Surface EMG cross talk quantified at the motor unit population level for muscles of the hand, thigh, and calf
Carina Marconi Germer, Dario Farina, Leonardo Abdala Elias, Stefano Nuccio, François Hug, Alessandro Del Vecchio
Abstract
We proposed a new method for the identification and quantification of cross talk at the motor unit level. We show that surface EMG cross talk can lead to physiological misinterpretations of EMG signals such as overestimations in the muscle activity and intermuscular correlation. Cross talk had little influence on the EMG power spectrum, which indicates that conventional temporal filtering cannot minimize cross talk. Spatial filter (single and double differential) effectively reduces but not abolish cross talk.
Topics & Concepts
Motor unitThighPhysical medicine and rehabilitationHand musclesPopulationMotor unit recruitmentElectromyographyAnatomyLeg muscleMedicineEnvironmental healthMuscle activation and electromyography studiesAdvanced Sensor and Energy Harvesting MaterialsMotor Control and Adaptation