Amyotrophic lateral sclerosis

Amyotropic lateral sclerosis (ALS) or Lou Gerig's Disease is a rare and fatal degenerative neurological disease that affects a person's motor neurons, and is characterized by "increasing and spreading muscle weakness". https://www.merriam-webster.com/dictionary/amyotrophic%20lateral%20sclerosis#medicalDictionary ALS is also known as Motor Neuron Disease or MND.