Any neuronopathy, distal hereditary motor in which the cause of the disease is a mutation in the DCTN1 gene. The disease is neuronopathy, distal hereditary motor, type 7B (MONDO_0011879, a Monarch Disease Ontology entry). Also known as: DCTN1 neuronopathy, distal hereditary motor, neuronopathy, distal hereditary motor caused by mutation in DCTN1.