1. Of whatever surface you specify (white by default I think). 2. Yes. 3. Easy enough to do in matlab I guess.
Bruce
On Mon, 26 Sep 2005, Michele Perry wrote:
Hi, I have some questions (sent to me by someone else, actually) about freesurfer output from make_cortex_table.csh.
- Do integrated_rectified_mean_curvature &
integrated_rectified_Gaussian_curvature refer to the shape/arc of the surface of the cortex either before or after inflation? Or are they descriptors of the distribution of the individual thickness measures... as might indicate if the measures were normally distributed (within an area) or skewed to the left or right?
- Does the num_of_vertices represent the number of measures of thicknesses
made for that region?
- Would be possible to examine the distribution of thickness measures to
identify focal regions of skewing... as might occur if there were micro-foci of atrophy within some areas? For example, values for the thicknesses corresponding to the 10th, 25th, 50th, 75th, and 90th percentile values within an area? Or even a median thickness, in addition to the mean?
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