Hi Sarah
the unfolding tries very hard to preserve exactly this - the metric
properties. If you cut off the occipital third of cortex and flatten it
(after introducing some cut along the axis of the "cone") you should be
able to get to around 10% distortion or below, which I assume is good
enough.
cheers
Bruce
On Mon, 11 May 2015, Sarah Finnegan wrote:
Dear all,
I am looking to take two measures within the visual cortex.
1) A measure of width and length for each activation cluster overlaid onto
the flattened cortical surface.
2) A measure of spacing between each cluster
I can find how to take measures of area but I specifically want to know the
width and length separately to correlate this to potential stripe systems.
My plan was to fit an oval to each of these clusters and measure length
through the cardinal axis and width through the minor, spacing would be
calculated from a line fit to the minor axis of each cluster. Unfortunately
I think the unfolding process will have changed the spacing relationships
between clusters to make this inappropriate.
I wonder if there is a command or established pipeline to take such
measures?
Thanks for your help!
Sarah
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