connections of the skull

Question 1

cribriform plate

Answer 1

anterior cranial fossa –> common nasal meatus

Question 2

piriform aperture

Answer 2

face –> common nasal meatus

Question 3

incisive canal

Answer 3

oral cavity –> common nasal meatus

Question 4

sphenopalatine foramen

Answer 4

pterygopalatine fossa –> common nasal meatus

Question 5

choana

Answer 5

nasopharynx –> common nasal meatus

Question 6

aperture of sphenoid sinus

Answer 6

sphenoid sinus - common nasal meatus

Question 7

what opens in the superior nasal meatus ?

Answer 7

posterior ethmoidal air cells

Question 8

what opens in the middle nasal meatus?

Answer 8

anterior + middle ethmoidal air cells

Question 9

where is the semilunar hiatus?

Answer 9

between ethmoid bulla –> uncinate process

Question 10

what is connected by the ethmoidal infundibulum?

Answer 10

frontal sinus –> middle nasal meatus

Question 11

aperture of maxillary sinus

Answer 11

maxillary sinus –> middle nasal meatus

Question 12

nasolacrimal canal

Answer 12

orbit –> inferior nasal meatus

Question 13

greater palatine canal

Answer 13

pterygopalatine fossa–>oral cavity

Question 14

lesser palatine canal

Answer 14

pterygopalatine fossa–> oral cavity

Question 15

mandibular canal (from mandibular foramen)

Answer 15

mental foramen –> oral cavity

Question 16

musculotubarian canal

Answer 16

external base of skull –> tympanic cavity

**(semicanal for tensor tympani muscle + semicanal for auditory tube)

Question 17

caroticotympani canaliculi

Answer 17

carotid canal –> tympanic cavity

Question 18

canaliculus of chorda tympani

Answer 18

facial canal ( descending part ) –> tympanic cavity

Question 19

stapedius canaliculi

Answer 19

facial canal ( descending part ) –> tympanic cavity

Question 20

tympanic canaliculus

Answer 20

fossula petrosa –> tympanic cavity

Question 21

cannal of lesser petrosal nerve

Answer 21

middle cranial fossa –> tympanic cavity

Question 22

mastoid antrum

Answer 22

mastoid air cells –> tympanic cavity

Question 23

fenestra vestibuli

Answer 23

inner ear –> tympanic cavity

Question 24

fenestra cochleae

Answer 24

cochlea (inner ear) –> tympanic cavity

Question 25

aditus orbitae

Answer 25

face --> orbit

Question 26

optic canal

Answer 26

middle cranial fossa--> orbit

Question 27

superior orbital fissure

Answer 27

middle cranial fossa --> orbit

Question 28

inferior orbital fissure (postero-medial part)

Answer 28

pterygopalatine fossa --> orbit

Question 29

inferior orbital fissure (antero-lateral part)

Answer 29

infratemporal fossa --> orbit

Question 30

anterior ethmoidal canal

Answer 30

anterior cranial fossa (above cribriform plate) --> orbit

Question 31

posterior ethmoidal canal

Answer 31

orbit --> posterior ethmoidal air cells + sphenoid sinus

Question 32

infra-orbital canal

Answer 32

face, canine fossa --> orbit

Question 33

frontal notch

Answer 33

supraorbital region (forehead) --> orbit

Question 34

supraorbital foramen

Answer 34

supraorbital region --> orbit

Question 35

zygomatic canal (zygomaticoorbital foramen)

Answer 35

orbit --> zygomaticofacial foramen (face) | orbit--> zygomaticotemporal foramen (temporal fossa)

Question 36

foramen rotundum

Answer 36

pterygopalatine fossa--> middle cranial fossa

Question 37

foramen ovale

Answer 37

external base of skull--> middle cranial fossa

Question 38

foramen spinosum

Answer 38

external base of skull--> middle cranial fossa

Question 39

foramen lacerum (filled with cartilage)

Answer 39

external base of skull--> middle cranial fossa

Question 40

carotid canal

Answer 40

external base of skull--> middle cranial fossa

Question 41

hiatus for the canal of the greater petrosal nerve

Answer 41

facial canal --> middle cranial fossa

Question 42

hiatus for the canal of the lesser petrosal nerve

Answer 42

tympanic cavity --> middle cranial fossa

Question 43

petro-squamous fissure

Answer 43

external base of skull ( infratemporal fossa ) --> middle cranial fossa

Question 44

spheno-petrous fissure

Answer 44

external base of skull--> middle cranial fossa

Question 45

foramen magnum

Answer 45

vertebral canal --> posterior cranial fossa

Question 46

internal acoustic meatus (starts with internal acoustic pore)

Answer 46

fundus of internal acoustic meatus -->posterior cranial fossa

Question 47

jugular foramen

Answer 47

external base of skull -->posterior cranial fossa | pars nervosa +pars venosa

Question 48

hypoglossal canal

Answer 48

external base of skull -->posterior cranial fossa

Question 49

condylar canal

Answer 49

external base of skull (condylar fossa) -->posterior cranial fossa (to sigmoid sinus)

Question 50

aquaductus of vestibulae

Answer 50

inner ear --> posterior cranial fossa

Question 51

mastoid foramen

Answer 51

outer aspect of skull --> posterior cranial fossa

Question 52

petrooccipital fissure

Answer 52

external base of skull -->posterior cranial fossa

Question 53

stylo-mastoid foramen

Answer 53

facial canal--> external base of skull

Question 54

pterygoid canal

Answer 54

pterygopalatine fossa --> external base of skull

Question 55

cochlear canaliculi

Answer 55

inner ear --> external base of skull | from medial wall of petrosal fossula

Question 56

tympanic canaliculi

Answer 56

tympanic cavity --> external base of skull | from lateral wall of petrosal fossula

Question 57

mastoid canaliculi

Answer 57

tympanomastoid fissure --> external base of skull | starts from lateral wall of jugular fossa

Question 58

pterygomaxillary fissure

Answer 58

pterygopalatine fossa --> infratemporal fossa

Question 59

petrotympanic fissure

Answer 59

tympanic cavity --> infratemporal fossa

Question 60

alveolar foramina

Answer 60

upper teeth --> infratemporal fossa