展神经脑桥池段的血管神经关系及临床意义

目的　研究展神经脑桥池段与邻近血管的关系，为有关疾病诊治提供相关解剖学基础。 方法　采用23例（46侧）红色乳胶灌注的头颅标本，解剖与观测展神经脑桥池段走行、与周围血管关系、滋养血管来源等，测量数据统计处理。 结果　展神经脑桥池段邻近的血管包括小脑下前动脉、小脑下后动脉、迷路动脉、椎动脉、基底动脉、脑桥动脉。小脑下前动脉与展神经关系最为密切（47.8%接触,13.8%压迫），椎基底动脉压迫展神经最严重。展神经脑桥池段的滋养动脉主要来自脑桥动脉（41.3%），其次为小脑下前动脉（26.1%）；16侧（34.8%）展神经为复式。 结论　展神经脑桥池段与邻近血管的关系复杂，血管易于接触并压迫展神经，临床上不明原因的展神经麻痹应考虑存在此类血管压迫的可能。

The neurovascular relationship and clinical significance of cistemal segment of abducent nerve

Objective　To study the neurovascular relation of the abducent nerve in pons’ segments and its surrounding vessels, providing for more information for clinic medicine and the domestic study of abducent nerve.　Methods　The abducent nerve’s vascular passage and the relation between its surrounding vessels and itself were observed and measured along with the segments in abducent nerve and other correlative data by dissecting 23 heads injected with red latex.　Results　Anterior inferior cerebellar artery(AICA), posterior inferior cerebellar artery (PICA), labyrinthine artery, pontine artery, vertebral artery, basilar artery were included in the surrounding vessels of the pons’ segments. 16 specimens of the heads turned out to be duplicated abducent nerve carriers. The abducent nerve contacted with AICI in the most of specimens ( 47.8% touching, 13.8% pressing) and the heaviest press for it came from vertebral artery. Pontine artery was the biggest nutrition provider for the segments in the abducent nerve (41.3%) followed by AICA (26.1%). The duplicated abducent nerve had been observed in sixteen specimens(34.8%).　Conclusions　The neurovascular relation between the cistemal segment of abducent nerve and its surrounding vessels is intricate, which is likely to cause the contact between vessels and abducent nerves or compression of the vessels over the nerves. This study may help to solve the problem when faced with abducent nerve palsy patients with unknown causes.