Muscles for Mastication

Question 1

OIAI of Masseter Muscle

Answer 1

O- Lateral surface of the ramus and the mandible ventral to the zygomatic arch
I- Ventrolateral surface of the mandible
A- Raise the mandible in the closing mouth
I- Trigeminal nerve

Question 2

OIAI of Temporalis Muscle

Answer 2

O- Temporal fossa
I- Coronoid process of the mandible
A- Raise the mandible in closing the mouth
I- Trigeminal nerve (Temporalis nerve of the ramus mandibular)

Question 3

OIAI of Pterygoideus Lateralis Muscle

Answer 3

O- Sphenoid bone, ventral to alar canal, round foramen and orbital fissure
I- Medial surface of the mandibular condyle
A- Raise the mandible
I- Trigeminal nerve (Pterygoidei nerve of the ramus of mandible)

Question 4

OIAI of Pterygoideus Medialis Muscle

Answer 4

O- Lateral surface of the pterygoid, palatine, and sphenoid bones
I- Medial and caudal surface of the angular process of mandible
A- Raise the mandible
I- Trigeminal nerve