The eccen should go fovea=red, parafoveal=blue, and periphery = green.
If they aren't going in that order, reverse the overlay.
the polar angle should be, blue for horizontal meridian, green for
lower visual field and red for upper visual field.
Making the fs map will also fail if you don't have a occipital patch
made. Thought that might be your trouble.....
Stephanie McMains
On Nov 24, 2005, at 12:09 PM, Jane Aspell wrote:
hi again
I have been proceeding with the retinotopy analysis using FsFast,
following the
instructions at:
https://surfer.nmr.mgh.harvard.edu/fswiki/
FsFastIndividualRetinotopyAnalysis
and i believe i have successfully overlaid the results on my surfaces
and now
have two questions:
i wasn't able to create the fieldsign with 'paint-sess' because it
couldn't find
tksurfer.new. when i run 'surf-sess' i use the flag -old which forces
it to use
tksurfer.old but this doesn't work in the former case. how can i make
'paint-sess' use tksurfer.old and thus create the fieldsign?
there are no instructions on how to relate the colours seen when
viewing eccen
and polar to the location of the ring and wedge. is there a map
somewhere that
can be loaded that tells me what order the colours run from fovea to
periphery
and from vertical to horizontal meridian etc.?
thanks again for your help!
jane
--
Dr Jane Aspell
Department of Experimental Psychology, University of Oxford,
South Parks Road, Oxford, OX1 3UD
In message <[EMAIL PROTECTED]> Doug Greve
<[EMAIL PROTECTED]> writes:
that's a bug in the wiki, "-s avdk" should not appear there. Rather,
it
should be "-s yoursession" or "-sf sessidfile". If it cannot find the
sessions, then something is not set up correctly. Can you double check
that the sessions in the sessidfile are in the current directory?
Jane Aspell wrote:
Hi
Thanks for all your previous help with freesurfer.
I am trying to use FsFast to do retinotopy analysis and have been
following the
instructions at:
https://surfer.nmr.mgh.harvard.edu/fswiki/
FsFastIndividualRetinotopyAnalysis
I come undone at the stage of running the actual analysis, where the
command
should be:
sfa-sess -s avdk -a rtopy
what does 'avdk' refer to? when i run it i get: ERROR: could not
find session
avdk
when i try it with the arguments:
sfa-sess -analysis rtopy -sf sessid
which is similar to the arguments needed for 'selxavg-sess' i get a
similar
error of not been able to find my (particular subject's) session. i
believe i
have set up the all the directory structures etc correctly for the
sessions
format as previous steps worked fine.
any ideas what's going wrong?
thanks
Jane Aspell
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--
Douglas N. Greve, Ph.D.
MGH-NMR Center
[EMAIL PROTECTED]
Phone Number: 617-724-2358
Fax: 617-726-7422
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