Muscles of Mastication (week 2) Flashcards Preview

Head and Neck Anatomy > Muscles of Mastication (week 2) > Flashcards

Flashcards in Muscles of Mastication (week 2) Deck (20):
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Origin of Masseter muscle (superficial head)

Anterior 2/3 of Zygomatic arch

1

Origin of Masseter muscle (Deep head)

Inner aspect of zygomatic arch and inner border of post. 1/3

2

Origin of Temporalis

Temporal fossa and fascia

3

Insertion of Masseter

Lateral surface of ramus and angle of mandible

4

Insertion of Temporalis muscle

Coronoid process and anterior border of ramus of mandible

5

Action of Temporalis muscle

Elevate and retrude the mandible

6

Action of Masseter muscle (Superficial)

Elevate, protrude the mandible

7

Action of Masseter muscle (Deep head)

Retrude from a protruded position

8

Origin of Lateral pterygoid muscle (Superficial head)

Roof of infratemporal fossa - greater wing of sphenoid

9

Origin of Lateral Pterygoid muscle (Inferior head)

Lateral surface of lateral pterygoid plate

10

Action of Lateral pterygoid muscle

Move mandible to opposite side
Together: Protrude the mandible

11

Origin of Medial Pterygoid muscle

Medial surface of lateral pterygoid plate and maxillary tuberosity

12

Insertion of Medial Pterygoid muscle

Medial surface of ramus of mandible

13

Insertion of Lateral Pterygoid muscle (Superior head)

Pterygoid fovea, TMJ capsule and disc.

14

Insertion of Lateral Pterygoid muscle (Inferior head)

Pterygoid fovea

15

Action of Medial Pterygoid muscle

Elevate and protrude the mandible

16

Origin of Buccinator muscle

Pterygomandibular raphae, buccal alveolar process of mandible and maxilla

17

Insertion of Buccinator

Orbicularis oris fibers

18

Action of buccinator

compress cheeks to push food onto teeth

19

Nerve to Buccinator muscle

CN VII