Muscle Of Mastication

Question 1

All muscle of mastication supplied by 1 nerve EXCEPT medial
pterygoid by 2

Answer 1

1-anterior division of mandibular

2-the trunk of mandibular nerve

Question 2

Temporalis
Origin

Insertion

Nerve Supply

Action

Answer 2

Origin : From floor of temporal fossa and temporal
fascia.
Insertion : Into coronoid process of the mandible
and anterior border of the mandibular ramus down
to the last molar tooth.
Nerve Supply : mandibular N. (anterior division).
Action :
-Anterior and superior fibers elevate mandible.
-Posterior fibers retract the protruded mandible

Question 3

Masseter Muscle

Origin

Insertion

Nerve Supply

Action

Answer 3

Origin : from inner surface and lower border of
zygomatic arch.
Insertion : into outer surface of the mandibular
ramus.
Nerve Supply : mandibular N, (Anterior division).
Action : elevation of mandible to close the mouth,
so of value in biting and chewing.