Hi,
I'm not sure where you are getting the descriptions below. This
statistical map on the surface is actually looking at the correlations of
thickness and age, not gender. Can you be more specific as to what you
are refering to with the following descriptions:
the 'color scale bar' indicates
area coded in blue == cortical thickness of Female < that of Male
(eg. 1mm <2mm),
area coded in red == cortical thickness of Female < that of Male
(eg. 3mm of Female >2mm of Male).
Jenni
On Wed, 9 May 2007, Ruiwang Huang wrote:
Hi Jenni
Thanks a lot for your reply.
Following the descriptions on
FsTutorial/Visualization
(https://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/Visualization)
the 'color scale bar' indicates
area coded in blue == cortical thickness of Female < that of Male
(eg. 1mm <2mm),
area coded in red == cortical thickness of Female < that of Male
(eg. 3mm of Female >2mm of Male).
Could you please tell me whether my understanding is correct or not?
Best wishes
Rhuang
On Wednesday 09 May 2007 13:38, Jenni Pacheco wrote:
Hi Rhuang,
On that particular page the color bar is showing the sigificance
(-log10(p)) for the group difference in that example. However, if you were
displaying a cortical thickness map for an individual subject the color bar
would then be showing the cortical thickness values (in mm).
It is showing the negative values to indicate the direction of the effect.
Because of the way this analysis was set up the blue regions show areas
where older subjects are significantly thinner than younger subjects and
the red regions show areas where younger subjects are significantly thinner
than older subjects.
Jenni
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Ruiwang Huang
Sent: Wednesday, May 09, 2007 4:20 AM
To: freesurfer@nmr.mgh.harvard.edu
Subject: [Freesurfer] Does 'color scale bar' show the cortical thickness
or[-log10(p)]?
Dear All,
I am puzzled by the meaning of 'color scale bar', which appears in the
first
figure of the FsTutorial/Visualization
(https://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/Visualization)
Could you please let me know the meaning of colorbar?
Does the 'color scale bar' show the cortical thickness or [-log10(p)]?
Why the colorbar indicates the positive and negative value in the first
figure?
Many thanks in advance
Rhuang
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