|
KMID : 0376219850220020221
|
|
Chonnam Medical Journal
1985 Volume.22 No. 2 p.221 ~ p.227
|
|
|
Effects of Stimulation of the Afferent Fibers of the Vagal Gastric Branches on the Submaxillary Secretion in Cats
|
|
|
|
|
Abstract
|
|
|
Little information is available in the literature concerning the neural mechanisms in reflex salivary secretion to the direct electrical stimulation of peripheral afferent nerve fibers. This study was aimed to investigate a reflex circuit arising from the stomach and causing salivary secretion in cats anesthetized with ketamine. The submaxillary ducts were canalled and salivary responses to the afferent stimulation of the gastric branches of vagus nerve were examined.
Spontaneous salivary secretion was not observed. Electrical stimulation of afferent fibers of either the ventral or dorsal gastric branch of the vagus elicited a salivary secretion from both submaxillary glands. Unilateral section of the vagus in the neck had no effect on the salivary response. However, the response disappeared completely when the vagus were cut bilaterally. The response was abolished by severing the chorda tympani or by the pretreatment with atropine, while it was affected neither by severing the cervical sympathetic nor by the pretreatment with phenoxybenzamine. The salivary response was decreased by superimposed stimulation of the cervical sympathetic.
These results indicate that the afferent fibers arising from the stomach and mediating salivary responses travel centrally in the vagus and that the salivary responses to the stimulation of either the ventral or dorsal gastric branch of the vagus are consensual in neuralgic nature as in the light reflex and the efferent paths of the reflex submaxillary secretion are the chorda tympani while the cervical sympathetic play a role in inhibiting the reflex secretion.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|