Defining the line of seeds

[Qiwei-Zhao]

Your good work got me thinking. Thank you so much for sharing the data analysis code!

One thing I am considering about is whether the seeds line is selected manually or algorithmically in the seed-voxels fc? I'm sorry if I missed this in the code.

[vanandrew]

The seed lines are generated algorithmically (you still need to define the endpoints however).

The code for this part is actually located in this repo: https://gitlab.com/vanandrew/wbsurfer

For some insight on the technical side of things: basically you define a list of vertices you want to trace of the surface. Given this "path", the algorithm will compute the shortest geodesic path between each of these points on the path, then interpolate to the nearest vertex for all these intermediate points. This essentially fills in the points between each pair of vertices you specify.

Hope this answers your question!

[Qiwei-Zhao]

Thank you so much!

So basically, in the individual-level analysis mentioned in the article, I should define the starting and ending vertex of M1(the most ventral aspect of the medial motor area & the ventral lip of the precentral gyrus right above the operculum) based on anatomy manually, and then calculate the path by the algorithm described above. Is my understanding correct?