Week 1 - The Muscles of Mastication Flashcards
1
Q
From what embryological structure are the muscles of mastication derived?
Hence what is their innervation?
A
1st pharyngeal arch
CN V
2
Q
What is the action of the Masseter?
A
Elevates the mandible - closes mouth
3
Q
What is the action of Temporalis?
A
Elevates mandible
Retracts mandible, pulling jaw posteriorly
4
Q
How are the medial and lateral pterygoids positioned relative to each other?
A
Lateral = superior Medial = inferior
5
Q
What does the medial pterygoid do?
A
Elevates mandible
6
Q
What are the actions of the lateral pterygoid?
A
Bilaterally - protracts mandible
Unilaterally - side to side jaw movement
7
Q
Name the 4 muscles of mastication
A
- Masseter
- Temporalis
- Medial pterygoid
- Lateral pterygoid
