Comparative analysis of respiratory reactions to microinjection of gaba and penicillin into the Bötzinger complex and the pre-Bötzinger complex in rats

In acute experiments on anesthetized rats, the respiratory responses to local administration of GABA ($10^{-5}$ М) and noncompetitive GABAA antagonist penicillin ($10^{-7}$ М) into Bötzinger complex (BC) and pre-Bötzinger complex (PBC) were studied. The differences in the responses of respiratory frequency, inspiratory and expiratory duration after injection of GABA into the BC and PBC were found. The effects were more pronounced when GABA administered into the PBC. It is shown that the response of tidal volume, in contrast, was more frequent when both GABA and penicillin injected into the BC. The question of the role of GABA$_{\scriptsize{А}}$ receptors of BC and PBC in the realization of the inhibitory action of GABA on the temporal and volumetric parameters of breathing pattern is discussed.