AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

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Andrew DeMarco
September 15, 2009 03:29PM
All,

I've used regions of CA_N27_ML as masks to compare lateralized activation in the temporal lobes. However, I have noticed that some regions have significantly different volumes for left vs right. For instance, the volume of left superior temporal gyrus (region 81) is only 72% of the right STG (region code 82). Left SMG (region 63) is only 64% of the volume of R SMG (region 64). Etc...

I couldn't find any mention of these volume asymmetries in the papers referenced in the whereami help file. Am I doing something wrong in creating these volumes?

whereami -prefix L_STG -mask_atlas_region 'CA_N27_ML::81'
whereami -prefix R_STG -mask_atlas_region 'CA_N27_ML::82'
etc...

Have I missed this topic being discussed in one of the references?

I have heard that Colin 27 has an asymmetries in planum temporale but I can't remember where and couldn't find the paper. Is the volume asymmetry an artifact of Colin's neuroanatomy?

How can I accommodate these volume differences while still referring to an anatomical region contained in an atlas?

Thanks,
Andrew
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Subject Author Posted

Atlas Asymmetries

Andrew DeMarco September 15, 2009 03:29PM

Re: Atlas Asymmetries

Daniel Glen September 16, 2009 03:18PM