[The borders of hysteria].
Medical writing dealing with the nosology of hysteria has evolved through successive national and international classifications, while in parallel the expression of hysteria has changed with time, with cultural evolution and with increased medical knowledge. Hysteria, by definition, is distinguished both by psychic or physical symptoms reported or voluntarily induced by patients (simulation or pathomimic behaviour) and by somatic disorders having an underlying, associated organic pathology, favoured by an emotional context or a conflictual situation (psychosomatic disorders). The divergence, but above all the analogies between hysterical symptoms and such limits are underlined, showing the frequency of succession with time, associations and transitional forms ("somatisation disorder" of the DSM III, psychogenic pain, and psychosomatic disorders termed "psychofunctional").