BIODYNAMIC PSYCHOTHERAPY,Model. Biodynamic Psychology is a form of body psychotherapy based on the idea that psychological and physical problems are linked. This method repose on the concept of psycho-peristaltism; emotions would be regulated by the intestines. Therefore if digestion does not go well then the body can no longer evacuate harmful emotions. During the session the therapist places his stethoscope on the abdomen of the patient, locate the sounds then does massages on the abdomen so as to release the tensions.