Avaliação dinâmica do exoesqueleto por EMG dos músculos trapézio, deltoide anterior e médio durante as atividades de elevação de membros superiores

Abstract

Surface electromyography (sEMG) signals are electrical activities that originate on the surface of the skin during muscle contractions. The analysis of these signals has as one of its applications the study of fatigue and muscle activation in worksplaces. The aim of this study was dynamically analyze the electromyographic patterns before and after using of the exoskeleton in upper limb elevation activities, to compare muscle activation groups in the Trapezius (Tr), Anterior Deltoid (AD) and Middle Deltoid (MD). Was performed in laboratory, an exploratory qualitative and quantitative study. Eight volunteers (06 men and 02 women) performed four sequences of shoulder flexion with and without load, with and without exoskeleton. A Miotec® electromyograph (Miotool 400) and the Miotec Suit software were used. The electromyographic signal was collected and the data processed in full by double threshold onset segmentation (DTOS) at each interval and the metric used to assess muscle activation was the root mean square (RMS). The results show a reduced reduction in na effort-related EMG trait (RMS) with the use of the exoskeleton (28% with no load and 10% with load for Anterior Deltoid). It was observed that the use of technology does not have no overall effectiveness for all study participants, as there was no reduction in muscle activity in some cases.