Muscles of Mastication Flashcards Preview

S1 Anatomy > Muscles of Mastication > Flashcards

Flashcards in Muscles of Mastication Deck (16):
1

temporalis
-origin

floor of temporal fossa
deep surface of temporal fascia`

2

temporalis
-insertion

tip of medial surface of coronoid process
anterior border of ramus of mandible

3

temporalis
-action

elevates mandible closing jaw
posterior fibers retrude protrude jaw

4

temporalis
-innervation

deep temporal branches of mandibular nerve (CN V3)

5

masseter
-origin

inferior border and medial surface of zygomatic arch

6

masseter
-insertion

lateral surface of ramus of mandible
coronoid process of mandible

7

masseter
-action

elevates and protrudes mandible, closing jaw
deep fibers retrude mandible

8

masseter
-innervation

masseteris nerve - branches of mandibular nerve (CN V3)

9

lateral pterygoid
-origin

superior head
-infratemporal surface and infratemporal crest of greater wing of sphenoid
inferior head
-lateral surface of lateral pterygoid plate

10

lateral pterygoid
-insertion

neck of mandible
articular disc and capsule of TMJ

11

lateral pterygoid
-action

bilaterally
-protrude mandible
-drop jaw
unilaterally
-alternatively produce side-to-side movement of mandible

12

lateral pterygoid
-innervation

lateral pterygoid nerve
-branch of mandibular nerve (CN V3)

13

medial pterygoid
-origin

deep head
-hedial surface of lateral pterygoid plate
-pyramidal process of palatine bone
superficial head
-tuberosity of maxilla

14

medial pterygoid
-insertion

medial surface of ramus of mandible inferior to mandibular foramen

15

medial pterygoid
-action

helps elevate mandible, closing jaw
bilaterally
-helps protrude mandible
acting alternately
-produce grinding

16

medial pterygoid
-innervation

medial pterygoid nerve
-branch of mandibular nerve (CN V3)