1 skull, Tm joint Flashcards Preview

MD4001 Anatomy > 1 skull, Tm joint > Flashcards

Flashcards in 1 skull, Tm joint Deck (36)
1

what are the two components of the neurocranium

calvaria and cranial base

2

what is the viscerocranium

anterior part of the cranium

3

what bones contribute to the orbital margin

frontal
zygomatic
maxilla

4

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

supra orbital, infra orbital, mental

5

what bones form the calvaria

2 x parietal
frontal
occipital

6

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

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

7

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

lambda
along the lambdoid suture line

8

what bone is the mastoid a part of

temporal

9

how many fontanelles do babies have

2

10

when does the frontal fontanelle disappear by

18 months

11

what type of joint is found between bones of the calvaria

fibrous sutures

12

what bones form the anterior cranial fossa

frontal
ethmoid
lesser wings of sphenoid bone

13

what bone is the crista gali and cribriform plate found in

ethmoid

14

what does clinoid process mean

bed post

15

where is the pituritary gland found

hypophysial fossa

16

what is the dorsum sellae

back of saddle

17

what is the name for the front of the sadle

tuburculum sellae

18

turkish saddle

sella turcica

19

what bones makes up the nasal septum

vomer

20

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

superior and inferior temporal lines

21

what is the temporal fossa

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

22

what forms the floor of the temporal fossa

pterion

23

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

greater wing

24

why can fracture of the pterion be life threatening

thin bones
overlie the middle meningeal artery

haematoma exerts pressure on the cerebral cortex

25

where is the sphenoidal sinus

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

26

describe the TMJ

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

27

what type of joint is the TMJ

modified synovial

28

what ligament is the primary passive support of the mandible

spenomandibular

29

what is the intrinsic ligament

thickened part of capsule

lateral ligament strengthens the joint laterally

30

what structures prevent posterior disclocation

postglenoid tubercle

lateral ligament

31

what are the two extrinsic ligament of the TMJ

sphenomandibular

stylomandibular

32

what movements occur in the superior cavity

gliding

33

what movements occur in the inferior cavity

hinge and rotational

34

what are the boundaries of the infratemporal fossa

• 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.

35

what are the boundaries of the pterygopalatine fossa

• 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

36

why is the TMJ an atypical synovial joint

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