you haven't presented any evidence...
Oh, I'm sorry. I didn't know I had to spoon-feed you the definition of polio.
My mistake for assuming that you'd know that polio = a disease of the central nervous system and that the brain is part of the central nervous system before...y'know...trying to argue about it.
Polio brain
Fatigue is the most commonly reported, most debilitating and least studied Post-Polio Sequelae (PPS) affecting millions of polio survivors throughout the world. In two national surveys of American polio survivors, 91% reported new or increased fatigue, 41% reported fatigue significantly interfering with performing or completing work and 25% reported fatigue interfering with self-care activities.(1) Fatigue was reported to be triggered or exacerbated by physical overexertion in 92% and by emotional stress in 61%.
Importantly, polio survivors differentiate between the physical tiredness and decreased endurance they associate with new muscles weakness, and a "brain fatigue" that is characterized by problems with attention and cognition. Between 70% and 96% of American polio survivors reported that fatigue was accompanied by problems with concentration, memory, attention, word-finding, maintaining wakefulness and thinking clearly, with 77% percent reporting at least moderate to severe difficulty with these problems. (2)