Análise da sinergia entre os músculos masseter e deltoide considerando a carga voluntária máxima

Abstract

Introduction: the human body is composed of organs and systems that work in an interdependent manner for its proper functioning. Objective: given that muscles are the main components of the muscular system and have an important role in the stomatognathic apparatus, the present work aims to evaluate a possible contribution between the masseter and deltoid muscles considering their Maximum Voluntary Load (MVL). Methodology: from the data, initially the MVL of the muscles under study was obtained and later the recording of the electromyographic activity in different situations, with all the volunteers in an orthostatic position and arms extended horizontally forward, first with open mouth and, later, with closed mouth and clenched teeth in maximal intercuspal using the deltoid MVL in both situations. Twenty volunteers participated the research, 10 of each sex aged between 18 and 40 years. Results: when analyzing the means of the collections, it was possible to observe a behavioral pattern among the studied muscles in 68,75% of the volunteers. Conclusion: thus, there was a contribution in the activity of the masseter and deltoid muscles. Keywords: Muscle, Electromyography and Upper Extremity