<prompt> All of the following are contents of sub-occipital triangle, exceptVeebral aeryDorsal ramus of C1 nerveSuboccipital plexus of veinOccipital aery  <response>: CONTENTS OF SUBOCCIPITAL TRIANGLE: Third pa of veebral aery Dorsal ramus of nerve C1-suboccipital nerve Suboccipital plexus of veins NOTES: SUBOCCIPITAL MUSCLES- Rectus capitis posterior major Rectus capitis posterior minor Obliquus capitis superior Obliquus capitis inferior Ref BDC volume 3,sixth edition pg 179 