El-Bermani A W, Chang T L
Am J Anat. 1979 Feb;154(2):277-81. doi: 10.1002/aja.1001540211.
By iontophoretically introducing, first, cobalt and, subsequently, sulfide ions into the vagus nerve, it is possible to trace sensory nerves to their endings in the rat lung. Nerve fibers and terminals are found predominantly in the adventitia of the airways and blood vessels. Some nerves are found in the submucosa of the bronchi and bronchioles. Some are found in the cardiac muscle on the periphery of pulmonary veins, and a few nerves are seen to end among smooth muslces of the blood vessels and the airways. At least three types of nerve endings can be identified at the light microscopic level: (1) free nerve endings; (2) brush-like endings; (3) knob-like terminals.
通过离子电渗法首先将钴离子、随后将硫离子导入迷走神经，可以追踪大鼠肺中感觉神经至其末梢。神经纤维和终末主要见于气道和血管的外膜。一些神经见于支气管和细支气管的黏膜下层。一些见于肺静脉周边的心肌，少数神经见于血管和气道的平滑肌之间并终止于此。在光学显微镜水平至少可识别出三种类型的神经末梢：(1) 游离神经末梢；(2) 刷状末梢；(3) 球状终末。
