window)
Select "No, use individual anatomy" if you don't have the subject's MRI, your default brain can be "Colin27_low-nasion_brainvisa" "No, use one channel file per condition (MEG)" Clik on OK Go to the MRI sheet (the left one)
Import your MRI (right click on your subject name)
Choose your MRI file
Double click on the MRI object to open the MRI viewer
If your MRI slices are not well oriented, use the button "zyx Permute MRI dimensions cyclically" Import the surfaces (right click on your subject name)
Import simultaneously the three files
- nomsujet_head.mesh
- nomsujet_Lhemi.mesh
- nomsujet_Rhemi.mesh
Reduce the number of vertices for your head surface by using the menu "Less Vertices" (right click). Choose 8000. A new object nomsujet_head_8000V is created.
Merge both hemispheres models to obtain the cortex.
for this, select simultaneously both hemisphere surfaces right click on both selected files and choose "merge surfaces" rename the new surface created by "cortex" Reduce the number of vertices for your cortexsurface by using the menu "Less Vertices" (right click). Choose 15000. A new object cortex_15000V is created.
Delete files Lhemi, Rhemi and cortex and only keep Head_8000V and cortex_15000V.
Test the surface alignment of your surfaces with the MRI. For this, use the menu "Align/Check Alignment with MRI" (right click on the cortex_15000V object)
if necessary, use the tool Align/Align manually (right click).
And then...
Go into Functional data (2nd sheet) and import data of interest
Compute head model (overlapping spheres) � run
Compute sources, magnetometers and gradiometers separately (at least at first) and select the option "Kernel only"