Hi An Lijun

The choroid is a plexus of ependymal cells that produce CSF. it is pretty tough to segment and mostly we include it to get more accurate segmenations of the hippocampus where it is adjacent to ventricle and the ventricles themselves. I'm not sure I've ever seen any normative stats on it though.

You can read more here:

https://en.wikipedia.org/wiki/Choroid_plexus

cheers Bruce

On Tue, 7 Apr 2020, Lijun An wrote:

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Dear Freesurfer experts,

I have a little question about the structure 'chorid-plexus', I am not very deep in brain anatomy and function. Could anyone have a sense of what is the normal range of this structure volume from Freesurfer reconall?

I found that mean of 'chorid-plexus' in ADNI is around 1500 mm^3, when I ran reconall for my local subejcts (a local dataset), I found the mean of 'chorid-plexus' is around 800 mm^3.

Could anyone give an explanation or a paper I could refer to for this 'chorid-plexus' structure?

Thanks  so much!

Best Regards,An Lijun