Bony landmarks and their contents

Question 1

What runs through the optic canal?

Answer 1

optic n.

opthalamic a.

Question 2

What runs through the superior orbital fissure?

Answer 2

CN: III, IV, VI
V1 branches: lacrimal, frontal, nasociliary n.
superior ophthalmic v
inferior ophthalmic v

Question 3

The nasopalatine n. runs through what foramen?

Answer 3

incisive

Question 4

What runs through the inferior orbital fissure?

Answer 4

zygomatic n. 
infraorbital n (V2)
orbital branch of pterygopalatine ganglion 
inferior ophthalmic v. 
infraorbital a & v

Question 5

What runs through the foramen ovale?

Answer 5

accessory meningeal a
mandibular n (V3)
lesser petrosal n

Question 6

What runs through the foramen spinosum?

Answer 6

MMA

meningeal branch of V3

Question 7

What runs through the foramen lacerum?

Answer 7

ICA

a. & n. of pterygoid canal

Question 8

What cavities does the facial n. run through?

Answer 8

internal acoustic meatus

stylomastoid foramen

Question 9

The inferior petrosal sinus and sigmoid sinus run through what foramen?

Answer 9

jugular foramen

Question 10

The foramen magnum houses what structures?

Answer 10

ant/post spinal a.
vertebral a
medulla oblongata

Question 11

What structure does the chords tympani run through?

Answer 11

petrotympanic fissure

Question 12

What does the infra temporal fossa communicate with?

Answer 12

Foramen ovale
Foramen spinosum
Pterygomaxillary fissure
IOF

Question 13

What does the pterygopalatine fossa communicate with?

Answer 13

sphenopalatine foramen (to nasal cavity)
IOF
F. rotundum
Pterygoid canal 
Pharyngeal canal (nasopharynx)
Palatine canal 
Pterygomaxillary fissure

Question 14

Structures in the cavernous sinus

Answer 14

inf/sup ophthalamic v 
inf/sup petrosal 
pterygoid plexus 
CN III, IV, V1, V2, VI
ICA

Question 15

What bones make up the orbit?

Answer 15

frontal 
maxilla
zygoma 
ethmoid 
sphenoid 
lacrimal 
palatine

Question 16

Location/Opening: sphenoethmoidal recess

Answer 16

Location: sup. to sup. conchae
Opening: sphenoid sinus

Question 17

Location/Opening: superior meatus

Answer 17

Location: below sup. conchae
Opening: post ethmoid air cells

Question 18

Location/Opening: middle meatus

Answer 18

Location: below middle conchae
Opening: frontal sinus, maxillary sinus, ant. ethmoid air cells
Structure: ethmoid bulla, hiatus semilunares, infundibulum

Question 19

Location/Opening: inferior meatus

Answer 19

Location: below inf. conchae
Opening: nasolacrimal duct

Question 20

Frontal paranasal sinus

Answer 20

n: V1
a: opthalamic
drainage: middle meatus, hiatus semilunaris

Question 21

Ethmoid paranasal sinus

Answer 21

n: V1
a: opthalamic
drainage:
ant = middle meatus
middle = ethmoidal bullae
post = superior meatus

Question 22

Sphenoidal paranasal sinus

Answer 22

n: V1, V2
a: ICA
drainage: sphenoethmoidal recess

Question 23

Maxillary paranasal sinus

Answer 23

n: V2
a: maxillary (PSA, MSA, ASA)
drainage: middle meatus, ostium

Question 24

What does the carotid sheath contain?

Answer 24

CCA
IJV
CN X
Deep cervical nodes

Question 25

What sinus drains directly into the IJV?

Answer 25

Sigmoid