SPINAL MUSCULAR ATROPHY (SMA)
Spinal Muscular Atrophy (SMA): An Encyclopedia Entry The Core Definition of Spinal Muscular Atrophy (SMA) Spinal Muscular Atrophy, universally known as SMA, is a severe, debilitating hereditary motor neuron disease characterized by the progressive wasting, or atrophy, of the skeletal muscles. This physical deterioration results directly from the degeneration and eventual death of specialized nerve […]