Objective To supply the far lateral transcondylar approach with some basic microsurgical anatomy and to protect vital structure.Method We examined 10 cadveric adult heads and 10 dry skulls.Results Mastoid process, jugular fossa, and occipital condyle were important signs.Inferior occipital triangle was formed by muscle rectus capitis posterior major, muscle oblique capitis superior, and muscle oblique capitus inferior, the important mark for distinguishing vertebral artery. Abdundant venous plexus ...