External Email - Use Caution

Hello Jessica,

1)

In the LME tutorial, the 'lhcortex' variable contains information about which vertices will be used for the analysis. I.e., it's a cortical mask. The information is read from the 'lh.cortex.label' file within the fsaverage directory.

The way to go would probably be to create a Freesurfer label file for your region of interest, akin to the 'lh.cortex.label' file, read it into a Matlab variable, and use this variable instead of the 'lhcortex' variable during your analyses.

2)

Can't tell at the moment, but may have time to take a closer look next week.

Best,

Kersten

On Sa, 2019-06-15 at 02:57 +0000, Hua, Jessica wrote:

External Email - Use Caution

Hi FreeSurfer Experts,

I had two questions regarding the longitudinal process.

1) I am using the linear mixed effects mass-univariate approach to analyze my longitudinal data. A priori I am interested in the orbitofrontal cortex and the parahippocampal gyrus. Is there a way in FreeSurfer to mask my longitudinal analyses to these regions specifically?

2) Also is there a way to modify the FDR2? My analyses do not meet the FDR2 (q < .05) p threshold of 4.29, and I wanted to see what threshold it is meeting. Specifically, I wanted to see if it was meeting q < .1. In the lme_mass_FDR2.m, I tried to change the rate to .1, but i kept getting the same result as when it was .05.

Thank you in advance for your help!

Best,

Jessica Hua
_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer