Put it this way, of the thousands of users on this site and AboutBFS who had twitching, two have actually had suspect ***. One was 37. The other 27. The first had all kinds of issues (slurring, obvious clinical tongue weakness) and a poorly conducted 'clean' EMG. The other had slurring and, oddly, and it makes me think she has MNM, not ***, leg atrophy + clinical weakness presenting as an inability to hop on one foot.
*3, forgot the one. She had UMN signs though (hyperreflexia).
Essentially, had any one of these people had a thorough clinical by a neurologist, it would've been apparent in the very beginning something was amiss. And truly, if you want the ultimate peace-of-mind, talk to a neuro and request an exam.