Lecture 3 Foramina based on their location in bones and fossae

Foramen: Cribriform foramina in cribriform plate

name the cranial fossa (location) and cranial bone (corresponding bone)

anterior cranial fossa, ethmoid bone

Foramen: optic canal

name the cranial fossa (location) and cranial bone (corresponding bone)

middle cranial fossa, sphenoid bone

Foramen: superior orbital fissure

name the cranial fossa (location) and cranial bone (corresponding bone)

middle cranial fossa, sphenoid bone

Foramen: foramen rotundum

name the cranial fossa (location) and cranial bone (corresponding bone)

middle cranial fossa, sphenoid bone

Foramen: foramen ovale

name the cranial fossa (location) and cranial bone (corresponding bone)

middle cranial fossa, sphenoid bone

Foramen: foramen spinosum

name the cranial fossa (location) and cranial bone (corresponding bone)

middle cranial fossa, sphenoid bone

Foramen: internal acoustic meatus

name the cranial fossa (location) and cranial bone (corresponding bone)

posterior cranial fossa, petrous part of temporal bone

Foramen: jugular foramen

name the cranial fossa (location) and cranial bone (2) (corresponding bone)

posterior cranial fossa; anterior aspect: petrous portion of the temporal bone, posterior: occipital bone

Foramen: hypoglossal canal

name the cranial fossa (location) and cranial bone (corresponding bone)

posterior cranial fossa, occipital bone

Foramen: foramen magnum

name the cranial fossa (location) and cranial bone (corresponding bone)

posterior cranial fossa, occipital bone

what structures were conducted in the cribriform foramina in cribriform plate? (2)

olfactory nerve (CN I) and anterior ethmodial nerves

what structures were conducted in the optic canal? (2)

optic nerve (CN II) and ophthalmic artery

what structures were conducted in the superior orbital fissure? (9)

• Lacrimal nerve

• Frontal nerve- branch of ophthalmic nerve of trigeminal nerve (CN V)

• Superior ophthalmic vein

• Trochlear nerve (CN IV)

• Superior division of the oculomotor nerve (CN III)

• Nasociliary nerve- branch of ophthalmic nerve (CN V1)

• Inferior division of the oculomotor nerve (CN III)

• Abducens nerve (CN VI)

• A branch of the Inferior ophthalmic vein

what structures were conducted in the foramen rotundum? (1)

maxillary branch of trigeminal nerve (CN V2)

what structures were conducted in the foramen ovale? (1)

mandibular brach of trigeminal nerve (CN V3)

what structures were conducted in the foramen spinosum? (3)

middle meningeal artery, middle meningeal vein, meningeal branch of CN V

what structures were conducted in the internal acoustic meatus? (4)

facial nerve (CN VII), vestibulocochlear nerve (CN VIII), vestibular ganglioin, labyrinthine artery

what structures were conducted in the jugular foramen? (5)

• Glossopharyngeal nerve (CN IX)

• Vagus nerve (CN X)

• Accessory nerve (CN XI)

• Jugular bulb

• Inferior petrosal and sigmoidsinuses

what structures were conducted in the hypoglossal canal? (1)

hypoglossal nerve (CN XII)

what structures were conducted in the foramen magnum? (5)

• Vertebral arteries

• Medulla and meninges

• CN XI (spinal division)

• Dural veins

• Anterior and posterior spinal arteries