Figure 7:

Illustrative Case 2 (Patient 13). (a) Right semi-prone park bench position. (b) Skin incision (blue line) relative to the mastoid tip (arrow) and mastoid groove (arrowhead). (c-h) The steps to expose the third segment of the left vertebral artery are demonstrated, similar to Figure 1-3. The superior oblique (SO, blue color), inferior oblique (IO, green color), and rectus capitis posterior major (RCPM, yellow color) muscles; the third segment of the vertebral artery (V3, red color); and the center of the suboccipital triangle (asterisk) are shown. (I and j) The left far lateral transcondylar fossa approach.