Quiz: Do You Know These Key Facts About SMA? Question Title 1. Spinal muscular atrophy is an inherited neuromuscular disease characterized by degeneration of the motor nerves in the spinal cord’s posterior horn. True False Question Title 2. SMA is the leading genetic cause of infant deaths. True False Question Title 3. Across all SMA types, the condition has an incidence rate of between 1 in every 10,000 live births. True False Question Title 4. A child can develop SMA if they inherit mutant copies of the SMN1 gene from just one of their parents. True False Question Title 5. If a carrier of SMA has a biological child with a noncarrier, there is zero chance the child will have SMA. True False Next