[Reactivity of the hypothalamo-hypophyseal neurosecretory system of rats preferring and refusing alcohol].

Rats were kept for one and six hours in a thermal chamber at a temperature of -4 degrees C under conditions of free choice between 5% ethanol and water. Study of the morphological picture of the supraoptic and paraventricular nuclei of the hypothalamus and neurohypophysis of rats that preferred alcohol or rejected it has shown an inverse relationship between marked initial preference of alcohol and resistance of the hypothalamohypophyseal neurosecretory system of the animals to hypothermal exposure that exhausts the neurosecretory function.