Cranial Foramina Flashcards
What structures are conducted in the cribriform foramina in the cribriform plate?
Olfactory nerve (CN I) Anterior ethmoidal nerves
Which cranial fossa is the cribriform foramina in?
Anterior cranial fossa
Which cranial bone is the cribriform foramina bounded by?
Ethmoid bone
What structures are conducted by the optic canal?
Optic nerve (CN II) Ophthalmic artery
Which cranial fossa is the optic canal in?
Middle cranial fossa
Which cranial bone is the optic canal bounded by?
Sphenoid bone
What structures are conducted by the superior orbital fissure? (9)
Lacrimal nerve Frontal nerve (branch of CN V1) Superior ophthalmic vein Trochlear nerve (CN IV) Superior division of the oculomotor nerve (CN III) Nasociliary nerve (branch of CN VI) Inferior division of oculomotor nerve (CN III) Abducens nerve (CN VI) Branch of the inferior ophthalmic vein
Which cranial fossa is the superior orbital fissure in?
Middle cranial fossa
Which cranial bone is the superior orbital fissure bounded by?
Sphenoid bone
What structure is conducted by the foramen rotundum?
Maxillary branch of trigeminal nerve (CN V)
Which cranial fossa is the foramen rotundum in?
Middle cranial fossa
Which cranial bone is the foramen rotundum bounded by?
Sphenoid bone
What structure is conducted by the foramen ovale?
Mandibular branch of trigeminal nerve (CN V)
Which cranial fossa is the foramen ovale in?
Middle cranial fossa
Which cranial bone is the foramen ovale bounded by?
Sphenoid bone
What structures are conducted by the foramen spinosum?
Middle meningeal artery
Middle meningeal vein
Meningeal branch of CN V3
Which cranial fossa is the foramen spinosum in?
Middle cranial fossa
Which cranial bone is the foramen spinosum bounded by?
Sphenoid bone
What structures are conducted by the internal acoustic meatus?
Facial nerve (CN VII) Vestibulocochlear nerve (CN VIII) Vestibular ganglion Labyrinthine artery
Which cranial fossa is the internal acoustic meatus in?
Middle cranial fossa
Which cranial bone is the internal acoustic meatus bounded by?
Petrous part of temporal bone
What structures are conducted by the jugular foramen?
Glossopharyngeal nerve (CN IX) Vagus nerve (CN X) Accessory nerve (CN XI) Jugular bulb Inferior petrosal and sigmoid sinuses
Which cranial fossa is the jugular foramen in?
Posterior cranial fossa
Which cranial bones is the jugular foramen bounded by? (anterior and posterior)
Anterior aspect: petrous portion of the temporal
Posterior aspect: occipital bone
What structure is conducted by the hypoglossal canal?
Hypoglossal nerve (CN XII)
Which cranial fossa is the hypoglossal canal in?
Posterior cranial fossa
Which cranial bone is the hypoglossal canal bounded by?
Occipital bone
What structures are conducted by the foramen magnum?
Vertebral arteries Medulla and meninges CN XI (spinal division) Dural veins Anterior and posterior spinal arteries
Which cranial fossa is the foramen magnum in?
Posterior cranial fossa
Which cranial bone is the foramen magnum bounded by?
Occipital bone
