[The specific characteristics of the intrahypothalamic connections in the regulation of motivational and emotional states].

59 neurons were recorded in 27 male white rats' ventromedial hypothalamus. In satiation after 1-2 day water and food deprivation, 24 neurons decreased (I type), 16 ones increased (II type) and 19 neurons did not change the frequency rate (III type). Single stimuli of lateral preoptic area and lateral hypothalamus induced mostly an activation in I type neurons whereas II and III types neurons revealed no definite pattern. Stimulation of contralateral similar area induced haphazard responses in I type neurons, mainly inhibitory ones in II type neurons, and an activation in III type neurons.