Skull Foramina

Question 1

hypoglossal canal

Answer 1

CN XII (hypoglossal) exits

Question 2

tympano-occipital fissure

Answer 2

CN IX (glossopharyngeal), CN X (vagus), and CN XI (accessory) exit through

Question 3

tentorial process

Answer 3

tent for cerebellum

Question 4

Internal acoustic meatus

Answer 4

CN VII (facial) and CN VIII (vestibularcochlear) enters through

Question 5

Jugular foramen

Answer 5

CN IX (glossopharyngeal), CN X (vagus), and CN XI (accessory) enter through

Question 6

stylomastoid foramen

Answer 6

CN VII (facial) exits through

Question 7

external acoustic meatus

Answer 7

short bony canal where tympanic membrane attached
landmark between middle and external ear

Question 8

tympanic bulla

Answer 8

air filled bony cavity
form tympanic cavity of middle ear, where 3 small ossicles live

Question 9

orbital fissure

Answer 9

CN III (oculomotor), CN IV (trochlear), CN VI (abducens), and CN V branch 1 (ophthalmic) pass through

Question 10

round foramen

Answer 10

CN V (trigeminal) second branch (maxillary) pass through

Question 11

oval foramen

Answer 11

CN V (trigeminal) third branch (mandibular) pass through

Question 12

hypophyseal fossa

Answer 12

fossa for hypophysis, in the middle of sella turcica

Question 13

dorsum sellae

Answer 13

most caudal bony prominence of sella turcica

Question 14

optic canal

Answer 14

CN II (optic n) passes through

Question 15

chiasmatic groove

Answer 15

bony groove for the nervous structure optic chiasm (where optic nerves cross over)

Question 16

cribiform plate

Answer 16

bony wall between cranial and nasal cavities
CN I (olfactory) goes through

Question 17

ethmodial labyrinth

Answer 17

projected from cribiform to nasal cavity and frontal sinus

Question 18

perpendicular plate

Answer 18

vertical bone projected from cribiform
-forms bony portion of septum

Question 19

infraorbital foramen

Answer 19

CN V (trigeminal) branch 2 (maxillary) exits through
rostral opening of infraorbital canal

Question 20

maxillary forament

Answer 20

CN V (trigeminal) branch 2 (maxillary) passes through
caudal opening of infraorbital canal

Question 21

infraorbital canal

Answer 21

bony canal between maxillary foramen and infraorbital foramen

Question 22

sphenopalatine foramen

Answer 22

have branches of CN V (trigeminal) branch 2 (maxillary)
goes toward nasal cavity

Question 23

caudal palatine foramen

Answer 23

have branches of CN V (trigeminal) branch 2 (maxillary)
goes toward hard palette

Question 24

mandibular foramen

Answer 24

caudal opening of mandibular canal
branch of CN V (trigeminal) branch 3 (mandibular) passes through

Question 25

mental foramen

Answer 25

rostral opening of mandibular canal branches of CN V (trigeminal) branch 3 (mandibular)