Hi,
In probtrackx, the streamlines only stop if they meet the angle criterion or reach the edge of the brain.
Of course, they cannot detect synapses. If you want your streamlines to stop at given brain locations (such as deep grey matter), you can use a stopping mask.
Cheers,
Saad.
On 5 Apr 2010, at 17:03, Namik Kirlic wrote:
> We have a question regarding the stopping criteria in probtrack. In the 2003 Behrens et al. paper, it discusses the criteria relating to angle of fibers and multiple directions, but we are not entirely clear what the criteria are for fibers going into a nucleus, which synapse there and then new fibers leave that same nucleus continuing in the same direction they were before (such as happens in some subcortical relays).
>
> Can anyone clarify what the rules are for this in probtrack?
>
> Thank you.
>
>
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--
Saad Jbabdi
University of Oxford, FMRIB Centre
JR Hospital, Headington, OX3 9DU, UK
(+44)1865-222466 (fax 717)
www.fmrib.ox.ac.uk/~saad
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