摘要目的:探讨冠状断面上动眼神经的解剖特征与MRI表现，为相关病变的影像诊断和外科手术提供解剖学依据。方法:取用成人尸头标本15例，经冰冻后，用电动断层带锯制成连续断层标本；用3.0 T MR扫描仪，获取10例成人志愿者的3D-CISS序列图像；在上述断层标本与MRI图像上观察动眼神经在冠状断面上的走行规律及毗邻关系。结果:动眼神经在经中脑脚间窝的断面上，呈“八”字形，紧贴两侧大脑脚向外下方走行，居大脑后动脉和小脑上动脉之间；在经海绵窦后份的断面上，位于“工”字形结构下端的左右两侧；在经海绵窦前份的断面上，位于前床突下方，颈内动脉的外侧；在经眶尖部的断面上，位于视神经和下直肌的外下方。结论:在冠状断面上可清晰显示动眼神经脑池段、海绵窦段和眶尖段的位置及其毗邻关系。
Abstract：Objective:To describe the coronal anatomical features and MR imaging of the oculomotor nerve in order to provide anatomic data for the imaging diagnosis and surgery of oculomotor nerve lesions. Methods:15 sets of adult heads were frozen and sectioned with an electric bandsaw into serial coronal sections; 10 healthy volunteers were examined by a 3D-CISS sequence using a 3.0-Tesla MR system; The sectional anatomy of the oculomotor nerve and its adjacent structures were identified on the coronal sectional plane and MR imaging.Results:The oculomotor nerve through the interpeduncal fossa runs lateral and inferiorly, shaping like the Chinese word “八”, and passes between the posterior cerebral arteries and superior cerebellar arteries; The oculomotor nerve across the posterior part of cavernous sinus located on both of the left and right side of diaphragma sellae; The oculomotor nerve across the anterior part of cavernous sinus located below the anterior clinoid process and outside the internal carotid artery; The oculomotor nerve across the orbital apex located lateral inferior to the optic nerve and inferior rectus muscle.Conclusions:The coronal section can demonstrate accurately the distribution, location and the relations to surrounding tissues of oculomotor nerve.
2013, Vol. 18 
