Distal hereditary motor neuronopathies
Human disease

Distal hereditary motor neuronopathies (distal HMNs, DHMNs, or dHMNs; sometimes also called distal 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.
Classification
In 1993, A. E. Hardnig proposed to classify hereditary motor neuropathies into seven groups based on age at onset, mode of inheritance, and presence of additional features.
“Distal hereditary motor neuronopathies” enters the record as human disease. Crown Archives preserves that source wording while asking what Distal, hereditary and motor can confirm, complicate or overturn.
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This entry incorporates text from “Distal hereditary motor neuronopathies” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.