[Chronic hypernatremia. A study of plasma neurophysins and action of morphine]

The hypothalamo-neurohypophyseal function was evaluated in a patient with the chronic hypernatremia syndrome. By dosing plasmatic neurophysins, a selective loss of the osmoreceptor function was demonstrated. Morphine administration was followed by a reduction of the diuresis and a slight elevation of plasmatic neurophysins. The mechanism of morphine action is discussed.