Study of microsurgical anatomy of Meckel's cave and adjacent structure in operation of middle cranial fossa
LIU Xiao-Dong, XU Qi-Wu
Chinese Journal of Clinical Anatomy ›› 2013, Vol. 31 ›› Issue (1) : 5-9.
Study of microsurgical anatomy of Meckel's cave and adjacent structure in operation of middle cranial fossa
Objective To obtain more detailed information about Meckel's cave and adjacent structures in order to offer anatomical base for clinical application. Methods Twenty sides of 10 adult cadaver heads fixed in formalin were used. The relationship of the main structures adjacent to Meckel's cave was observed. Result Meckel's cave is a cleft-like dural pocket that protruding from the posterior cranial fossa into the middle cranial fossa. The contents of the Meckel's cave are the sensory and motor roots of the trigeminal nerve, gasserian ganglion (GG), and the trigeminal cistern. The lengh, width, thickness of Meckel's cave is （14.53±0.98）mm, （15.24±1.29）mm and （4.95±0.54）mm, respectively. The average distance between porus trigeminus and Dorello's canal and IAC is （9.25±1.14）mm, （15.30±1.14）mm, respectively. The posterior part of the medial wall of Meckel's cave is separated from Dorell's canal by the petrosphenoidal ligament, and the inferior wall is separated from the ICA lacerum segment (C3) by the petrolingual ligament. Conclusion The medial wall of Meckel's cave, which directly contacts the venous channel of the cavernous sinus, is very thin, and maybe a weak point for tumor invasion to the cavernous sinus. The petrosphenoidal ligament and the petrolingual ligament can be regarded as anatomical landmarks to identify CN VI and ICA lacerum segment.
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