Surface Electromyography of Masseter and Temporal Muscles With Use Percentage While Chewing on Candidates for Gastroplasty

Abstract

Background:Surface electromyography identifies changes in the electrical potential of the muscles during each contraction. The percentage of use is a way to treat values enabling comparison between groups. Aim:To analyze the electrical activity and the percentage of use of masseter and temporal muscles during chewing in candidates for gastric bypass. Methods:It was used Surface Electromyography Miotool 200,400 (Miotec (r), Porto Alegre/RS, Brazil) integrated with Miograph 2.0 software, involving patients between 20-40 years old. Were included data on electrical activity simultaneously and in pairs of temporal muscle groups and masseter at rest, maximum intercuspation and during the chewing of food previously classified. Results:Were enrolled 39 patients (59 women), mean age 27.1+/-5.7. The percentage of use focused on temporal muscle, in a range of 11-20, female literacy (n=11; 47.82) on the left side and 15 (65.21) on the right-hand side. In the male, nine (56.25) at left and 12 (75.00) on the right-hand side. In masseter, also in the range of 11 to 20, female literacy (n=10; 43.48) on the left side and 11 (47.83) on the right-hand side. In the male, nine (56.25) at left and eight (50.00) on the right-hand side. Conclusion:40-50% of the sample showed electrical activity in muscles (masseter and temporal) with variable values, and after processing into percentage value, facilitating the comparison of load of used electrical activity between the group, as well as usage percentage was obtained of muscle fibers 11-20% values involving, representing a range that is considered as a reference to the group studied. The gender was not a variable.

Masticatory function according to body mass index. Part II: electromyographic analysis

“…These results are in agreement with the study by Santos et al, 22 where the electrical activity of the masseter and temporalis muscles was analyzed in a voluntary maximal intercuspal squeeze in a group of obese candidates for gastroplasty in Brazil, it was observed that the left temporalis muscle presented a higher percentage of electrical activity than the right one. Furthermore, they are related to the results reported by Figueiredo et al, 23 who had already reported that in obese women, the electrical activity of the temporalis muscle presented certain asymmetries.…”

“…Material y Métodos: Se realizó un estudio observacional de corte transversal con una muestra de 21 participantes con una edad promedio de 22.9 ± 3.5 años, quienes fueron clasificados de acuerdo a su índice de masa corporal, formando tres grupos de estudio: peso normal (18,(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)9), sobrepeso (25,9) y obesidad (≥30.0), con siete participantes cada uno. La electromiografía de superficie evaluó los músculos superficiales de la masticación durante la fuerza de mordida máxima derecha e izquierda.…”

Tongue coupling as a therapeutic strategy: electromyographic analysis of different training approaches

“…The purpose of the rest was to analyze the quality of the signal and that of the MVC was to standardize the signal. In both, three collections were made in each situation, with an approximate 1-minute rest for muscle recovery in between collections 34 . The collection with the best signal quality of the three was chosen, according to the Fast Fourier Transform (FFT) frequency spectrum.…”

Sinais eletromiográficos como ferramenta de avaliação e hardware para comunicação alternativa

“…O potencial de ação gerado durante a contração muscular é captado pelos eletrodos na superfície da pele, na região do grupo muscular desejado 11 . Alguns testes realizados mostraram que o sistema de comunicação assistiva em questão tem grande potencial para o auxílio de usuários que não conseguem se comunicar devido a disfunções motoras graves e perda da fala 12,13 . A necessidade de recursos de adaptação, implica na necessidade de saber sobre o quadro motor e ferramentas de baixo e alto custo que proporcionem a adaptação 14 .…”