Tag Archives: Spinal Muscular Atrophy

Spinal muscular atrophy (SMA) is an inherited disease that affects an infant’s muscular activity.  Voluntary muscles are driven by motor neurons.  Children with SMA are missing a gene that is required to produce certain proteins involved in motor neuron development.  Without this protein, the nerves shrink and ultimately atrophy.  Without motor neuron innervation, the muscles […]