Hi Seyed,

As Bruce mentions, currently the best way to get a complete temporal lobe segmentation might be to add each of the invidual temporal lobe labels (using either of the two parcellation systems). With regards to your specific questions, 1) both of the parcellation atlases do a fairly good job of subdividing the temporal lobe into anatomic units -- mine uses a gyral based approach whereas Christophe's uses a more detailed sulcal and gyral approach, 2) within my parcellation atlas, for the superior temporal gyrus, the anterior boundary is the limen insulae and the medial border is the insular cortex -- for more details on how the wm and gm are segmented, please see Fischl et al., 1999, 2002.

Hope that helps,

rahul

Hi Seyed,

I don't think there's any easy adding up of labels that gives you the temporal lobe, but Rahul and/or Christophe can correct me if I'm wrong. The easiest thing to do would be just draw the boundaries on fsaverage and map it to your subjects using mri_label2label. We should probably provide this at some point. Maybe Christophe or Rahul would be interested in doing in in a free moment.....

cheers, Bruce

On Mon, 8 Jun 2009, Seyed Shahab Sharifi wrote:

...

Subject: Temporal lobe segmentation Date: Tue, 2 Jun 2009 17:40:21 +0100

Hi all,

I am interested in automated segmentation of temporal lobe using freesurfer. I understand that it is possible to add up the individual regions of a specific lobe, create one massive label for that lobe, and get statistics on those. But I am not sure about the practicality of this approach for two reasons; first if all the regions of a temporal lobe can be labeled by Free Surfer, second because I am thinking that the most medial border of the superior temporal lobe could be my arbitrary cut off point of segmenting the temporal lobe, what anatomical/imaging feature has been defined for Free Surfer that distinguishes the white matter of the superior temporal lobe from the stem of temporal lobe (or say putamen) . I would appreciate it if one can guide me through this process if possible.

cheers

Shahab

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