I’m due to see this neurologist again.....usual nhs follow-up.
Gimme some good comebacks to challenge this load of cobblers !
Bear in mind that 'functional neurological disorder' is coded under the 'conversion disorder' diagnosis (i.e., psychosomatic/hysterical). It's a recently made-up diagnostic category.
If we're supposed to reflect that psychosocial issues affect lots of/most illnesses, then why isn't MS treated primarily with CBT? Or cancer? Or Parkinson's?
This doctor clearly has his own biases. You don't have to accept his opinion. You could ask to be referred to an ME specialist, who will at least give you an actual diagnosis, even if they then want to treat you with CBT and GET (which you can refuse).
Vague references to 'signals' and the like are untestable, and therefore unscientific. This is the bread and butter of FND.
A few clues that suggest ME (none is diagnostic on its own, except perhaps the first):
1. Symptoms that get worse after exertion. Especially if this feels quite flu-like, and kicks in after a delay of a few hours to up to three days. Keep an activity diary and use a step counting app or Fitbit. If you feel worse 1-3 days after activity, that indicates PEM.
2. ESR < 5mm/hr. Anecdotally, this may support a diagnosis of ME. Some patients have raised levels, though, so it's not diagnostic.
3. Alcohol intolerance - very common in ME, apparently. There isn't any research on this, but it's likely related to mitochondrial dysfunction and/or neurocognitive problems.
4. A positive Romberg test. Indicates neurological problems.
5. Sticky or very thick blood (in scientific terms, it's lost its deformability). Doctors often notice this in patients, though if you've ever done a finger-prick blood test, you may have noticed it yourself! Possibly diagnostic, but more info needed.
6. Possibly increased prolactin levels after the buspirone challenge, or at least a nauseous feeling. ME patients usually don't do well on normal doses of SSRIs and similar drugs. This may not work if you have co-morbid depression.
The two-day CPET isn't really done here, and you're unlikely to get scans done (although hypoperfusion, especially of the brainstem, may be a clue). You could probably find some neuropsychiatric testing online to measure brain fog rather loosely (you'd expect slowed processing), although it's not flawless.