Hume W R, Waterson J G
Blood Vessels. 1978;15(6):348-64. doi: 10.1159/000158181.
An examination of sections of the central artery of the rabbit external ear with the transmission electron microscope revealed a single and uniform population of axons near the medial-adventitial border. The dimensions of the neuromuscular cleft (mean closest distance 0.5 micrometer) and of the approaches between smooth muscle cells (not less than 20 nm) were determined. On the basis of the morphology of the neuronal vesicles and their ability to take up 5-hydroxydopamine the axons were classified as adrenergic, confirming previous light-microscopic histochemical observations. The axons also exhibited a weak but definite acetylcholinesterase activity in association with their sxon membrane, as shown by a histochemical technique.
用透射电子显微镜检查兔外耳中央动脉切片时，发现在中膜-外膜边界附近有单一且均匀的轴突群。测定了神经肌肉间隙的尺寸（平均最近距离为0.5微米）和平滑肌细胞间通道的尺寸（不少于20纳米）。根据神经元囊泡的形态及其摄取5-羟多巴胺的能力，这些轴突被归类为肾上腺素能的，这证实了先前的光镜组织化学观察结果。组织化学技术显示，轴突在其轴突膜上还表现出微弱但明确的乙酰胆碱酯酶活性。
