As to FTD (fronto-temporal dementia) and ALS, Megs asked:
From experience do you know how many people develop the Frontal Lobe Dementia in conjunction with ALS ? ...........My Dads neurologist said the 2 were connected , but hadn't seen many cases .....talk about a double whammy
I can't speak "from experience" only from online reading, but I believe that about 25% of ALS patients have FTD also. (Don't rely on my faulty memory ... there are lots of legit places online to get the exact figures.) I have also read that where there is overlap, often the FTD starts first.
FTD is not like Alzheimers. Symptoms can be language difficulties (word recall, not recognizing written words, etc.) or behavioral (lack of "social appropriateness"). Depends on which side of the brain it's on. Like early ALS symptoms, early FTD symptoms can be very subtle too. Who doesn't forget names or words as they get older?
As you all compare second-hand reports of twitching/atrophy/weakness, please pay attention to whether the responses are from patients who have been diagnosed with ALS. There is a ton of misinformation on this forum, as well as elsewhere, from people
WITHOUT ALS posting their symptoms and confusing other undiagnosed people.
The weakness in ALS is so insidious, you can lose a lot of strength without being aware of it, as adjacent muscle neurons (fibers? ... sorry don't know a thing about medicine, only a little about ALS

) carry the load as long as possible.