A relativistic cybernetic model for the personality disorders caused by head injuries.

A mathematical model is used to demonstrate the personality disturbances caused by head injuries. A formal triontic model of personality was developed to express the effects of head injuries. The mathematical system theory (internal model principle) and the relativistic cybernetics are essentially used to explain how severe head injuries destroy the structural homeostasis of personality by influencing the non-cognitive elements via the cognitive elements. Attention is particularly paid to the communication processes between the personality and its external universe.