<prompt> One of the following usually differentiates hysterical symptoms from hypochondriacal symptoms -Symptoms do not normally reflect understandable physiological or pathological mechanismPhysical symptoms are prominent which are not explained by organic factorsPersonality traits are significantSymptoms run a chronic course  <response>: The preoccupation in hypochondriasis is based on a misinterpretation of physical symptom in the presence of normal body function. For example, an occasional change in heart rate will lead a person with hypochondriasis to fear of severe heart disease.On the other hand, hysterical symptoms are not due to misinterpretation of physiological response. 