Activities of vagal receptors in the different phases of sneeze in cats

Respiration Physiology
F WalloisB Duron

Abstract

We studied the activity of 50 slow-adapting receptors (SAR), 13 rapidly-adapting receptors (RAR) and 3 expiratory modulated receptors in the different phases of sneeze in tracheostomized and non-tracheostomized anaesthetized cats. SAR activity increased progressively during the first phase of the preparatory inspiration in parallel to integrated diaphragmatic activity. During the second phase of the preparatory inspiration, SAR increased their discharge frequency; higher threshold SAR and RAR were recruited. During the compressive phase, discharge of SAR kept stable or increased slightly in parallel to an increase in transpulmonary pressure, while expiratory modulated receptors were activated. During the expulsive phase, only RAR were activated. Increase in transpulmonary pressure at the end of the inspiration phase of sneeze shortened expiratory duration and increased the rate of rise of expiratory muscle activity. Increase in transpulmonary pressure at the end of the compressive phase further shortened expiratory duration. These results suggest: first, a facilitatory effect on the triggering of the second phase of the preparatory inspiration from SAR; second, a modulation of the early stage of expiration by SAR, RAR and expir...Continue Reading

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Citations

Dec 10, 2008·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·V LlaurensC Faurie
Feb 4, 2012·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Donatella MutoloTito Pantaleo
Sep 18, 2020·Respiratory Physiology & Neurobiology·Ivan PoliacekJana Plevkova
Apr 4, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Lujain AloumGeorg A Petroianu

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