17 - Temporal & Infratemporal Fossae Flashcards Preview

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Flashcards in 17 - Temporal & Infratemporal Fossae Deck (59)
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1

This temporal line is the attachment for the temporalis fascia.

Superior temporal line

2

This temporal line is the attachment for the temporalis muscle.

Inferior temporal line

3

What is the superior and posterior temporal boundary?

Inferior temporal line

4

What is the superior and posterior temporal fossa boundary?

Inferior temporal line

5

What is the anterior temporal fossa boundary?

Frontal process of zygomatic

6

What is the inferior temporal fossa boundary?

Zygomatic arch

7

What is part of the temporal fossa floor?

Greater wing of sphenoid
Squamous temporal
Frontal
Parietal

8

What are the contents of the temporal fossa?

Temporalis muscle
Deep temporal nerve and arteries
Zygomaticofacial nerve

9

What are all muscles of mastication innervated by?

Mandibular branch of CN V (V3)

10

What is the origin of the masseter muscle?

Inferior margin and deep surface of zygomatic bone

11

What is the insertion of the masseter muscle?

Lateral surface of mandibular ramus and coronoid process

12

What actions does the masseter perform?

Elevates and protracts mandible

13

What is the origin of the temporalis muscle?

Floor of temporal fossa and temporal fascia

14

What is the insertion of the temporalis muscle?

Coronoid process and anterior border of mandibular ramus

15

What actions does the temporalis muscle perform?

Elevates and retracts mandible

16

What are the muscles of mastication?

Masseter
Temporalis
Lateral pterygoid
Medial pterygoid

17

What is the origin of the lateral pterygoid?

Lateral pterygoid plate and greater wing of sphenoid

18

What is the insertion of the lateral pterygoid?

Front of neck of mandible, articular disc and TMJ

19

What actions does the lateral pterygoid perform?

Protracts mandible
Depresses chin (bilateral)
Grinding (unilateral)

20

What is the origin of the medial pterygoid?

Lateral pterygoid plate and maxilla

21

What is the insertion of the medial pterygoid?

Medial surface of mandible near angle

22

What actions does the medial pterygoid perform?

Elevates and protracts mandible (bilateral)
Grinding (unilateral)

23

This joint is a synovial joint between the head of the mandible (condyloid process) and mandibular fossa of temporal bone.

Temporomandibular joint

24

There is an intervening fibrocartilage disc that divides the TMJ into superior and inferior compartments. This allows the mandible to do what?

Protract and retract
Elevate and depress

25

In anterior gliding of the mandible, there is protraction and retraction. ________ occurs when protraction and retraction of the mandible alternate on the two sides.

Grinding

26

In a hinge-like rotation during mandibular depression, the head of the mandible and the articular disc move anteriorly until the head lies (SUPERIOR/INFERIOR) to the anterior tubercle.

Inferior

27

This TMJ ligament goes from the base of the zygomatic process to the mandibular neck.

Temporomandibular ligament (TML)

28

This TMJ ligament goes from the styloid process to the angle of the mandible. It runs between the parotid and submandibular glands.

Stylomandibular ligament (SML)

29

This TMJ ligament goes from the sphenoid spine to the mandibular lingula. It lies medial to the TMJ and is a remnant of Meckel's cartilage.

Sphenomandibular ligament

30

What is the anterior boundary of the infratemporal fossa?

Maxilla