Late answers in the electroneuromyography of patients with degenerative-dystrophic spine disorders

Abstract

We carried out electroneuromyography of 78 patients with degenerative-dystrophic cervical and lumbar spine disorders, which were treated at the neurosurgical department of the Irkutsk Scientific Centre of Surgery and Traumatology. The results of the study of late ENMG phenomena such as H-reflex, F-waves and A-reflex were obtained at different stages of the disease using “Neuromyan” neuromyoanalyzer. The predictable changes in late answers at different stages of the process were determined. For example, in patients with radiculopathy, the degree of neurological deficiency was minimal, and in patients with a combination of nerve root syndrome and stenotic changes, the neurological deficiency had the character of a pronounced bilateral pathology. The severity of changes in neurophysiological indicators depends on the degree of spinal stenosis. Determination of N-reflex and F-wave parameters allows us to identify subclinical forms of loss both at the level of peripheral nerves and of spinal cord segments, and the appearance of axon reflex is an evidence of a demyelinizing pathology and chronic process.