3D position estimation of the motor unit from surface EMG signals

This paper deals with an estimation problem of three-dimensional position of a motor unit(MU). When a MU is active, it produces an electrical signal called motor unit action potentials. This phenomenon is expressed by Poisson equation. We propose a method to estimate the depolarization position of MUs from the surface electromyogram using a finite element method and a steepest descent method. The simulation result show good agreement between the estimated position and real position.