Ongoing activity in identified neurons of the rat superior cervical ganglion before and after partial denervation of the submandibular gland

1990 ◽  
Vol 21 (6) ◽  
pp. 591-596
Author(s):  
A. Ya. Ivanov
Keyword(s):  
Submandibular Gland ◽  
Superior Cervical Ganglion ◽  
Identified Neurons ◽  
Ongoing Activity ◽  
Partial Denervation ◽  
Before And After ◽  
Cervical Ganglion

Late Discharges in Dog's Sympathetic Ganglia

1972 ◽  
Vol 50 (3) ◽  
pp. 263-269 ◽  
Author(s):  
S. S. Chen
Keyword(s):  
Superior Cervical Ganglion ◽  
Stimulus Frequency ◽  
Sympathetic Ganglia ◽  
Late Response ◽  
Before And After ◽  
Cervical Ganglion ◽  
High Stimulus ◽  
Time Courses ◽  
Preganglionic Stimulation ◽  
Muscarinic And Nicotinic Receptors

In the dog a preganglionic stimulation at a high stimulus frequency for 10–15 s elicited a two-wave response, early and late responses in the perfused ear (vasoconstriction), as well as early and late contractions in the nictitating membrane. Both the late contraction and the late response could be aborted by cooling the superior cervical ganglion, and restored by rewarming the ganglion. Both were resistant to atropine and hexamethonium combined. Their magnitude depended upon the duration of stimulation and upon the stimulus frequency used. Their time courses were similar both before and after hexamethonium or chilling. Therefore, it is concluded that they are manifestations of late discharges in the superior cervical ganglion, which are independent of both muscarinic and nicotinic receptors in the ganglion. A similar but less prominent phenomenon was demonstrated in the lumbosacral sympathetic ganglion of the dog by studying the responses of the retractor penis muscle and the perfused hind limb to preganglionic stimulation.

Submandibular salivary gland weight increase by administration of isoproterenol to rats

1962 ◽  
Vol 202 (3) ◽  
pp. 425-428 ◽  
Author(s):  
Herbert Wells
Keyword(s):  
Salivary Gland ◽  
Linear Relationship ◽  
Submandibular Gland ◽  
Superior Cervical Ganglion ◽  
Submandibular Salivary Gland ◽  
Lower Incisor ◽  
Gland Weight ◽  
Submandibular Salivary Glands ◽  
Percent Increase ◽  
Cervical Ganglion

Administration of isoproterenol, like amputation of lower incisor teeth, resulted in a marked increase in both the fresh and dry weights of the submandibular salivary glands of rats. There was a linear relationship between the percent increase in gland weight and the dose of isoproterenol between 10 and 160 mg/kg/day. Ten days after cessation of isoproterenol administration, the weight of the enlarged glands had receded to control levels. Although prior unilateral extirpation of the superior cervical ganglion inhibited the response to incisor amputation of the submandibular gland on the operated side, both glands enlarged to the same extent following administration of isoproterenol. When isoproterenol administration was combined with amputation of the incisors, the effects on gland weight were additive.

Evidence for a Blood Ganglion Barrier in the Superior Cervical Ganglion of the Rat

1982 ◽  
Vol 40 ◽  
pp. 204-204
Author(s):  
D. M. DePace
Keyword(s):  
Blood Vessels ◽  
Superior Cervical Ganglion ◽  
Peripheral Nerves ◽  
Time Schedule ◽  
Transmission Electron ◽  
Cervical Ganglion ◽  
The Central Nervous System ◽  
Cervical Ganglia ◽  
Capillary Circulation ◽  
And Control

The majority of blood vessels in the superior cervical ganglion possess a continuous endothelium with tight junctions. These same features have been associated with the blood brain barrier of the central nervous system and peripheral nerves. These vessels may perform a barrier function between the capillary circulation and the superior cervical ganglion. The permeability of the blood vessels in the superior cervical ganglion of the rat was tested by intravenous injection of horseradish peroxidase (HRP). Three experimental groups of four animals each were given intravenous HRP (Sigma Type II) in a dosage of.08 to.15 mg/gm body weight in.5 ml of.85% saline. The animals were sacrificed at five, ten or 15 minutes following administration of the tracer. Superior cervical ganglia were quickly removed and fixed by immersion in 2.5% glutaraldehyde in Sorenson's.1M phosphate buffer, pH 7.4. Three control animals received,5ml of saline without HRP. These were sacrificed on the same time schedule. Tissues from experimental and control animals were reacted for peroxidase activity and then processed for routine transmission electron microscopy.

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