[Clinico-electromyographic characteristics of amyotrophic lateral sclerosis and the syndrome of amyotrophic lateral sclerosis of vertebrogenic etiology]. / Kliniko-élektromiograficheskaia kharakteristika bokovogo amiotroficheskogo skleroza i sindroma bokovogo amiotroficheskogo skleroza vertebrogennoi étiologii.

Fifteen patients with lateral amyotrophic sclerosis (LAS) and 37 patients with the LAS syndrome of vertebrogenic etiology were examined by global electromyography and recording of the H-reflex. The findings confirmed the diagnostic significance of electromyography in specifying the localization and severity of the pathological process. The method of monsynaptic testing was found to be especially valuable for diagnosing the disease at the early stage of development which helps to differentiate between LAS and the LAS syndrome of vertebrogenic etiology.