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What enters & exits cranial cavities

Foramen ovale Mandibular branch (V3) or trigeminal (CN5) Lesser superficial petrosal nerve (CN9)
Foramen spinosum Middle menigial artery
Pterygomaxillary fissure Descending palatine a.
Pterygopalatine fossa Descending palatine a.
Sphenopalatine foramen Sphenopalatine a.
Foramen rotundum Maxillary branch (V2) of trigeminal (CN5)
Sella turnica Fossa for pituitary gland
Stylodmastoid foramen Facial n. (CN7)
Jugular foramen (7) Inferior petrosal sinus Sigmoid sinus Jugular bulb Internal jugular vein Glossopharyngeal, vagus, accessory nn. (CN9,10,11)
Carotid canal Internal carotid artery and plexus
Petrotympanic fissure Auriculotemporal n. (branch of maxillary (V3) of trigeminal (CN5)
Musculotubal canal Eustatian tube
Internal auditory meatus (3) Facial n. (CN7) Auditory n. (CN8) Labyrinthine a.
Cribiform plate Olfactory n. (CN1)
Foramen magnum (4) Border between spine & brain stem Spinal cord Cervical part of CN11 Vertebral a. Vertebral venous plexus
Condylar canals Emissary vein from sigmoid sinus to vertebral veins in neck
Hypoglossal canal Hypoglossal n. (CN12)
Foramen lacerum Carotid artery crosses close by, usually filled with cartilage in situ
Supraorbital foramen Supraorbital n. & a.
Optic canal (2) Optic n. Opthamilic artery
Superior orbital fissure (5) Opthalmic v. (superior) Oculomotor n. (CN3) Trochlear n. (CN4) Ophthalmic n. (CN5-1) Abducens n. (CN6)
Inferior orbital fissure Inferior opthalmic vv.
Infraorbital foramen/canal Infraorbital n.
Mandibular foramen Enterance: Inferior alveolar n. (CN5)
Mental foramen Exit: Mental n.
Greater & lesser foramina Greater & lesser palatine arteries
Incisive foramen Anastamosis between posterior septal branch of sphenopalatine artery & greater palatine a.
Zygomaticotemporal foramen Maxillary artery lies deep to these
Created by: Rungladwin