# vertices in STC and source files

**URL:** <https://mne.discourse.group/t/vertices-in-stc-and-source-files/235>\
**Category:** Mailing List Archive (read-only)\
**Tags:** list-archive\
**Created:** [July 1, 2010, 5:03pm UTC](https://mne.discourse.group/t/vertices-in-stc-and-source-files/235 "2010-07-01T17:03:00Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\
**Post date:** [July 1, 2010, 5:03pm UTC](https://mne.discourse.group/t/vertices-in-stc-and-source-files/235/1 "2010-07-01T17:03:00Z")

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Hello,

There are generally over 100,000 vertices in the source fif file and there  
are always 10242 vertices in a stc file. Why is there always a fixed  
amount in the stc and if I was interested in translating the stc vertex to  
the original source so that I could create a label file, how would I do  
that?

Thank you,  
-Ricky

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**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\
**Post date:** [July 1, 2010, 5:15pm UTC](https://mne.discourse.group/t/vertices-in-stc-and-source-files/235/2 "2010-07-01T17:15:15Z")

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Ricky,

There is a fixed amount because you always use the same settings when you  
run mne\_setup\_source\_space. There are many options in there to generate a  
source space with in principle as many vertices you want up to the number of  
vertices for a participant (the manual explains in much more detail).

This information exists in the forward matrix in the .nearest field of the  
forward matrix structure (when using the matlab toolbox). Though usually,  
labels are best generated in mne\_analyze (the manual explains this in  
detail) or through freesurfer.

Good Luck!  
D