Peripheral axonal neuropathy Motor axonal neuropathy UMLS:C1854570 HP:0007349 Length dependent motor neuropathy Distal motor neuropathy is a bundled term that should not be used if more detailed information about the phenotype is available. HP:0007002 Progressive impairment of function of motor axons with muscle weakness, atrophy, and cramps. The deficits are length-dependent, meaning that muscles innervated by the longest nerves are affected first, so that for instance the arms are affected at a later age than the onset of deficits involving the lower leg. Distal motor neuropathy UMLS:C2749625 UMLS:C4020811