The paper presents the results of clinical-genealogic and electromyographic examination of 1157 patients with hereditary neuromuscular diseases from 689 families. Based on the long-term genetic registry and application of the computer multi-dimensional mathematical analysis, the authors elaborated clinical-electromyographic criteria for different forms of hereditary neuromuscular diseases by taking into account their etiologic heterogeneity. There were also general regularities and specific features of motor disorders indifferent clinical forms and at different stages of the pathological process. The findings are used by the Samara Medical-Genetic Center in its work.