it is, and they can take pictures of the inflamed dendrites and axons showing where they're clogged, so I was wondering how much smaller these substructures in the brain stem are than dendrites and axons that neurons travel through, which are pretty freaking small and we've had pictures of for at least a couple decades now.

oh or maybe those were microscope slides and they're saying now we can microscopically look at this stuff without having to cut into it.