fun(?) fact: they are refer to the black death which is carried by fleas on mice, leading to people having cat not being affected. People then associates them as witches
I'll put this here to save you from a google search:
Amyotrophic lateral sclerosis, also known as motor neurone disease or Lou Gehrig's disease in the United States, is a rare, terminal neurodegenerative disorder that results in the progressive loss of both upper and lower motor neurons that...