1 skull, Tm joint

Question 1

what are the two components of the neurocranium

Answer 1

calvaria and cranial base

Question 2

what is the viscerocranium

Answer 2

anterior part of the cranium

Question 3

what bones contribute to the orbital margin

Answer 3

frontal
zygomatic
maxilla

Question 4

what are the 3 foramen for the divisions of cranial nerve 5

Answer 4

supra orbital, infra orbital, mental

Question 5

what bones form the calvaria

Answer 5

2 x parietal
frontal
occipital

Question 6

what is the anterior meeting point of the frontal and parietal bones called

Answer 6

bregma, intersection of the coronal suture line and sagittal suture line

Question 7

what is the name for where the parietal bone meet the occipital bone

Answer 7

lambda

along the lambdoid suture line

Question 8

what bone is the mastoid a part of

Answer 8

temporal

Question 9

how many fontanelles do babies have

Answer 9

2

Question 10

when does the frontal fontanelle disappear by

Answer 10

18 months

Question 11

what type of joint is found between bones of the calvaria

Answer 11

fibrous sutures

Question 12

what bones form the anterior cranial fossa

Answer 12

frontal
ethmoid
lesser wings of sphenoid bone

Question 13

what bone is the crista gali and cribriform plate found in

Answer 13

ethmoid

Question 14

what does clinoid process mean

Answer 14

bed post

Question 15

where is the pituritary gland found

Answer 15

hypophysial fossa

Question 16

what is the dorsum sellae

Answer 16

back of saddle

Question 17

what is the name for the front of the sadle

Answer 17

tuburculum sellae

Question 18

turkish saddle

Answer 18

sella turcica

Question 19

what bones makes up the nasal septum

Answer 19

vomer

Question 20

what lines can be seen on the lateral aspect of the cranium

Answer 20

superior and inferior temporal lines

Question 21

what is the temporal fossa

Answer 21

found on the lateral aspect of the cranium

bounded by the superior temporal line, frontal process of zygomatic bone, zygomatic process of frontal bone, infratemporal crest, pterion

Question 22

what forms the floor of the temporal fossa

Answer 22

pterion

Question 23

what part of the spenoid bone is seen on the lateral cranium

Answer 23

greater wing

Question 24

why can fracture of the pterion be life threatening

Answer 24

thin bones
overlie the middle meningeal artery

haematoma exerts pressure on the cerebral cortex

Question 25

where is the sphenoidal sinus

Answer 25

just below the pituitary gland, at the back of the nasal cavity

Question 26

describe the TMJ

Answer 26

condylar process articulates with the temporal bone within the mandibular fossa at the TMJ superior and inferior articular cavities separated by the articular disc, attached to the internal aspect of the joint capsule

Question 27

what type of joint is the TMJ

Answer 27

modified synovial

Question 28

what ligament is the primary passive support of the mandible

Answer 28

spenomandibular

Question 29

what is the intrinsic ligament

Answer 29

thickened part of capsule lateral ligament strengthens the joint laterally

Question 30

what structures prevent posterior disclocation

Answer 30

postglenoid tubercle lateral ligament

Question 31

what are the two extrinsic ligament of the TMJ

Answer 31

sphenomandibular stylomandibular

Question 32

what movements occur in the superior cavity

Answer 32

gliding

Question 33

what movements occur in the inferior cavity

Answer 33

hinge and rotational

Question 34

what are the boundaries of the infratemporal fossa

Answer 34

``` • Lateral: Ramus of mandible • Medial: Lateral pterygoid plate • Anterior: posterior aspect maxilla • Posterior: Tympanic plate/mastoid and styloid process • Superior: Infratemporal crest of sphenoid • Inferior: Angle of mandible. ```

Question 35

what are the boundaries of the pterygopalatine fossa

Answer 35

``` • Superior: apex of orbit • Posterior: Lateral Pterygoid plate • Anterior: posterior aspect of maxilla • Medial: perpendicular plate of palatine bone • Lateral: infratemporal fossa • Incomplete roof: infratemporal surface of greater wing of sphenoid • Floor: pyramidal process of palatine bone ```

Question 36

why is the TMJ an atypical synovial joint

Answer 36

it is not made of hyaline cartilage its made of fibrocartilage it contains an intraarticular disk