Dear Doctor,
Thanks for the fast reply. Maybe, I did not express it clearly, but when I am saying the paralysis "goes away", it does not mean I get even nearly normal strength. I have a fixed weakness in the upper arms, from 2/5 to 0/5, according to three different Drs I have seen. I am unable to lift them either forward or from the sides, but the muscles that move shoulder blades allow me to reach things, although in a somewhat unusual way.