You'll have to use fsaverage_sym since you are swapping sides. To do a
"normal" group analysis, you'll have to first run mris_preproc on all
the subjects who have the unaffected on the left, then again for those
on the right. This will give you two files. run
mri_concat lh.fsaverage_sym.mgz
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I have a group of stroke patients. Most of them have a left-sided stroke,
the others right-sided. I would like to swap the affected right hemisphere
with the unaffected left hemisphere in the patients with a right-sided
stroke. I have done that
what do you mean "flip" them?
On 11/5/2019 6:10 AM, Jose Graterol wrote:
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I believe I found my problem. I was trying to run the analysis with xhemi.
Therefore it asked for 34 inputs (17subjects * 2 hemispheres). I was doing it
that way because I flipped the
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I believe I found my problem. I was trying to run the analysis with xhemi.
Therefore it asked for 34 inputs (17subjects * 2 hemispheres). I was doing
it that way because I flipped the hemispheres of the right affected stroke
subjects. That was done
There are not any restrictions, just do the same as you would for a
non-paired analysis. In any event, you are creating a linear model
y = a +b1*x1 + b2*x2 ...
where y is the input (paired diff) and x1, x2, etc, are your factors.
You are the one who knows your data and what models would be
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My doubt is, if it is possible to use a FSGD file to add variables to a
--paired-diff analysis. If it is, what would be the right way to format the
FSGD file.
Thanks in advance.
On Wed, Oct 30, 2019 at 3:01 PM Greve, Douglas N.,Ph.D. <
I don't understand. What per hemisphere variable?
On 10/25/2019 3:15 AM, Jose Graterol wrote:
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Thanks for your answer. A follow up question:
How should I then specify the variable's values per hemisphere
while making the FSGD file if I want to add covariates
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Thanks for your answer. A follow up question:
How should I then specify the variable's values per hemisphere
while making the FSGD file if I want to add covariates when
running mri_glmfit?
Thanks in advance.
On Fri, Oct 25, 2019 at 12:18 AM Greve,
If you are trying to determine whether the hemispheres are different,
then you need to do the subtraction between the hemis (ie, the
--paired-diff). If you want to look at the hemispheres separately, then
don't combine them in a single file
On 10/21/19 4:58 AM, Jose Graterol wrote:
>
>
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Thanks for your answer.
I want to correlate TMS values in 17 stroke patients. Following the
instructions provided to Anders in this link
What are you trying to test? Usually you don't have lh and rh in the same glm
On 10/17/19 7:09 AM, Jose Graterol wrote:
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Dear Freesurfer Community,
I have a question regarding the formatting of the FSGD file while doing an
analysis with Xhemi.
First the --y
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Dear Freesurfer Community,
I have a question regarding the formatting of the FSGD file while doing an
analysis with Xhemi.
First the --y file was created as previously explained in another
discussion (
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