Type 1 Spinal Muscolar Atrophy (SMA1) is a genetic disorder that affects the spinal motor neuron; the most common form is an autosomic recessive defect of the survival motor neuron gene 1 (SMN1); it generally onsets before 6 months of life presenting with severe hypotonic weakness in the lower limbs, respiratory distress, weak cry, and poor feeding [1]. The gene discussed is SMN1; the disease is spinal muscular atrophy, type 1.