Spinal Muscular Atrophy, Type Iii, also known as juvenile spinal muscular atrophy, is related to spinal muscular atrophy with lower extremity predominant and spinal muscular atrophy, and has symptoms including muscle cramp and tremor of hands. An important gene associated with Spinal Muscular Atrophy, Type Iii is SMN1 (Survival Of Motor Neuron 1, Telomeric), and among its related pathways/superpathways is SARS-CoV-2 modulates host translation machinery. The drugs Risdiplam and Immunoglobulins have been mentioned in the context of this disorder. Affiliated tissues include spinal cord and brain, and related phenotypes are proximal lower limb amyotrophy and pelvic girdle muscle weakness