I've just googled " muscle twitching multiple sclerosis" and found heaps of sites that I found interesting. The "ticking' that I get sounds really similar to what you've described. The sites on a whole say it's pretty common in MS patients, and names specific types. Fasciculations, myokymia...... something about
it being the spontaneous release of an axon, causing the contraction.......
I've just seen my neuro and mentioned the muscle twitches, he proceeded to tell me that they are not a symptom of MS????????? (Which is what prompted my googling).
Getting another MRI today, so will keep you posted.
Neuro says he'd "bet on me having MS"
IF YOU CAN'T SEE THE LIGHT AT THE END OF THE TUNNEL...
GO DOWN AND LIGHT THE BLOODY THING!!!