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Effect of selective lesions in hypothalamus on bilateral synchronized bursts of rat oxytocin neurons

Yang Diansheng, Wang Ping, Yang Xiaotian, Wang Kai, Fu Chunfang, Wang Yufeng

Department of Physiology,Medical College of Jiamusi University.Jiamusi 154002,Xinjiang

Abstract

In order to clarify the location of the center for synchronized milk-ejection bursts of magnocellular oxytocin neurons in the hypothalamus, the bursts of these neurons were recorded extracellularly in lactating rats with selectively-cutting lesions of the middle brain or hypothalamus. Results showed that unilateral transection of the middle midbrain above the ventral tegmentum did not block the synchronized bursts on both sides; however, the synchronized bursts disappeared after unilateral transection through the middle of the medial hypothalamus.

Key words: Milk ejection reflex;Burst synchronization center;Oxytocin neuron;Supraoptic nucleus;Hypothalamus rat;

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Citing This Article：

Yang Diansheng, Wang Ping, Yang Xiaotian, Wang Kai, Fu Chunfang, Wang Yufeng. Effect of selective lesions in hypothalamus on bilateral synchronized bursts of rat oxytocin neurons. Acta Physiol Sin 1999; 51 (4): (in Chinese with English abstract).