Skull Base Flashcards
The adult skull base consist of what bones?
Consist of five bones:
Unpaired = Ethmoid, sphenoid, and occipital bones
Paired = Temporal and frontal bones
What bone forms the floor of the posterior fossa?
Occipital bone
What are important occipital bone apertures?
Foramen magnum
Posterior condylar canal
Hypoglossal canal
What are important temporal bone apertures?
Jugular foramen Facial nerve canal Internal auditory canal Eustachian tube Petrous carotid canal
What are important apertures of the sphenoid bone?
Foramen ovale Foramen spinosum Foramen rotundum Optic canal Superior orbital fissure Precaverneous carotid canal Foramen lacerum
Name the structures pass through the optic canal.
Optic nerve
Ophthalmic artery
Subarachnoid space, cerebrospinal fluid, dura by optic nerve
Name the structures that pass through the superior orbital fissure
Cranial nerves III, IV, V1, and VI
Superior ophthalmic vein
Name the structures that pass through the foramen rotundum.
Maxillary division of V (V2)
Emissary veins
Artery of foramen rotundum
Name the structures that pass through the foramen ovale.
Mandibular division of V (V3)
Emissary veins from carvernous sinus to pterygoid plexus
Accessory meningeal branch of maxillary artery
Name the structures that pass through the foramen spinosum.
Middle meningeal artery
Recurrent (meningeal artery) branch, mandibular nerve
Name the structures that pass through the foramen lacerum:
Meningeal branches of ascending pharyngeal artery; not internal carotid artery
Nerve that pass through the stylomastoid foramen.
Facial nerve
Name the structures that pass through the foramen magnum:
Medulla and its meninges
Spinal segment of cranial nerve XI
Vertebral arteries and veins
Anterior and posterior spinal arteries
