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Projections from pontine pneumotaxic center to medullary Botzinger complex in cats

Song Gang, Yu Ping, Liu Lei

Department of Physiology, Shandong Medical University. Jinan 250012, Shandong

Abstract

Experiments were done on 33 adult cats. After injection of WGA-HRP(5%, 30-60nl) into the Botzinger comples, labeled cells were observed in the lateral parabrachial nucleus and the Kolliker-Fuse nucleus. Injection into control sites failed to label the cells in the above two nuclei. Ninety-one respiratory related neurons recorded from the pneumotaxic center were tested by electrical stimulation of the Botzinger complex. Thirteen neurons(14.3%, inspiratory 11, phase-spanning 2)could be antidromically activated. Results of the present study showed that neurons in the pneumotaxic center sent axons to the Botzinger complex concerning respiratory control.

Key words: Pneumotoxic center;;;;

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Citing This Article：

Song Gang, Yu Ping, Liu Lei. Projections from pontine pneumotaxic center to medullary Botzinger complex in cats. Acta Physiol Sin 1996; 48 (1): (in Chinese with English abstract).