Hi, FSL users
I drew a seed mask on the cerebral peduncle and a cortical mask on the
precentral gyrus to see how the precentral pyramidal tracts go from
brainstem to primary motor area. I want to show only the tracts that reach
my cortical masks. Now I am using the cortical mask as the waypoint mask as
well as target mask to show only those tracts that reach the cortical mask.
My questions are:
1) Is this the correct way to do?
2) Is there any difference in interpreting the result as compared to the
case when I use cortical mask as the seed mask and cerebral peduncle mask as
the cortical mask?
Thank you in advance
Longchuan
----- Original Message -----
From: "Christina Hugenschmidt" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, June 18, 2008 6:51 AM
Subject: [FSL] TICA on resting state
> Hi all (and Christian in particular),
>
> I am interested in running a TICA analysis comparing resting state and
> also video watching between two groups. From reading the posts and
> information on the FSL website, I think I should be using the same
> methodology described in the Damoiseaux 2007 Cerebral Cortex paper, where
> the data is fourier transformed prior to running the TICA analysis. I was
> wondering if you could tell me the process used to transform the data
> prior to running the TICA?
>
> I would also like to be sure that I understand exactly what is being
> compared between groups in this analysis. When the data is transformed,
> does this mean there is power spectrum information in each voxel? Are
> networks then identified by shared power spectra? And when group
> differences are evaluated in contrasts, a significant difference means
> that the spatial maps identified within the power spectrum for that
> component are different between groups?
>
> Thanks for any insights you can offer,
>
> Christina
>
>
>
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