EFEITO DA ESTIMULAÇÃO ELÉTRICA COM CORRENTE RUSSA NO REPARO MORFOLÓGICO DO NERVO FIBULAR DE RATOS APÓS NEURORRAFIA TÉRMINOLATERAL.

Introduction: when injured peripheral nerves can lead to a high loss of function for the patient. So many studies seek to propose techniques to accelerate functional recovery of a reinervado muscle. Thus, with the discovery of neurorraphy end-toside (NTL), without injury to the donor nerve, brought great contribution because any nerve can be used as donor nerve without damage to this or to the structures innervated by it. However, even with all technical refinement after neurorrhaphy, the time for axonal regeneration determine muscle fiber atrophy. In this context, electrostimulation have been proposed to accelerate the regenerative process, and minimize the functional losses. Objective: This study aimed to investigate the effectiveness of electrical stimulation with Russian current in morphological repair peroneal nerve of rats after end-side neurorraphy. Methodology: we used 50 Wistar rats, males, with 80 days of life, supplied by the Central Vivarium of Sacred Heart University (USC). The animals were randomly divided into five groups: Start Control Group (ICG), Control Group Final (GCF), denervated group (GD) Surgical Control Group (GCC), neurorrhaphy Group Finish-Side with Russian stimulation (GNTLER). Morphometric analyzes were performed nervous tissue of the rats from all five groups by comparing the nerve regeneration across the groups. Results: the GNTLER group showed a statistically significant difference when compared to GCC group associated to the average of the areas of nerve fibers (21.38 µm²/16.00 µm²) and myelin sheaths (14.23 µm²/10.32 µm²). The GNTLER and GCC groups showed no difference in the functional gait analysis. Conclusion: Based on the methodology employed can be concluded that there was improved axonal regeneration and myelination of nerve fibers. [ABSTRACT FROM AUTHOR]