Hello. I need your help. I calculated the sources of the electroencephalogram data at 15002 vertices. And I exported the source file to MATLAB. Now, due to the Computational complexity, I need to identify the vertices of the areas with significant electrical activity and perform subsequent processing on them. But unfortunately I can not understand which area each vertex belongs to. These areas are selected from the Boardman Atlas. please help me.
I need to identify the vertices of the areas with significant electrical activity and perform subsequent processing on them
To evaluate what is significant, you need to contrast your data between two experimental conditions or between two groups of subjects.
https://neuroimage.usc.edu/brainstorm/Tutorials/Statistics
I can not understand which area each vertex belongs to. These areas are selected from the Boardman Atlas.
Create a scout representing your cortex area of interest, or directly use an existing scout from the Brodmann atlas generated with FreeSurfer.
Use the process "Extract > Scouts time series" to save the signals for your ROI to a separate file.
If you want to do this from a script: get the vertex indices from the cortex surface, they represent indices of rows in the ImageGridAmp matrix.
https://neuroimage.usc.edu/brainstorm/Tutorials/Scouts#On_the_hard_drive
https://neuroimage.usc.edu/brainstorm/Tutorials/SourceEstimation#On_the_hard_drive