The original and full name of this illness is Myasthenia Gravis Pseudoparalytica.

Or in plain English-severe fatigable muscle weakness which looks like paralysis (probably meaning stroke) but is not, because there are no anatomical findings (such as one would expect to find in the brains of people who die of stroke).

Friedrich Jolly coined this term and he was also the first to document objective evidence for a physiological abnormality. He showed that on repeat nerve stimulation the muscle contraction rapidly diminishes.

Patients with myasthenia are also tired, because it is very tiring to constantly think what you can or can't do, when trying to perform simple daily activities that don't normally require actively thinking about them.

And it is also very tiring to have to think of how to explain this to other people and justify your peculiar behavior.