Hi
@femtosecond99!
The emphasis here, IMO, is on
consistently. Meaning that other specialists might not be able to identify the more "hidden" cases.
Upright mri's are not only pictures that are taken while the patients are sitting (instead of lying). They are also taken while the patients are moving their heads/necks into different positions.
So that means there are a lot of pictures taken, all have to be looked at very carefully, measuring a lot of different angles, etc. As I said above, even fractures tend to be overlooked quite commonly [in still pictures!].
So I really appreciate Jeff's recommendations of the
most reliable specialists to
diagnose/outrule Chiari and CCI.
I don't know if Jeff mentioned it anywhere. I do not know if this is even the case in most people with Chiari and/or CCI. It is something
that I would expect, as I said above.
Imagine you'd have a prolapsed lumbar disc. It would hurt* pretty much all the time, but would inhibit you from standing upright, while would be better lying on your back with your legs elevated on a stool etc. Now imagine you'd have to cough or sneeze...

[* there might be other symptoms as well, just focusing on pain here]
So
I'd say symptoms would be dependent on what structure/s (brain? nerve roots? spinal cord?) being compressed at what length of time (permanently? intermittendly?). And also bearing in mind that compression would additionally lead to inflammation of these structures, leading to further and/or increasing current symptoms.
P.S. English is not my first language, so I'd like to apologize for any unprecise/wrong/funny wording.
And Hi
@Wayne
Thanks for the link, interesting indeed!
Yesterday, I ordered a soft cervical collar, just to find out if certain symptoms might be related to my neck. I've had 4 whiplash injuries in the past and my neck is kind of my 'weak spot'.