The parasympathetic vasodilator fibers in the trigeminal portion of the distal lingual nerve in the cat tongue.
The parasympathetic vasodilator fibers in the trigeminal portion of the distal lingual nerve in the cat tongue.
复制标题
猫舌头远端舌神经三叉神经部分的副交感血管舒张纤维。
DOI：
10.1152/ajpregu.1994.266.5.r1517
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
K. Karita
中科院分区：
文献类型：
--
作者：
H. Izumi;K. Karita
电刺激鼓室索神经（CTN）的外周和中央切端引起麻醉猫同侧舌血流量增加。自主神经节阻滞剂六甲铵（1.0 mg/kg）预处理可显著降低两种血流量的增加。电刺激CTN中央切端、下牙槽神经、迷走神经以及上颊龈也能引起交感切除猫舌的血管扩张反应。这些血管扩张明显减少了六甲铵预处理，几乎完全消除了远端舌神经（DLN）和舌神经本身，但没有被切除CTN。目前的数据表明，CTN的副交感神经血管舒张纤维不参与猫舌的体自主反射血管舒张，而体自主反射血管舒张反应的主要部分是由与DLN三叉神经部分一起作为猫舌血管舒张纤维运行的副交感神经纤维介导的。这也暗示有两组副交感神经血管扩张纤维，即一组来自CTN（面神经），另一组来自DLN的三叉神经部分（可能通过舌咽神经）。
Electrical stimulation of the peripheral and central cut ends of the chorda tympani nerve (CTN) caused an increase in ipsilateral tongue blood flow in anesthetized cats. Both blood flow increases were markedly reduced by pretreatment with the autonomic ganglionic blocker hexamethonium (1.0 mg/kg). Electrical stimulation of the central cut ends of the CTN, inferior alveolar nerve, and vagus nerve as well as of the upper buccal gingiva also caused the vasodilator responses in the sympathectomized cat tongue. These vasodilatations were notably reduced by hexamethonium pretreatment, and were almost completely abolished by the section of the distal lingual nerve (DLN) and the lingual nerve proper but not by section of the CTN. The present data suggest that the parasympathetic vasodilator fibers in the CTN are not involved in somatoautonomic reflex vasodilatation in the cat tongue and that the major part of the somatoautonomic reflex vasodilator response is mediated by parasympathetic fibers running together with the trigeminal portion of the DLN as vasodilator fibers in the cat tongue. This also implies that there are two groups of parasympathetic vasodilator fibers, that is, one originates from the CTN (the facial nerve) and other from the trigeminal portion of the DLN (probably via the glossopharyngeal nerve).