Neuronopathy, Distal Hereditary Motor, Autosomal Recessive 2, also known as distal hereditary motor neuropathy, jerash type, is related to distal spinal muscular atrophy 2 and distal hereditary motor neuronopathy type 2. An important gene associated with Neuronopathy, Distal Hereditary Motor, Autosomal Recessive 2 is SIGMAR1 (Sigma Non-Opioid Intracellular Receptor 1). Related phenotypes are decreased motor nerve conduction velocity and distal muscle weakness