Posted in Web What is ALS – The ALS Association July 4, 2019 Amyotrophic lateral sclerosis (ALS), often referred to as . What is ALS? ALS, or amyotrophic lateral sclerosis, is a progressive neurodegenerative disease that affects nerve cells in the brain and the spinal cord. : http://www.alsa.org/about-als/what-is-als.html