Amyotrophic lateral sclerosis, or ALS, is a disease of the nerve cells in the brain and spinal cord that control voluntary muscle movement. ALS is also known as Lou Gehrig's disease.
- ALS Association
- Amyotrophic Lateral Sclerosis (ALS) Fact Sheet from the NIH National Institute of Neurological Disorders and Stroke (NINDS)
- Mayo Clinic Amyotrophic Lateral Sclerosis