Claim: Amyotrophic lateral sclerosis usually starts around the age of 50.
Evidence: The disease usually starts around the age of 60 and in inherited cases around the age of 50.
Amyotrophic lateral sclerosis -LRB- ALS -RRB- , also known as Lou Gehrig 's disease and motor neurone disease -LRB- MND -RRB- , is a specific disease that causes the death of neurons which control voluntary muscles.