=====Temporal occipital transtentorial transpetrosal ridge approach===== The modified temporal occipital transtentorial transpetrosal ridge approach ((Lin H, Zhao G. A comparative anatomic study of a modified temporal-occipital transtentorial transpetrosal-ridge approach and a transpetrosal presigmoid approach. World Neurosurg. 2011 Mar-Apr;75(3-4):495-502. doi: 10.1016/j.wneu.2010.11.009. PubMed PMID: 21600503.)).