Identifying key features of ALS type 4

Specialists have documented the key clinical features of amyotrophic lateral sclerosis (ALS) type 4. 

ALS4 is a rare, slowly progressive degenerative disease of the nervous system, which typically has onset in late childhood or adolescence. It is caused by a mutation in the senataxin gene (SETX), and symptoms include muscle atrophy, weakness, and hyperreflexia.