EMSFT provides the key to understanding how alternating signals are created within the body by all ions, molecules, proteins etc, inside cells, outside cells, and provide the means by which the various components including organs of the body communicate with each other. As with the hydrogen atom, each time the ambient energy or temperature surrounding an atomic compound changes, it induces the changes in state of the compound and its fields. That the fields, too, can change state is due to the photon's SFT that provides the theory to understand the spectroscopy of the EM field. Thus EM fields are the staple of biological management by the body itself, and hence can be used as a means to intervene medically. This medical intervention is illustrated by the use of acoustic frequencies to treat core lesions of thoroughbred horses.