That bugs me a lot too, when I forget in mid sentence what I was talking about or the point of it. And it happens too often. I laugh it off but it frustrates me to no end. I was never a good public speaker but in high school my English teacher told me I could put more impact in fewer words than any student she'd ever had. Those days are long gone.
MS itself, or simply the fact that I have MS, does not make me feel isolated. It is the intentional acts of others that do. Particularly when they claim it their intent to end isolation.