Muscles of mastication Flashcards
1
Q
Why is anterior dislocation of the jaw more common than posterior?
A
Because the postglenoid tubercle prevents the condylar process of the mandible from slipping backwards
2
Q
What are the 4 major muscles of mastication?
A
- Temporalis
- Masseter
- Medial pterygoid
- Lateral Pterygoid
3
Q
What nerve innervates the muscles of mastication?
A
The mandibular branch of the trigeminal nerve
4
Q
What muscle is this and what are its actions?
A
Temporalis
Retracts and elevates mandible
5
Q
What muscle is this and what are its actions?
A
Masseter
Elevates the mandible
6
Q
What muscle is this and what are its actions?
A
Medial Pterygoid
Elevation and lateral movements of mandibles
7
Q
What muscle is this and what are its actions?
A
Lateral Pterygoid
Protrudes, depresses, and laterally moves mandible
