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KMID : 0376219850220020213
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Chonnam Medical Journal
1985 Volume.22 No. 2 p.213 ~ p.219
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Consensual Salivary Reflex in the Submaxillary Glands of the Cat
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Abstract
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It is known that the stimulation of either the afferent fibers of the vaginal pharyngeal branch or the lingual nerve elicits a copious salivary secretion from the ipsilateral submaxillary gland. The present study was aimed to explore the serectory responses in the contralateral submaxillary glands to the stimulation of the afferent fibers of the unilateral lingual nerve and further to clarify its serectory mechanisms.
The cats were anesthetized with ketamine. Spontaneous submaxillary secretion was not observed. Stimulation of the central end of the lingual nerve elicited a copious salivary secretion from the ipsilateral submaxillary gland and a scanty secretion from the contralateral gland as well. The salivary response in the contralateral gland was augmented by the physostigmine injected into the common carotid artery of the same side. Neither severing the cervical sympathetic nor pretreatment with phenoxybenzamine affected the salivary response. However, the response was abolished by severing the chorda tympani or by pretreatment with atropine. Acetylcholine injected into one of the common carotid arteries evoked salivary secretion from the ipsilateral submaxillary gland, but no secretion from the contralateral gland. Intraarterial injection of pilocarpine evoked copious salivary secretion from both glands. The response to intraarterial acetylcholine was due to direct stimulation and confined in the ipsilateral gland, suggesting that this chemical agent might be rapidly broken down into an inactive substance.
These results indicate that the contralateral salivary response to the stimulation of the afferent fibers of the unilateral lingual nerve is caused by specific neural mechanism, not by the neurotransmitter transported through the blood flow from the ipsilateral gland. This is tentatively termed as "consensual salivary reflex."
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