Hi Martin,
Does that mean that one would expect to see reduced lgi (local gyrification
index) where this occurs?
Thank you!
LMR
yours,
Lars M. Rimol, PhD
Norwegian University of Science and Technology (NTNU)
Trondheim,
Norway
On Wed, Oct 29, 2014 at 3:39 PM, Martin Reuter
wrote:
> Hi Lars
Hi Lars,
two thoughts that came up reading this thread:
- each vertex has usually more than 3 triangles (your first mail), the
number differs depending on where you are. With a uniform mesh you'd
have nearly 60 degree angles so you'd have approx 6 triangles at a vertex.
- wm volume can increase
Hi Lars
yes, it seems plausible, particularly since it is so universal.
cheers
Bruce
On Wed, 29
Oct 2014, Lars M. Rimol wrote:
Hi Bruce (and Jorge),
Yes, it's the wm surface. I have also done the analyses with the pial
surface and the results are similar to wm surface.
To your second que
Hi Bruce (and Jorge),
Yes, it's the wm surface. I have also done the analyses with the pial
surface and the results are similar to wm surface.
To your second question: White matter volume increased over this time
period (lme analysis; controls: logP = 8.49, patients: logP = 6.34).
Since the co
Hi Doug,
For some reason, I no longer get an e-mail when you respond to my questions
on the mailinglist, so until today I only saw the first response to this
question (from Bruce).
Anyway, I get your point about smoothing and clusters but I guess showing a
continuous cortical map with vertex valu
This is tough to interpret, but basically, yes it would be
0-.004mm2/year. It is not quite right to say that it is at that vertex
because of smoothing, but in that area. It is also hard to say what the
total change would be for a cluster. One could sum the changes over the
cluster vertices, bu
Hi Lars
which surface are you using? If it's the white surface you might try
looking at white matter volume to see if it is decreasing
cheers
Bruce
On Sat, 6 Sep 2014, Lars M. Rimol wrote:
Hi,
I have performed a longitudinal analysis using the lme module in FreeSurfer,
with this model:
Hi,
I have performed a longitudinal analysis using the lme module in
FreeSurfer, with this model:
*intercept(random effect) + centered age + group + group x centered age +
sex*
I tested the effect of time with this contrast vector [ 0 1 0 0 0 ]. Dependent
variable is area.
Here, mapping the se
