Mechanomyographic and Electromyographic Responses of the Vastus Medialis Muscle During Isometric and Concentric Muscle Actions

Effect of diathermy on muscle temperature, electromyography, and mechanomyography

“…In the present study, MMG IMF increased up to Ϸ50% MVC, then plateaued to 90% MVC (Fig. 3), which was consistent with the findings of Coburn et al 8 and Beck et al 4 With further validation, it is possible that the frequency domain of the MMG signal may be useful as a noninvasive tool to estimate the global firing rate of active muscles during isometric ramp contractions. The subtle differences among the findings of our study and those of Beck et al 4 and Coburn et al 8 may be related to differences between isometric step and ramp contractions.…”

“…Indeed, previous studies from our laboratory have reported similar increases in MMG center frequency during isometric step 4 and ramp 37 contractions. Coburn et al 8 demonstrated a nonsignificant increase in MMG center frequency with increasing isometric force production for the vastus medialis muscle, while Beck et al 4 reported significant increases in MMG center frequency for the biceps brachii muscle during submaximal to maximal isometric step contractions. In the present study, MMG IMF increased up to Ϸ50% MVC, then plateaued to 90% MVC (Fig.…”

Avaliação da fadiga muscular pela mecanomiografia durante a aplicação de um protocolo de EENM

“…There is a relationship between the MMG signal and torque during voluntary contraction 17 , and most studies only describe the use of MMG in this kind of contraction 17,[33][34][35] . Only a few studies describe the use of MMG during NMES 13,23 , therefore some parameters of MMG application described in the methodology of this article are based on studies that used the technique during voluntary muscle contraction.…”

“…The generator produced a sine-wave signal at various frequencies (10,11,12,13,14,15,16,17,18,19,20,25,30,35 and 40 Hz with two-decimal-place precision). The MMG sensor was positioned on the mechanical wave driver and satisfactorily measured all the frequencies, suffering only decimal-place variations and the influence of the low-frequency harmonics.…”

Dynamic monitoring of forearm muscles using one-dimensional sonomyography system

“…For example, MMG is the sound generated by a muscle during its contraction and is used as a measure of mechanical muscle changes during contraction [17]. Recently, it has been widely analyzed along with EMG for different purposes [18][19][20], such as control of a prosthesis with 2 degrees of freedom [21]. However, MMG can be affected by many factors, such as muscle temperature [22], skinfold thickness [23], and external mechanical noise [24].…”