Amplitude indicators and spatial aliasing in high density surface electromyography recordings

Complexity Analysis of Surface Electromyography for Assessing the Myoelectric Manifestation of Muscle Fatigue: A Review

“…Both possibilities are arguable though, given they are valid for the specific case electrodes and fibres reside in parallel directions and because the conduction velocity differs between motor units. Moreover, the definition of appropriate inter-electrode distance in bipolar recording should not be based on the avoidance of spectral dips and of spatial aliasing [ 28 ] but on whether and how much both affect the possibility of extracting physiologically relevant information from the electromyogram. Although short distances may help attenuating the detection of undesired sources, non-targeted muscles, it may result in the detection of signals unrepresentative of the whole, target muscles.…”

Stimulation map for control of functional grasp based on multi-channel EMG recordings

“…The question that deserves more elaboration in future studies is how to improve the recording system if a more sophisticated analysis of signals is of interest [27] . In our case, the envelopes (rectified, filtered signals at 5 Hz) were used to select areas in the paretic arm that showed no or low EMG activity when compared to the recordings from the nonparetic arm.…”

Design of sEMG assembly to detect external anal sphincter activity: a proof of concept

“…The recording points of a SD configuration placed at the same distance from the orifice, parallel with EAS fibres, sample this projection of the biopotential as it travels from one point to the other. Thus, the distance of the recording points should be informed by features such as the surface velocity of the electrical potential and its spatial frequency [9,10]. As for the location of the points, in SD recording, it is advised to place the recording points between an IZ and EZ pair [11,12] for reproducibility and signal strength.…”