[Robert DeLong]

The medulla is the purple part.

[armydoc]

Wrong medulla. They’re talking about the adrenal medulla, the center of the adrenal glands that sit on top of the kidneys

[DUMBGRUNT]

The medulla is the purple part.

Thanks!
I never thought to check out the nature of his work.

I think your pic is of the medulla oblongata just below the brain.
In this instance, it is the adrenal medulla
(medulla=similar to the pit in a fruit)

Now to read a bit on the old underlying form.

Thanks for pointing me in that direction.

[Chickensoup]

that is the brain, the article references the adrenal medulla