ABSTRACT
Excitable tissue, when activated, will be found to generate currents both within itself and also in all surrounding conducting media. Volume conductor is usually assumed to be a monodomain, isotropic, resistive, and homogeneous. This chapter considers the properties of the volume conductor as it pertains to the evaluation of electric and magnetic fields. The electric and magnetic field sources are described as a function of position and time, which has the dimensions of current per unit area or dipole moment per unit volume. Sources may also be established exogenously, as exemplied by electric or magnetic field stimulation. The chapter focuses on a description of the volume conductor as it affects the electric and magnetic fields that are established in it.
