Hello,
I have some basic questions regarding some Freesurfer reconstructions
that I've made on a set of infant brains (12-15month olds). Overall,
the reconstructions have been successful. The exception being that
the gray matter of the anterior temporal lobes are being
underestimated, typically bilaterally. For example, when I look at an
inflated surface, the temporal pole(s) appears pointed and has an
almost triangular edge as opposed to a more "rounded" pole. To my
eye, it appears that the the gray matter is being estimated very close
to the border of the white matter in the anterior temporal lobe. I
believe this to be happening since the wm in this age is not well-
defined and it appears darker than most other wm in the cortex. I'm
also finding in a few other areas (mostly motor and some anterior/
frontal cortex) that the white matter is also being overestimated
(extending into gray matter areas). For my analyses, I'm hoping to
estimate most accurately the wm/gm surfaces for source analyses I am
doing with MEG data. The temporal lobes are of particular importance
given the auditory nature of my task. I am new to the Freesurfer
editing process, and was wondering if you have any suggestions about
editing these surfaces. I would also be happy to try and send you
data/screen shots of what I'm describing in terms of the surface
segmentations if that would better assist you with my question.
Thank you for your help,
Katie Travis
Neuroscience Doctoral Student
Center for Research in Language and
Multimodal Imaging Laboratory
9500 Gilman Drive, Mail Code 0562
La Jolla, CA 92093-0562
email: [EMAIL PROTECTED]
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