Objective To investigate the changes in blood pressure and serum norepinephrine after stretching the superior cervical sympathetic ganglia.Methods The superior cervical sympathetic ganglia of 10 rabbits were stretched to simulate the physical stimulation of cervicogenic hypertension.The blood pressure and content of norepinephrine in serum were observed and the observations were correlated.Results The rabbits' blood pressure had risen significantly after the stretching.The content of norepinephrine in serum had also increased significantly.The changes in blood pressure and norepinephrine content showed significant correlation.Conclusion The changes in blood pressure and serum norepinephrine after stretching of the superior cervical sympathetic ganglia show significant correlation,at least in rabbits.

Objective To explore the effect of pulling cervical sympathetic ganglia on blood pressure of experimental rabbit. Methods Anesthetized experimental rabbit were dominated the change of blood pressure with intubation via femoral artery. The electrocardiogram was recorded with standard lead II of electrocardiography, the cervical sympathetic ganglia was separated and the ganglion was ligated, with 20 g quality to the ventral top force, then the blood pressure was recorded and analyzed. Results Before pulling, the blood pressure maintained at 110/80 mmHg, and during the process of separating the neck nerve, the blood pressure increased temporarily. During pulling cervical sympathetic ganglia, it decreased about 20 s and then increased gradually and maintained at 125/90 mmHg until the end of pulling. Conclusion Pulling cervical sympathetic ganglia could significantly increase the blood pressure of experimental rabbit.