yep, understanding the axon thing. One axon being miniscule I imagine...

now what i don't get is ..

how many/ how wide/ how thick is the 'bunch'/bundle of axons that are damaged for it to show up as such a large area on an mri ?

i can't see that so many axons (all running in the same direction ? in a bundle ?) could be in the same place for the damage to show up so large.

hence, the question, is anything ELSE damaged in the area surrounding the axons ? or is it truly just a bundle of axons that end up being quite large/wide/big ?