Hello Sarah

Your easiest bet is to generate .w files. Freesurfer's home directory has a matlab directory, which can read and write .w files. These in turn can be displayed on brain surfaces within the tksurfer environment as an overlay.

The down-side is if you want to do time-varying things, you will need to pick either a time point or collapse a series of time points using averaging, maximum value or some other tricks.

Good luck Daniel

Sarah Rugheimer wrote:

Hello, I am trying to display MEG source location data on the surface. Does anybody have detailed information on this? I am looking at page 125 of the FreeSurfer manual and it describes converting from ASCII format to Curvature files, but I have a few questions. Right now, I have the MEG source waveforms and a program to compute the contours of activation through an inverse technique. Is there a specific format of the output for the MEG data? And when I make the ASCII file, what is the starting latency and the vertex index. I have the value and (x,y) coordinates for that value. Is the vertex index related to the coordinates? Thanks, any help is appreciated.

Sarah Rugheimer _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer