Assessment of neurofunctional activity in patients with vibration disease caused of local vibration

Abstract

Introduction. The stressful effect of local vibration contributes to the development of cerebral dysfunction with the formation of a sensorineural deficit in patients with vibration disease associated with exposure to local vibration.
 The study aims to identify the features of changes in somatosensory evoked potentials, neuroenergocarting and neuropsychological testing in patients with local vibration.
 Materials and methods. Scientists examined 103 patients with local vibration (group one), 35 healthy men (comparison group). We used methods of registration of somatosensory evoked potentials (SSEP), constant potential level (CPL), neuropsychological testing.
 Results. The authors revealed in the first group, in comparison with the other group, a significant increase in cerebral energy metabolism in the form of an increase in the level of constant potential in the frontal right and left (Fd, Fs), central (Cd, Cz, Cs), parietal (Pd, Pz, Ps), occipital (Oz), right and central temporal (Td, Tz) brain regions, increased latency of peaks N10, N11, N13, N30, peak interval N13–N18 at p<0.04, cognitive dysfunction with mild damage to prefrontal frontal lobes, inferior temporal and inferior parietal regions, parietal-temporal-occipital zone of the left hemisphere, as well as subcortical structures. The data of the correlation analysis indicate that the slowing down of the ascending somatosensory flow from the level of the brachial plexus ganglia to the ventroposterolateral nucleus of the thalamus contributes to the emergence of a compensatory state in the form of an increase in energy processes in the frontal-central and parietal parts of the cerebral cortex, causing the development of cognitive disorders.
 Limitations. The limitations of the study were the lack of studying the effects of local vibration on cerebral hemodynamics and the state of efferent pathways of the central nervous system in patients with local vibration.
 Conclusion. Signs of impaired neurofunctional activity in local vibration are an increase in the duration of peak intervals N10–N13 and N11–N13, the latency of peak N10, the level of constant potential of the frontal right and central left leads, the level of constant potential of interhemispheric relations in the central department, a decrease in categorical and conceptual thinking, short-term (auditory) memory, visual gnosis, expressive speech.
 Ethics. The study was conducted in compliance with Ethical standards developed in accordance with the Helsinki Declaration of the World Medical Association "Ethical principles of conducting scientific medical research with human participation" as amended in 2000 and "Rules of Clinical Practice in the Russian Federation" approved by Order of the Ministry of Health of the Russian Federation No. 266 dated 06/19/2003. Informed consent was received from each person to participate in the survey, approved in accordance with the established procedure by the Local Ethics Committee.