Location of Skull Openings

Question 1

optic canal

Answer 1

presphenoid bone

Question 2

orbital fissure

Answer 2

rostral: presphenoid; caudal: basisphenoid

Question 3

alar canal

Answer 3

basisphenoid bone

Question 4

ethmoidal foramina

Answer 4

frontal bone approximately 1 cm rostral to the optic canal

Question 5

caudal palatine foramen

Answer 5

rostromedial wall of pterygopalatine fossa

Question 6

sphenopalatine foramen

Answer 6

rostromedial wall of pterygopalatine fossa

Question 7

maxillary foramen

Answer 7

rostromedial wall of pterygopalatine fossa

Question 8

lacrimal canal (fossa for the lacrimal sac)

Answer 8

lacrimal bone

Question 9

infraorbital foramen

Answer 9

dorsal to 3rd PM tooth on maxilla

Question 10

round foramen

Answer 10

within alar canal

Question 11

oval foramen

Answer 11

caudolateral to caudal alar foramen

Question 12

carotid foramen

Answer 12

rostromedial edge of tympanic bulla

Question 13

musculotubal canal

Answer 13

lateral to carotid foramen, caudal to oval foramen

Question 14

tympano-occipital fissure

Answer 14

between basilar part of the occiptal bone and tympanic part of the temporal bone

Question 15

hypoglossal canal

Answer 15

caudomedial to tympano-occipital fissure in occipital bone

Question 16

retroarticular foramen

Answer 16

caudal to retroarticular process at mandibular fossa

Question 17

stylomastoid foramen

Answer 17

between tympanic bulla and mastoid process of temporal bone

Question 18

major palatine foramen

Answer 18

medial to 4th cheek tooth

Question 19

minor palatine foramen

Answer 19

caudal to major palatine foramen

Question 20

mastoid foramen

Answer 20

in occipitotemporal suture dorsolateral to occipital condyle

Question 21

mandibular foramen

Answer 21

medial ramus of mandible

Question 22

mandibular canal

Answer 22

ramus and body of mandible

Question 23

mental foramina

Answer 23

rostral mandible

Question 24

canal for trigeminal N

Answer 24

rostral end of petrosal part of temporal bone

Question 25

jugular foramen

Answer 25

between petrosal part of temporal and occipital bones

Question 26

foramen for the dorsal sagittal sinus

Answer 26

rostral surface of the occipital bone