The data in aparc.stats contain surface area, gray matter volume, and average thickness for whole regions, and are not intended for surface display. If you want to analyze those regional values use 'aparcstats2table' and then import the data into your preferred statistical package for further analysis. If you want a specifically vertex-wise analysis then see the tutorial for using QDEC.
cheers, -Mike H. On Thu, 2010-05-06 at 11:33 -0400, Rajagopalan, Venkateswaran wrote: > > Dear All, > > I am sorry to post this message again. Since i am not able to find > from the tutorial and archives what i need i am posting it. I want to > compare cortical thickness values in each region from aparc.stats file > between control and patients. I am wondering whether it is possible to > compare all the regions given in aparc.stats file and give a map > showing which of these regions are significantly between the two > groups (like VBM the final p map will give you regions which are > significantly different). > > Do i need to create a separate contrast matrix for each and every > regions (for eg one contrast for lh.cuneus,one for lh.temporalpole > etc) or like in VBM studies you give a single contrast matrix and > design matrix since you are testing the same hypothesis in different > regions of the cortex. > > I also would like to know whether i have to do multiple comparisions > when i am testing for same hypothesis in different regions or not > needed. In the tutorials i find mostly regression between thickness > and demographic parameters so any suggestion or guidance to where i > can find tutorial or materials related to my above questions. > > Thanks > > venkat > > =================================== > > > P Please consider the environment before printing this e-mail > > > > Cleveland Clinic is ranked one of the top hospitals > in America by U.S.News & World Report (2009). > Visit us online at http://www.clevelandclinic.org for > a complete listing of our services, staff and > locations. > > > Confidentiality Note: This message is intended for use > only by the individual or entity to which it is addressed > and may contain information that is privileged, > confidential, and exempt from disclosure under applicable > law. If the reader of this message is not the intended > recipient or the employee or agent responsible for > delivering the message to the intended recipient, you are > hereby notified that any dissemination, distribution or > copying of this communication is strictly prohibited. If > you have received this communication in error, please > contact the sender immediately and destroy the material in > its entirety, whether electronic or hard copy. Thank you. > > _______________________________________________ > 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. _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
