Amajor challenge in medicine is the substantial increase of chronically ill patients with multiple ailments. Conventional diagnostics may reveal important indicators of disease, but rarely detect the underlying regulatory blockades hindering the body’s healing. In case of multiple complaints, the question arises: which therapeutic stimulus does the body react to, if at all? Each body part and every body system, whether healthy or diseased, has a specific reaction pattern to weak, external stimuli. On the basis of this reaction pattern, valuable conclusions can be drawn on the state and the functionality of the examined organs and systems.