Muscles innervated by trigeminal nerve

Question 1

Masseter

Answer 1

O: inferior and medial border of zygomatic arch
I: wraps around ramus of mandible (lateral surface)
N: Trigeminal nerve: mandibular branch
A: elevation of mandible (closes mouth)

Question 2

Temporalis

Answer 2

O: temporal fossa and fascia
I: coranoid process
N: Trigeminal: temporalis branch
A: elevates and retracts mandible

Question 3

medial pterygoid

Answer 3

O: sphenoid, palantine and maxilla
I: inner surface of ramus
N: Trigeminal
A: close jaw–parallels masseter

Question 4

Lateral Pterygoid

Answer 4

O: sphenoid
I: anterior surface of mandibular condyle
N: Trigeminal
A: opens jaw, protrudes jaw, moves it side to side