Yes, that is possible, but you should see some sort of trend, eg, most the ROI should have a certain sign
On 08/24/2016 06:47 PM, miracoo...@gmail.com wrote: > Thanks doug. Also, let's say I extract the aparcstat table and perform t > -test using spss and a ROI become significant, is it possible the significant > effect will be lost using GLM surface based? > Best, > Paul > > Sent from my BlackBerry 10 smartphone. > Original Message > From: Douglas N Greve > Sent: Wednesday, August 24, 2016 5:39 PM > To: freesurfer@nmr.mgh.harvard.edu > Reply To: Freesurfer support list > Subject: Re: [Freesurfer] GLM surface based cortical thickness analysis vs > aparcstat table cortical thickness > > One is a map-based/voxel-wise analysis, each voxel is treated > separately. The aparc stats table is an average over all vertices in the > ROI. If you have an effect that does goes across the ROI boundary, it > could be lost in the ROI analysis. On the other hand, the ROI analysis > may be more powerful because of the averaging across space and fewer > issues with registration across subject > > > On 08/23/2016 04:59 PM, miracoo...@gmail.com wrote: >> Hello freesurfer experts, >> What's the difference between GLM surface based cortical thickness >> analysis and the cortical thickness analysis performed when using >> regions extracted from aparcstat table? >> Best, >> Paul >> >> Sent from my BlackBerry 10 smartphone. >> >> >> _______________________________________________ >> Freesurfer mailing list >> Freesurfer@nmr.mgh.harvard.edu >> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer -- Douglas N. Greve, Ph.D. MGH-NMR Center gr...@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
