Muscles of Mastication Flashcards
1
Q
What muscle is a prime mover of jaw closure?
A
Masseter, originating from the zygomatic arch & zygomatic bone to the angle & ramus of mandible.
2
Q
What muscle closes the jaw?
A
Temporalis, originating from the temporal fossa to the coronoid process of mandible via a tendonous pathway deep to zygomatic arch.
3
Q
What muscles provide side to side grinding movements?
A
Medial and Lateral pterygoid.
Medial pterygoid is synergist of masseter and temporalis to elevate mandible.
Lateral pterygoid protracts mandible.
4
Q
Which muscle acts in facial expression and mastication?
A
Buccinator
5
Q
What nerve innervates all the muscles of masticated except the buccinator?
A
Cranial V (Trigeminal Nerve)
