Amyotrophic lateral sclerosis (ALS) - Symptoms and causes Overview Amyotrophic lateral sclerosis (a-my-o-TROE-fik LAT-ur-ul skluh-ROE-sis), known as ALS, is a nervous system disease that affects nerve cells in the brain and spinal cord ALS causes loss of muscle control The disease gets worse over time
Amyotrophic Lateral Sclerosis (ALS) | National Institute of . . . Amyotrophic lateral sclerosis (ALS), formerly known as Lou Gehrig’s Disease, is a neurological disease that affects motor neurons—those nerve cells in the brain and spinal cord that control voluntary muscle movement