Neurocranium and Basicranium Part 3

Question 1

ethmoid labyrinths contain ____

Answer 1

ethmoid air cells

Question 2

falx cerebri attaches to _____ and to ____

Answer 2

crista galli ; frontal crest

Question 3

anterior border of crista galli forms two alae, which forms _____

Answer 3

foramen cecum

Question 4

cribriform plate fits into ______ of frontal bone

Answer 4

ethmoid notch

Question 5

ethmoid bone forms roof of ______

Answer 5

nasal cavity

Question 6

branches of _____ goes through openings of cribriform plate

Answer 6

olfactory nerves

Question 7

the lateral side of the ethmoidal labyrinth is the _____ which forms the medial wall of the _____

Answer 7

orbital plate or lamina papyracea; orbit

Question 8

true or false; Labyrinth is roofed superiorly by medial

part of pars orbitalis of frontal bone

Answer 8

true

Question 9

chonchae may also be known as

Answer 9

turbinates

Question 10

Temporal bone is in 3 parts at birth.

Answer 10

1. ) squamous
2. ) petrous
3. ) tympanic

Question 11

inner and middle ear are in ____ part of temporal bone

Answer 11

petrous

Question 12

Temporal bones act as transitional bones between ______ and ________ of skull

Answer 12

base; calvarium

Question 13

external opening of ear canal

Answer 13

external auditory meatus

Question 14

TMJ is a _____ joint

Answer 14

complex

Question 15

what 2 bones make the TMJ?

Answer 15

mandibular fossa articulates with head of mandible

Question 16

Mandibular fossa is anteriorly delimited by____________(tubercle), and medially delimited by ___________

Answer 16

articular eminence; entoglenoid process

Question 17

Mandibular fossa is separated posteriorly from external auditory meatus by __________

Answer 17

postglenoid tubercle

Question 18

what is medial to styloid process?

Answer 18

jugular fossa

Question 19

Tympanic plate divides inferiorly to form vaginal process around base of styloid process for ___________

Answer 19

stylomandibular ligament

Question 20

what ligaments insert on mandible to stabilize it? Where do these ligaments come from?

Answer 20

Stylomandibular ligament from styloid process of temporal and sphenomandibular ligament from sphenoidal spine insert on, and stabilize, mandible

Question 21

posterior petrous part has the ____ bone

Answer 21

mastoid

Question 22

otic capsule contains _____ and _____

Answer 22

cochlea and semicircular canals

Question 23

sagittal projection above horizontal cribriform plate is ____ ____, part below is ____ or ______ plate

Answer 23

crista galli; vertical; perpendicular

Question 24

cribriform plate fits into _____ _____ of ______ _____ frontal bone

Answer 24

ethmoidal notch ; pars orbitalis

Question 25

true or false; the cribriform plate forms part of the roof of nasal cavity and floor of anterior cranial fossa

Answer 25

true

Question 26

true or false; the labyrinth is roofed superiorly by medial part of pars orbitalis as well as by sphenoid posteriorly

Answer 26

true

Question 27

true or false; superior and middle conchae arise from lateral labyrinth surface

Answer 27

false; medial labyrinth surface

Question 28

true or false; the inner ear is for hearing and balance and the middle ear is for balance

Answer 28

false; the inner ear is for hearing and balance and the middle ear is for hearing

Question 29

where is the inner and middle ear located?

Answer 29

contained within petrous part of temporal

Question 30

temporal bones act as transitional bones between ____ and _____ of skull

Answer 30

base; calvarium

Question 31

true or false; the otic capsule is the collective name for skeletal elements enclosing middle ear mechanisms

Answer 31

false; inner ear mechanisms such as cochlea (hearing) and semicircular canal (balance)

Question 32

tympanic cavity contains _____ _____ and _____, or ossicular chain or auditory ossicles

Answer 32

malleus, incus, and stapes

Question 33

the squamous part of the temporal bone is grooved on medial surface by _____ _____ ______

Answer 33

middle meningeal artery

Question 34

mandibular fossa on inferior surface articulates with mandibular condyle (or head of mandible) to form _______ _____, a complex joint

Answer 34

temporomandibular joint

Question 35

anterior boundary of mandibular fossa =

Answer 35

articular eminence

Question 36

middle boundary of mandibular fossa =

Answer 36

entoglenoid process

Question 37

posterior boundary of mandibular fossa =

Answer 37

postglenoid tubercle

Question 38

the relaxed, centralized position of the mandibular condyle within the mandibular fossa is called _____ _____

Answer 38

centric relation

Question 39

parietal notch of temporal bone articulates with ____ _____ of parietal bone

Answer 39

mastoid angle

Question 40

_______ crest is superior to external auditory meatus; ______ crest is posterior continuation above mastoid

Answer 40

suprameatal; supramastoid

Question 41

true or false; tympanic portion is ring shaped at birth

Answer 41

true

Question 42

tympanic part extends anteroinferiorly as ____ ____ which forms part of posterior wall of ______ _____

Answer 42

tympanic plate; mandibular fossa

Question 43

tympanic plate divides inferiorly to form vaginal process around styloid process for _______ ligament

Answer 43

stylomandibular

Question 44

______ fossa is medial to styloid process

Answer 44

jugular

Question 45

_____ notch is medial to mandibular process and ____ groove is medial to mastoid notch

Answer 45

mastoid; occipital