Learn about ALS

What is ALS?

Amyotrophic lateral sclerosis (abbreviated ALS, also referred to as Lou Gehrig's disease) is a form of motor neuron disease. ALS is a progressive, fatal, neurodegenerative disease caused by the degeneration of motor neurons, the nerve cells in the central nervous system that control voluntary muscle movement. The condition is often called Lou Gehrig's disease in North America, after the famous New York Yankees baseball player who was diagnosed with the disease in 1939.