Conclusion
In guinea-pigs, endogen histamine directly affects smooth muscle bronchial receptors and a vagal reflex is not implicated in such an action in our experiments. The action of atropine may be explained by an effect of histamine on the postganglionary parasympathetic neuron.
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Mordelet-Dambrine, M., Hartmann, C.H.G., Gateau, O. et al. Histamine release before and after vagotomy in anesthetized and artificially ventilated guinea pigs. Agents and Actions 7, 116 (1977). https://doi.org/10.1007/BF01964902
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DOI: https://doi.org/10.1007/BF01964902