窦神经传入终末兴奋性的研究。
Studies on the excitability of sinus nerve afferent terminals.
作者信息
Jordan D, Spyer K M
出版信息
J Physiol. 1979 Dec;297(0):123-34. doi: 10.1113/jphysiol.1979.sp013031.
Abstract
- The excitability of sinus nerve afferent terminals within the nucleus of the tractus solitarius has been studied in cats and rabbits using the technique of antidromic activation. 2. Conditioning stimuli to the hypothalamic defence area increased the excitability of some glossopharyngeal nerve afferents, though no such effects were observed on sinus nerve terminals. 3. Although the excitability of superior laryngeal nerve afferent terminals was observed to fluctuate in phase with the central respiratory cycle, no equivalent variation in sinus nerve terminal excitability were observed. 4. It is concluded that sinus nerve afferent terminals are not influenced by presynaptic mechanisms. Possible sites for the observed modulations of baroreceptor and chemoreceptor reflexes are discussed in the light of these results.
摘要
- 运用逆向激活技术，在猫和兔身上研究了孤束核内窦神经传入终末的兴奋性。2. 对下丘脑防御区施加条件刺激可增加一些舌咽神经传入纤维的兴奋性，不过在窦神经终末未观察到此类效应。3. 尽管观察到喉上神经传入终末的兴奋性随中枢呼吸周期呈相位波动，但未观察到窦神经终末兴奋性有类似变化。4. 得出的结论是，窦神经传入终末不受突触前机制影响。根据这些结果讨论了压力感受器和化学感受器反射所观察到的调制的可能部位。
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