Neuronopathy, Distal Hereditary Motor, Autosomal Dominant 1, also known as spinal muscular atrophy, distal, juvenile, autosomal dominant, harding type i, is related to distal hereditary motor neuronopathy type 1 and neuromyotonia and axonal neuropathy, autosomal recessive. An important gene associated with Neuronopathy, Distal Hereditary Motor, Autosomal Dominant 1 is IGHMBP2 (Immunoglobulin Mu DNA Binding Protein 2).