|
KMID : 0376219850220030387
|
|
Chonnam Medical Journal
1985 Volume.22 No. 3 p.387 ~ p.392
|
|
|
Patterns of the Unconditioned Reflex Secretion of the Submaxillary Gland in the Cat
|
|
|
|
|
Abstract
|
|
|
It is generally known that outflow from salivary glands is elicited reflexly by complicated neural mechanisms, even though a small amount of saliva is produced continuously by an inherent ability of the gland cells or by extracellular agents carried to the gland by blood or liberated from nerve endings. The reflex salivary secretion is classified into the conditioned and the unconditioned reflex. However, the reflex pattern of the unconditioned submaxillary secretion has not been fully clarified. The present study is undertaken to explore the neural pathway of the unconditioned reflex secretion of the submaxillary gland and to analyze the reflex pattern.
In ketamine-anesthetized cats, spontaneous submaxillary secretion was not observed. Stimulation of the central stump of lingual nerve or pharyngeal branch of the vagus produced a copious salivary secretion from the ipsilateral submaxillary gland and a scanty secretion from the contralateral gland as well. Stimulation of the central stump of ventral gastric branch of vagus elicited an abundant salivary secretion not only from the left submaxillary gland but also from the right one. The reflex secretion was abolished by severing the chorda tympani or by atropine treatment, whereas it was not affected by section of the cervical sympathetic or by phenoxybenzamine treatment.
These results indicate that the chorda tympani is the only efferent pathway evoking the unconditioned reflex secretion and the cervical sympathetic is not involved in the efferent pathway of the reflex, and that there are two types of reflex pattern in producing the unconditioned reflex secretion of the submaxillary gland, a autonomic reflex and a somato-autonomic reflex.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|