Skull

Question 1

what is significant about the fetal skull?

Answer 1

fontanelles - open sutures, allow bb to pass through birth canal

Question 2

what are the four paranasal sinuses?

Answer 2

frontal
sphenoid
ethmoid
maxillary

Question 3

what are the 3 bones contributing to the medial wall of the orbit

Answer 3

frontal process of maxilla
lacrimal bone
lateral mass of ethmoid bone

Question 4

what are the two bones contributing to the roof of the orbit

Answer 4

lesser wing of sphenoid bone

frontal bone

Question 5

what are the 3 bones contributing to the lateral wall of the orbit

Answer 5

zygomatic process of frontal bone
greater wing of sphenoid bone
orbital surface of zygomatic bone

Question 6

what bones make up the nasal complex?

Answer 6

nasal bone
lacrimal bone
inferior nasal concha
maxilla
horizontal plate of palatine bone
sphenoid bone

Question 7

how is a Le Fort I fracture characterized?

Answer 7

removal of alveolar process of maxilla

loss of upper teeth

Question 8

how is a Le Fort II fracture characterized?

Answer 8

fx of maxilla at zygomatic-maxillary suture

Question 9

how is a Le Fort III fracture characterized?

Answer 9

detachment of all upper face bones from cranium

Question 10

what structure separates the hard palate from anterior nasal spine?

Answer 10

incisive foramen of the maxilla

Question 11

what structure holds the teeth of the upper jaw

Answer 11

alveolar process of the maxilla

Question 12

how does the palatine bone contribute to the orbit?

Answer 12

orbital process of the palatine bone forms the medial floor

Question 13

how does the palatine bone contribute to the nasal cavity?

Answer 13

perpendicular plate forms the lateral wall of the nasal cavity

Question 14

what bone forms the inferior portion of the nasal septum?

Answer 14

vertical plate of the vomer bone

Question 15

what structure passes through the lacrimal groove?

Answer 15

nasolacrimal duct

Question 16

what structures make up the zygomatic arch

Answer 16

zygomatic process of temporal bone

temporal process of zygomatic bone

Question 17

what foramen do the olfactory nerves pass through?

Answer 17

cribiform foramina

Question 18

in what bone is the cribiform foramina found

Answer 18

ethmoid bone

Question 19

what attaches to the crista galli of the ethmoid bone?

Answer 19

falx cerebri

Question 20

what bone forms the superior and middle nasal concha

Answer 20

ethmoid bone

Question 21

what feature of the sphenoid bone forms the posterior wall of the orbit?

Answer 21

superior orbital fissure

Question 22

is the sphenoid bone paired or unpaired?

Answer 22

unpaired but spans across both sides of the skull

Question 23

what three grooves of the occipital bone form the route of the venous drainage for the brain

Answer 23

groove for sigmoid sinus
groove for transverse sinus
groove for superior sagittal sinus

Question 24

what two structures articulate when nodding?

Answer 24

occipital condyles and C1

Question 25

what bone contains the foramen magnum

Answer 25

occipital bone

Question 26

what is the petrous portion of the temporal bone

Answer 26

a thickening of bone which protects the inner ear

Question 27

what bones meet at the coronal suture

Answer 27

frontal and both parietal bones

Question 28

what bones meet at the sagittal suture

Answer 28

both parietal bones

Question 29

what bones meet at the lambdoid suture

Answer 29

parietal and occipital bones

Question 30

what bones meet at the squamous suture

Answer 30

temporal and parietal bones

Question 31

why is it best to leave overlaying tissues on bone flaps of the skull?

Answer 31

the periosteum has little blood supply and takes a long time to heal

Question 32

what nerve arises from the supraorbital foramen

Answer 32

terminal branch of V1