Term Name:	adult spinal muscular atrophy
Synonyms:	SMA4, spinal muscular atrophy 4, SPINAL MUSCULAR ATROPHY, ADULT FORM, SPINAL MUSCULAR ATROPHY, TYPE IV
Definition:	A spinal muscular atrophy that is characterized by progressive muscular weakness and motor disability that typically presents in the third decade of life and has_material_basis_in mutations in the SMN1 or SMN2 genes that are required for the survival of motor neurons.
Ontology:	Human Disease [DOID:0050529]   ( DOID:0050529 )