The normal function of the organism in various stages of activity can be seen as a process of mutual interaction of different regulation mechanisms building up the behaviour of the organism in changing situations and/or ages and/or levels of health or disease. Insights into these very complex relations which steer the action of the organism are particularly important for the study of internal medi cine. They can be seen as directly related to the understanding of pathological conditions. Recently, the medical community has focused its interest on the physiology and pathophysiology of events...