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Effects of microinjection of sodium glutamate and glycine into ventrolateral nucleus of tractus solitarius on the discharges of phrenic nerve in rabbits

Liu Shixiang, Wei Shujun, Zhou Dingbang, Fan Yalan

Department of Neurology, Kunming General Hospital. Kunming 650032, Yunnan； China

Abstract

The effects of microinjection of sodium glutamate and glycine into ventrolateral nucleus of tractus solitarius (VLNTS) on the discharges of phrenic nerve were observed on 40 anaesthetized, vagotomized, paralyzed and artificially ventilated rabbits. The results were as follows: Phrenic nerve discharges were increased. Inspiratory duration prolonged, expiratory duration shortened and respiratory frequency not changed by microinjection of sodium glutamate into VLNTS. While by microinjection of glycine, phrenic nerve discharges were decreased, even abolished, inspiratory duration shortened, expiratory duration irregularly prolonged and respiratory frequency decreased.

Key words: Ventrolateral nucleus of tractus solitarius;Phrenic nerve discharges;Sodium glutamate;Glycine glycine

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Citing This Article：

Liu Shixiang, Wei Shujun, Zhou Dingbang, Fan Yalan. Effects of microinjection of sodium glutamate and glycine into ventrolateral nucleus of tractus solitarius on the discharges of phrenic nerve in rabbits. Acta Physiol Sin 1997; 49 (2): (in Chinese with English abstract).