Dear Freesurfer experts,<br><br>I have a question regarding mris_divide_parcellation. I have created a file containing the parcels from aparc.annot that I want to split and I have run the following command. Why is Freesurfer allocating 36 additional units? When I open the new annotation file (rh.aparc.splitted) with matlab (using read_annotation), I can see that at the end of colortable.struct_names there are a lot of parcels called &quot;cluster38, cluster39, ..., cluster71&quot;. What are exactly these clusters? <br>


<br>Many thanks,<br>Yolanda<br><br><br><b>In <i>splittable.txt</i></b> file<br>precentral          2<br><br><b>Command</b><br><br>./mris_divide_parcellation fsaverage rh aparc.annot splittable.txt rh.aparc.splitted<br><br>


<b>Output</b><br><br>reading colortable from annotation file...<br>colortable with 36 entries read (originally /autofs/space/amaebi_026/users/buckner_cortical_atlas/scripts/colortable_final.txt)<br>interpreting 4th command line arg as split file name<br>


dividing precentral into 2 parts<br>allocating new colortable with 36 additional units...<br>saving annotation to rh.aparc.splitted<br>writing colortable into annotation file...<br><br clear="all"><br><br>