The method of calculating microstepping currents for variable reluctance stepping motor with equal microstep angle was described when motor torque characteristics were sinusoidal shapes.
The fibrotic tissue, pressure buildup, and diversion of blood from the hepatic circulation essentially reduces the number of functional sinusoidal veins, and the number of functional portal triads in general.
As the magnet rotates, the electrons are pushed to one side of the plate and then the other, and the voltage flips from positive to negative and back again in a sinusoidal shape.