<unk>  (also known as "Severe infantile spinal muscular atrophy", or "spinal muscular atrophy type I") is an autosomal recessive neuromuscular disease. It is the most severe form of spinal muscular atrophy, which is one of a number of neuromuscular diseases classified as a type of muscular dystrophy.<unk><unk>  affects the lower motor neurons only.
Werdnig-Hoffman disease
Bonnemann-Meinecke-Reich syndrome
Urbach–Wiethe disease
Camurati-Engelmann disease
Scheuermann's disease
Fox-Fordyce disease
Beckwith-Wiedemann syndrome
Klüver-Bucy syndrome