<unk>  <unk> s) are a genetically and clinically heterogeneous group of rare debilitating disorders characterised by the degeneration of lower motor neurons (neuronal cells situated in the anterior horn of the<unk>  cord) and subsequent atrophy (wasting) of various muscle groups in the body. While some<unk> s lead to early infant death, other diseases of this group permit normal adult life with only mild weakness.
Spinal muscular atrophies
Distal hereditary motor neuronopathies
Congenital distal spinal muscular atrophy
Congenital muscular dystrophy
Madras motor neuron disease
Ataxic cerebral palsy
Infantile neuroaxonal dystrophy
Spinal muscular atrophy