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Differences in Parasympathetic Vasodilator and Salivary Responses in the Cat Submandibular Gland between Lingual and Chorda-lingual Nerve Stimulation

Department of Orofacial Functions, Tohoku University School of Dentistry, Sendai 980-8575, Japan

H. Izumi

Department of Orofacial Functions, Tohoku University School of Dentistry, Sendai 980-8575, Japan, izumi{at}physiol.dent.tohoku.ac.jp

I. Nakamura

Hospital Pharmacy, Tohoku University School of Dentistry, Sendai 980-8575, Japan

K. Karita

Department of Orofacial Functions, Tohoku University School of Dentistry, Sendai 980-8575, Japan

Experimental activation of parasympathetic vasodilatation and salivation in the submandibular gland by a "pseudoreflex" method has definite advantages over other commonly used methods. However, it is unclear which stimulation sites allow for avoidance of direct activation of the parasympathetic efferents to this gland. We examined this question in heavily anesthetized (a-chloralose and urethane), artificially ventilated, cervically vagosympathectomized cats, using the intersection of the chorda-lingual nerve and the submandibular gland duct ("the intersection") as our reference point. Both vasodilatation and salivation evoked by electrical stimulation of the lingual nerve were abolished by section of the chorda-lingual nerve (10 mm proximal to the intersection), provided the stimulation site was distal to the intersection by 4 mm or more. This salivation was abolished by the muscarinic receptor antagonist, scopolamine. Thus, by careful choice of stimulation site, submandibular gland responses mediated solely by reflex parasympathetic mechanisms can be evoked by lingual nerve stimulation in this preparation.

Key Words: parasympathetic reflex • vasodilatation • salivation • submandibular gland • cat

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Journal of Dental Research, Vol. 80, No. 2, 484-489 (2001)
DOI: 10.1177/00220345010800021601


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This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Sato, A. Articles by Karita, K. Search for Related Content PubMed PubMed Citation Articles by Sato, A. Articles by Karita, K. Social Bookmarking                         What's this?