Skull Foramina

Question 1

Incisive

Answer 1

• Palantine Process of maxilla

- Nasopalatine nerve, brances of descending palatine vessels

Question 2

Greater palatine

Answer 2

• palatine bone

- greater palatine nerve, descending palatine vessels

Question 3

Lesser palatine

Answer 3

• palatine bone

- lesser palatine neurovascular bundle

Question 4

Pterygoid canal

Answer 4

• sphenoid bone

- nerve of pterygoid canal

Question 5

Ovale

Answer 5

• sphenoid bone, middle fossa

- mandibular nerve (CNV3)

Question 6

Spinosum

Answer 6

• spenoid bone, middle fossa

- middle meningeal artery

Question 7

Petrotympanic fissure

Answer 7

• spenoid and temporal bones

- Corda tympani

Question 8

Lacerum

Answer 8

• Sphenoid, temporal and occipital

- cartilage

Question 9

stylomastoid

Answer 9

• temporal

- facial nerve (CN VII)

Question 10

Carotid Canal

Answer 10

• Temporal bone, middle fossa

- internal carotid artery and plexus

Question 11

Inferior tympanic canaliculul

Answer 11

• temporal

- tympanic branch of glosspharyngeal nerve (CN IX)

Question 12

Mastoid canaliculus

Answer 12

• temporal

- auricular branch of vagus nerve (CN X)

Question 13

Jugular

Answer 13

• temporal and occipital, posterior fossa
• jugular vein posterolaterally; glossoparyngeal nerve (CN IX); vagus nerve (CN X); and accessory nerve (CN XI) anteromedially

Question 14

Hypoglossal canal

Answer 14

• occipital bone, posterior fossa

- hypoglossal nerve (CN XII)

Question 15

Condyloid

Answer 15

• occipital

- Emissary vein

Question 16

Cribriform plate

Answer 16

• anterior fossa

- olfactory nerve fibers

Question 17

anterior ethmoid

Answer 17

• anterior fossa

- anterior ethmoid neurovascular bundle

Question 18

posterior ethmoid

Answer 18

• anterior fossa

- posterior ethmoid neurovascular bundle

Question 19

foramen cecum

Answer 19

• anterior fossa

- origin of superior sagittal venus sinus

Question 20

Optic Canal

Answer 20

• middle fossa

- optic nerve and opthalmic artery

Question 21

superior orbital fissure

Answer 21

• middle fossa
• sphenoid bone
• oculomotor (CN III), trochlear (CN IV), abducent (CN VI), and opthalmic (CN V1) nerves; sympathetic fibers; superior ophthalmic vein

Question 22

Foramen Rotundum

Answer 22

• middle fossa

- Maxillary nerve (CN V2)

Question 23

hiatus for greater petrosal nerve

Answer 23

• middle fossa

- greater petrosal nerve

Question 24

foramen magnum

Answer 24

• posteior fossa

- spinal cord, accessory nerve (CN XI), vertebral artery, anterior and posterior spinal arteries

Question 25

Internal acoustic meatus

Answer 25

• posterior fossa

- fascial (CN VII) and vstibulocochlear (CN VIII) nerves; labyrinthine artery

Question 26

Anterior Cranial Fossa

Answer 26

• Foramen cecum: emissary veins to nasal cavity
• olfactory foramina in cribriform plate: olfactory nerves (I)
• optic canal: optic nerve (II); opthalmic artery

Question 27

MIddle Crainial Fossa

Answer 27

• Superior Orbital Fissure-occulomotor (III), trochlear (IV), opthalmic division of trigeminial (V1), abducent (VI); opthalmic veins
• Formamen Rotundum: maxillary part of trigeminal (V2)
• Formamen ovale: mandibular of trigem (V3); lesser petrosal nerve
• Foramen spinosum: middle meningeal a
• hiatus for the greater petrosal nerve: what it says on the tin
• hiatus for the lesser petrosal nerve: les pet nerve

Question 28

Posterior cranial fossa

Answer 28

• foramen magnum: end of brianstem/beginning of spinal cord; vertebral arteries; spinal roots of accessory nerve; meninges
• internal acoustic meatus: fascial nerve (VII), vestibulocochlear (VIII); labyrintine a
• jugular foramen: jugular vein posterolaterally (sigmoid sinus); glossoparyngeal nerve (CN IX); vagus nerve (CN X); and accessory nerve (CN XI) anteromedially
• hypoglossal canal: hypoglossal nerve XII; meningeal br of ascending pharyngeal artery
• Condylar canal: emissary vein