Dear Sierra, there's no direct correspondence between these subfields and head / body. If you want, you could create a geometric rule to subdivide the hippocampus into head / body / tail, e.g., by creating a coordinate system based on the major axis of the hippocampal shape. Kind regards, Eugenio

On Tue, 2014-01-14 at 18:07 +0000, Germeyan, Sierra (NIH/NINDS) [F] wrote:

Hi everyone,

In using Van Leemput's -hippo-subfields flag as part of the recon-all script to obtain hippocampal subfield volumes, my lab has determined that larger subfields are more relevant for our purposes clinically/surgically. Is there a way to group the fimbria/CA1/2,3/4,DG/presubiculum/subiculum/hippocampal fissure/etc. subfields such that they correspond to the head, body, and tail of the hippocampus? I am aware that the subfield "hippocampus" refers to part of the tail of the hippocampus, but beyond that, it is unclear how these subfields should be categorized.

Thanks for the help!

Sierra Germeyan, B.A. Clinical Epilepsy Section, NINDS, NIH

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