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KMID : 0376219830200010077
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Chonnam Medical Journal
1983 Volume.20 No. 1 p.77 ~ p.84
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Effects of the Submaxillary Blood Flow Changes on the Submaxillary Secretion in Cats
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Abstract
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It is well known that stimulation of the chorda tympani produces a copious submaxillary secretion and greatly increases its blood flow. But the effects of the cervical sympathetic on the submaxillary secretion and its blood flow are complicated. Stimulation of the cervical sympathetic elicits scanty submaxillary flow, which is usually short lasting and tends to cease in spite of continuous stimulation, and markedly decreases its blood flow. On the other hand, the reflex submaxillary secretion and blood flow decrease upon the cervical sympathetic stimulation. Salivation is depressed not only when chorda discharge is blocked with atropine, but also during sympathetic discharge resulting from such as fright, apprehension or catecholamine injection. Furthermore, sympathetic stimulation produces vasoconstriction. Thus chorda tympani is serectory under normal circumstances, whereas sympathetic seems to be inhibitory. It seems to be that blood flow to the submaxillary gland has an intimate relationship to the salivary secretion, In this study, the effects of the submaxillary blood flow changes on the submaxillary secretion were investigated in ketamine-anesthetized cat.
Stimulation of the chorda tympani or infusion of pilocarpine evoked a copious submaxillary salivation and an increase in blood flow, and the responses were remarkably decreased by the superimposed stimulation of the cervical sympathetic or injection of norepinephrine. Ligation of the common carotid artery on the ipsilateral side revealed similar decrements in the responses. The inhibitory effects of the cervical sympathetic on the submaxillary salivation and its blood flow were
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