Rich useful information can be obtained from the muscles and researchers can use such information in a wide class of clinical and engineering applications by measuring surface electromyography (EMG) signals (Merletti & Parker, 2004). Normally, EMG signals are acquired by surface electrodes that are placed on the skin superimposed on the targeted muscle. In order to use the EMG signal as a diagn...

Cross-correlation between surface electromyogram (EMG) signals is commonly used as a means of quantifying EMG cross talk during voluntary activation. To examine the reliability of this method, the relationship between cross talk and the cross-correlation between surface EMG signals was examined by using model simulation. The simulation results illustrate an increase in cross talk with increasin...

The matrix type multielectrodes have been proved to be useful for getting the information of motor unit (MU) properties (Monster et al., 1980; Reucher et al., 1987; Yamada et al., 1987; Masuda and Sadoyama, 1988; Kleine et al., 2000; Gazzoni et al., 2004). By this electromyography (EMG) technique, we can obtain many essential properties of MU that could not be obtained by conventional surface E...

In this paper we introduce a new method for muscle force estimation from multi-channel surface electromyograms. The method combines a motor unit twitch model with motor unit innervation pulse trains, which are estimated from multi-channel surface electromyograms. The motor unit twitches are then aligned to the innervation pulse trains and summed up to obtain the total muscle force. The method w...

21 Oscillatory activity plays a crucial role in corticospinal control of muscle synergies 22 and is widely investigated using corticospinal and intermuscular synchronization. 23 However, the neurophysiological mechanisms that translate these rhythmic patterns 24 into surface electromyography (EMG) are not well understood. This is underscored 25 by the ongoing debate on the rectification of surf...

This study aimed to evaluate the use of ictal EEG recordings combined with simultaneous surface EMG in the diagnosis and analysis of motor events, both epileptic and nonepileptic. All ictal registrations were performed utilizing radio/cable telemetry. Routine recordings consisted of 18-channel EEG plus 8-channels bipolar surface EMG in freely moving patients. Combined ictal EEG-EMG recordings i...

Oscillatory activity plays a crucial role in corticospinal control of muscle synergies and is widely investigated using corticospinal and intermuscular synchronization. However, the neurophysiological mechanisms that translate these rhythmic patterns into surface electromyography (EMG) are not well understood. This is underscored by the ongoing debate on the rectification of surface EMG before ...

The aim of this paper is to introduce an extension to a force estimation technique based on activity index and to compare it to two other muscle force estimation techniques that also use the motor control information on the same set of surface EMG signals. Our new method is called motor unit twitch force technique and the compared methods include motor unit action potential rate and activity in...

This study aims at proposing an efficient method for automated electrocardiography (ECG) artifact removal from surface electromyography (EMG) signals recorded from upper trunk muscles. Wavelet transform is applied to the simulated data set of corrupted surface EMG signals to create multidimensional signal. Afterward, independent component analysis (ICA) is used to separate ECG artifact componen...

EMG-Driven models predict individual muscle forces, but it is necessary to obtain muscle electromyography (EMG), which is difficult for deep muscle, as vastus intermedius (VI). The purpose of this study is to determine the relative contribution of each quadriceps (QF) components to the knee extension torque by EMG-Driven model, with a protocol of surface VI EMG acquisition, at submaximal isomet...