A STUDY OF THE COMPARATIVE PHYSIOLOGY OF THE GLOSSOPHARYNGEAL NERVE—RESPIRATORY REFLEX IN THE RABBIT, CAT AND DOG

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Abstract
In rabbits (6 used), stimulation of the central end of the glossopharyngeal nerve (except the carotid sinus branch, which may cause acceleration) gave rise to respiratory inhibition. In 14 cats the response was usually one of respiratory acceleration; more rarely inhibition, as in the rabbit. In 10 dogs the response was more variable ; a fair proportion responded with both inhibition and acceleration; while more responded with inhibition alone than with pure acceleration. A preliminary series of exps. indicates that section of the glossopharyngeal nerve does not influence the effect produced by deglutition on respiration; but glossopharyngeal nerve section does markedly increase the no. of swallowing movements elicited by stimulation of the central end of the superior laryngeal nerve.

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