Analysis of Anthropometrics and Mechanomyography Signals as Forearm Flexion, Pronation and Supination Torque Predictors

Abstract

The aim of this study was to analyze anthropometrics and mechanomyography (MMG) signals as forearm flexion, pronation and supination torque predictors. Twenty-five young, healthy, male participants performed the isometric forearm flexion, pronation and supination tasks from 20 to 100% maximal voluntary contraction (MVC) maintaining right angle at elbow joint. Nine anthropometric measures and MMG signals from biceps brachii (BB), brachialis (BRA) and brachioradialis (BRD) muscles recorded using triaxial accelerometers were correlated with torque values. Significant positive correlations were found for arm circumference (CA) and MMG root mean square (RMS) values with flexion torque at five submaximal to maximal MVC levels. Flexion torque might be predicted using arm circumference (r = 0.426–0.557), a pseudo for muscle size and MMG RMS (r = 0.404–0.470), an indication of muscle activation.

A Review of Hand Gesture Recognition Systems Based on Noninvasive Wearable Sensors

“…[65] The excellent reliability and measurements of an accelerometer for muscle fiber sensing are particularly analyzed. [66] However, its reliability is prone to being affected by motion artefacts and a low signalto-noise ratio (SNR), and it often experiences interference from ambient noise. [66,67] As shown in Figure 7, most studies measure MMG signals from muscles on posterior of the forearm as the main muscle groups are wrist flexors and the wrist extensors.…”

“…[66] However, its reliability is prone to being affected by motion artefacts and a low signalto-noise ratio (SNR), and it often experiences interference from ambient noise. [66,67] As shown in Figure 7, most studies measure MMG signals from muscles on posterior of the forearm as the main muscle groups are wrist flexors and the wrist extensors. [68] If the MMG sensors are placed at the right position, the classification performance can reach more than 90%, but it can only reach 20% otherwise.…”