Muscles of Mastication Flashcards Preview

S1 Anatomy > Muscles of Mastication > Flashcards

Flashcards in Muscles of Mastication Deck (16)
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1
Q

temporalis

-origin

A

floor of temporal fossa

deep surface of temporal fascia`

2
Q

temporalis

-insertion

A

tip of medial surface of coronoid process

anterior border of ramus of mandible

3
Q

temporalis

-action

A

elevates mandible closing jaw

posterior fibers retrude protrude jaw

4
Q

temporalis

-innervation

A

deep temporal branches of mandibular nerve (CN V3)

5
Q

masseter

-origin

A

inferior border and medial surface of zygomatic arch

6
Q

masseter

-insertion

A

lateral surface of ramus of mandible

coronoid process of mandible

7
Q

masseter

-action

A

elevates and protrudes mandible, closing jaw

deep fibers retrude mandible

8
Q

masseter

-innervation

A

masseteris nerve - branches of mandibular nerve (CN V3)

9
Q

lateral pterygoid

-origin

A

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

10
Q

lateral pterygoid

-insertion

A

neck of mandible

articular disc and capsule of TMJ

11
Q

lateral pterygoid

-action

A
bilaterally
-protrude mandible
-drop jaw
unilaterally
-alternatively produce side-to-side movement of mandible
12
Q

lateral pterygoid

-innervation

A

lateral pterygoid nerve

-branch of mandibular nerve (CN V3)

13
Q

medial pterygoid

-origin

A
deep head
-hedial surface of lateral pterygoid plate
-pyramidal process of palatine bone
superficial head
-tuberosity of maxilla
14
Q

medial pterygoid

-insertion

A

medial surface of ramus of mandible inferior to mandibular foramen

15
Q

medial pterygoid

-action

A
helps elevate mandible, closing jaw
bilaterally
-helps protrude mandible
acting alternately
-produce grinding
16
Q

medial pterygoid

-innervation

A

medial pterygoid nerve

-branch of mandibular nerve (CN V3)