论文部分内容阅读
在犬右心房表面脂肪组织中发现31±s13个神经节或1983±s331个神经元(n=6).在30只麻醉开胸犬的右心房神经节丛内注射尼古丁100μg,引起心脏各部分的正性或负性的变时性和变力性变化;注射生理盐水于右心房神经节丛或注射尼古丁(100μg和200μg)于右缘区神经节丛均未引起心功能变化,急性心脏去神经支配后,重复注射尼古丁在右心房神经节丛的同样部位仍然引起心脏的正性或负性反应.但反应率减少.研究表明,尼古丁可兴奋犬右心房神经节丛,内节后副交感神经元。节后交感神经元和传入神经元。这些对尼古丁敏感的神经元以不同张力调节着心脏各部分的功能。
31 ± s13 ganglions or 1983 ± s331 neurons (n = 6) were found in the right atrial appendage of canine. Nicotine 100 μg was injected intracranially into the right atrial ganglion of 30 anesthetized thoracodorsal dogs, causing various parts of the heart Positive or negative chronotropic and variability changes; injection of normal saline in the right atrial ganglion plexus or injection of nicotine (100μg and 200μg) in the right margin of the ganglion plexus did not cause changes in cardiac function, acute cardiac go After the innervation of the nerves, repeated injection of nicotine still causes a positive or negative cardiac response in the right part of the right atrial ganglion, but the response rate is reduced. Studies have shown that nicotine can excite canine right atrial ganglion plexus, internal parasympathetic yuan. Postganglionic sympathetic and afferent neurons. These nicotine-sensitive neurons regulate the function of various parts of the heart with different strains.