What Is Spinal Muscular Atrophy?

SMA Types 1, 2, 3 and 4 (5q SMA)

This guide gives a brief overview of 5q SMA - the most common form of SMA - and answers questions about this broad name, its causes, and how many people are affected: www.smauk.org.uk/what-is-spinal-muscular-atrophy

Rarer Types of SMA

This sections brings together the information that’s available about some other rarer forms of SMA. For some of these, the information is very limited:

Page last updated: July 2019