[The acceleration of the acquisition of a conditioned reflex to time in rats with destruction of the suprachiasmatic nuclei of the hypothalamus].

In male rats sound conditioned reflex with water reinforcement was gradually (within 14-16 daily training sessions) was replaced by a conditioned reflex to time. After the bilateral lesions of the suprachiasmatic nuclei of hypothalamus, the necessary level of timing performance was reached sooner than in the animals with a partial destruction of the nuclei.