<unk> <unk>  HMN, dHMN), sometimes also called<unk>  hereditary motor neuropathies, are a genetically and clinically heterogeneous group of motor neuron diseases that result from genetic mutations in various genes and are characterized by degeneration and loss of motor neuron cells in the anterior horn of the spinal cord and subsequent muscle atrophy. Although they can hardly be distinguished from hereditary motor and sensory neuropathies on the clinical level, dHMNs are considered a separate class of disorders. Another common system of classification groups many of DHMNs under the heading of spinal muscular atrophies. __TOC__
Distal hereditary motor neuronopathies
Madras motor neuron disease
Spinal muscular atrophies
Motor neuron disease
Hereditary motor and sensory neuropathy
Congenital muscular dystrophy
Congenital distal spinal muscular atrophy
Autosomal recessive cerebellar ataxia