Cavernous Sinus AnatomyVersion en ligne Anatomy of the Cavernous Sinus. It is a space filled with venous blood. Several important structures pass through this area. This includes the internal carotid artery, and four cranial nerves. (CN III, CN IV, CNVI, and ophthalmic (V1) and maxillary (V2) branches of CN V. par Atticus Baker 1 Hypophysis (Pituitatry Gland) 2 Optic Chiasm 3 Oculomotor Nerve (CNII) 4 Trochlear Nerve (CNIV) 5 Abducens Nerve (CNVI) 6 Ophthalmic Nerve (CNVI) 7 Maxillary Nerve (CNV2) 8 Sphenoid Sinus 9 Sphenoid Bones 10 Nasopharynx 11 Internal Carotid Artery 12 Sympathetic Nerve 13 Sella Turcica 14 Cavernous Sinus