Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease, which means it is a chronic condition that gets worse over time as damage builds up in parts of the nervous system. It affects a specific type of neurons –the motor neurons in the brain and spinal cord–and leads to a gradual loss of muscle function that eventually results in paralysis and death1. ALS is not very common, affecting 4.42 in every 100,000 people2. It is more frequent in men than in women1,3, and the average survival is 2 to 5 years3.
Diseases
Amyotrophic Lateral Sclerosis
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Last updated: July 2026