Question: If a pair of bipolar electrodes are placed over a muscle parallel to the muscle fibers, derive the expression for the potential difference between the two electrodes due to a current source on a muscle fiber. Show a sketch clearly showing the geometrical arrangement. What will be the measured potential if the electrodes are in a plane perpendicular to the fiber direction? Although it is convenient to assume a simple geometry of surface EMG recording, where the electrode pair is placed parallel to the orientation of the fibers and the fibers themselves run parallel to the surface, in practice, such simple geometries are rarely found. If the muscle fibers are at an angle, θ, to the electrode pair, what will be the observed potential? Need Assignment Help?
Determine an expression for the recorded potential, assuming a function P(t) for the single fiber action potential recorded monopolarly. Assume that the muscle fibers are parallel to the surface. State any other simplifying assumptions that you would like to make.