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KMID : 0376219820190010021
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Chonnam Medical Journal
1982 Volume.19 No. 1 p.21 ~ p.26
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The Reflex Parotid Salivation in Cats-Effect of the Cervical Sympathetics on the Reflex Salivation
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Abstract
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In ketamine-anesthetized cats, the parotid duct was cannulated with a polyethylene tube and salivary flow through the cannulated tube was recorded with drop counter recording system.
Spontaneous salivary secretion was not observed. Stimulation of the central end of the pharyngeal branch of the vagus or that of the lingual nerve reflexly elicited copious parotid salivation and the response was remarkably decreased by superimposed excitation of the cervical sympathetics or by the administration of norepinephrine. The reflexly evoked parotid salivation by stimulation of the lingual nerve was markedly increased by superimposed stimulation of the pharyngeal branch of the vagus. The responses of the gland to stimulation of these afferent nerves were immediately blocked by the administration of atropine. Salivary flow from the gland induced by the administration of pilocarpine was increased either by stimulation of the central end of the pharyngeal branch of the vagus or by that of the lingual nerve.
These results suggest that afferent fibers eliciting the reflex parotid salivation are contained in the pharyngeal branch of the vagus and the lingual nerves, and that the cervical sympathetic fibers play a role in inhibiting the reflex parotid salivation evoked by stimulation of these afferent fibers.
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