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AS II - Final Exam > TMJ > Flashcards

Flashcards in TMJ Deck (41)
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1

What type of joint is the TMJ?

modified hinge

2

Label

Anteriorly is articular tubercle

posteriorly is post glenoid tubercle

3

label

anteriorly is articular aminence

middle is articular tubercle

posteriorly is post glenoid tubercle

4

Borders of mandibular fossa

Lateral: zygomatic process of temporal bone

Medial: spine of sphenoid bone

Anterior: articular eminence

Posterior: squamotympanic and petrotypanic fissures

5

what passes through petrotympanic fissure?

chorda tympani

6

What's more medial: squamotympanic fissure or petrotympanic fissure?

pertrotympanic fissure is the more medial half

7

How are the condyles of the mandible formed?

intramembranous ossification

8

What attaches to external oblique line?

depressor anguli oris

9

What is found on each side (laterally) of the mental spine of the interior mandible?

digastric fossae

10

What attaches to the digastric fossae?

origin of the anterior belly of the digastric

11

What attaches to the mental spine?

genioglossus muscle attaches to superior aspect of mental spine

geniohyoid attaches to lower aspect

12

What passes through mandibular canal?

inferior alveolar nerve and artery

13

what passes through mental foramen?

cutaneous branches of inferior alveolar nerve and artery

14

What attaches to the lingula?

sphenomandibular ligament

15

what runs along mylohyoid sulcus/groove and where is it located?

runs downward and forward from inferior border of mandibular foramen

nerve to mylohyoid muscle runs along it

16

What's the shape of the articualr disc?

biconcave

17

Where are superior and inferior lamellae found?

inner periphery of articulator capsule

18

primary composition of superior and inferior lamellae

Superior is ELASTIC

inferior is COLLAGEN

19

two regions of joint capsule of TMJ

capsular ligament and lateral/temporomandibular ligament

20

what does the capsular ligament prevent?

excessive lateral movement and posterior dislocation

21

what does lateral/temporomandibular ligament prevent?

excessive lateral movement and posterior dislocation

22

attachments of stylomandibular ligament

styloid process to angle of mandible

23

function of stylomandibular ligament

limits protrusion

24

sphenomandibular attachments

from spine of sphenoid to lingula of mandible

25

function of sphenomandibular ligament

supports weight of mandible

prevents excessive lateral movement of mandible

26

fulcrum of elevation and depression of the mandible

approx. at mandiblar foramen

27

Locations of hinge movement and gliding at TMJ

hinge at lower joint compartment

gliding/translation at upper joint compartment

28

attachments of temporalis muscle

temporal fossa

tip of coronoid process, ramus of mandible

29

action of temporalis muscle

elevation, retrusion of mandible (bilaterally)

also holds resting position of mandible

30

innervation of temporalis muscle

deep temporal branches