week 3- cranial base Flashcards
Foramen Cecum
Bone
specific area
nerves & vessels
Bone: ethmoid bone
specific area: anterior to the cribiform plate
nerves & vessels : emissary venous connections
Foramina of CribiformPlate
Bone
specific area
nerves & vessels
Bone: ethmoid bone
specific area:. A horizontal plate of bone forms the superior horizontal border of the ethmoid bone
nerves & vessels: olfactory nerves
Anterior Ethmoidal foramina
Bone
specific area
nerves & vessels
Bone: ethmoid
specific area: along the ethmoidal border of the medial orbital wal
nerves & vessels:the anterior ethmoidal vessels and nerve
Posterior Ethmoidal Foramina
Bone
specific area
nerves & vessels
Bone: Ethmoid
specific area: sits in the suture between the ethmoid bone and frontal bone
nerves & vessels:posterior ethmoidal nerve
Optic canal
Bone
specific area
nerves & vessels
Bone: sphenoid
specific area: at the base of the lesser wings
nerves & vessels: The optic nerve and artery
superior orbital fissure
Bone
specific area
nerves & vessels
Bone: sphenoid bone
specific area: elongated gap between the lesser and greater wings of the sphenoid bone. This fissure opens into the posterosuperior orbit
nerves & vessels: CN II, IV, V1, VI
Foramen Rotundum
Bone
specific area
nerves & vessels
Bone: sphenoid
specific area: floor of the middle cranial fossa at the junction of the body and greater wing of the sphenoid
nerves & vessels: maxillary division of the trigeminal nerve (V2)
Foramen Ovale
Bone
specific area
nerves & vessels
Bone: sphenoid
specific area: posterior part of the greater wing of the sphenoid,
nerves & vessels: Otic ganglion, V3, Accessory meningeal artery, Lesser petrosal nerve, and Emissary veins from pterygoid plexus to cavernous sinus
Foramen spinosum
Bone
specific area
nerves & vessels
Bone: sphenoid
specific area: posterior laterally to the foramen ovale
nerves & vessels: middle meningeal artery along with the meningeal branch of the mandibular nerve
Carotid foramen
Bone
specific area
nerves & vessels
Bone: petrous portion of temporal bone
specific area
nerves & vessels: internal carotid
foramen lacerum
Bone
specific area
nerves & vessels
Bone: temporal
specific area: At the apex of the petrous temporal bone is a gap where temporal bone does not reach the suture formed between the occipital and sphenoid bones, junction of petrous temporal, sphenoid, and occipital bones
nerves & vessels: small emissary vein and very small branches of the ascending pharyngeal artery (carotid artery passes over this)
Internal acoustic meatus
Bone
specific area
nerves & vessels
Bone: temporal bone
specific area: posteromedial aspect of the petrous portion of the temporal bone.
nerves & vessels: vestibulocochlear and facial nerves
Stylomastoid Foramen
Bone
specific area
nerves & vessels
Bone: temporal bone
specific area: petrous portion of temporal bone lateral to the jugular foramen
nerves & vessels: facial nerve
Jugular Foramen
Bone
specific area
nerves & vessels
Bone: temporal
specific area: between the petrous portion of the temporal bone and the occipital bone in the petro-occipital suture inferior to the internal auditory meatus
nerves & vessels:
anterior region- vagus, glossopharyngeal, and accessory nerves, along with the inferior petrosal venous sinus.
posterior region- sigmoid venous sinus as it transitions to the internal jugular vein.
Hypoglossal canal
Bone
specific area
nerves & vessels
Bone: occipital
specific area: superior to the occipital condyles
nerves & vessels: CN XII