Term Name:	intermediate spinal muscular atrophy
Synonyms:	MUSCULAR ATROPHY, SPINAL, INFANTILE CHRONIC FORM, MUSCULAR ATROPHY, SPINAL, INTERMEDIATE TYPE, SMA II, SMA2, spinal muscular atrophy 2, spinal muscular atrophy type II
Definition:	A childhood spinal muscular atrophy that is characterized by progressive muscular weakness and respiratory failure, develops in children between the ages of 6 and 12 months and drastically reduces length 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:0050530]   ( DOID:0050530 )