Amyotrophic Lateral Sclerosis (ALS)

Amyotrophic lateral sclerosis (ALS) causes a slow degeneration of nerve cells that control muscle movements. As a result, people with ALS gradually lose the ability to control their muscles. Fortunately, their capacity to think and remember things usually is not affected. ALS is also known as Lou Gehrig's disease, after the famous U.S. baseball player who developed the disease.  
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