Muscles of mastication

MUSILE OF MASTICATION/
MUSCLE ACTING ON
MANDIBLED TMJ)




Reference : Mccre's
-


Anatomy




-
Sachin Shah
UIST Medical Collegee
Nepal

, MUSCLES OF MASTICATION

the muscles responsible for movements of the mandible
These primary
-

are

(jaw) during chewing
.




-
All arises From the 1st Pharyngeal arch and are
supplied by the

of the (v3 : motor root)
mandibular division trigeminal nerve
-




-
4 muscles : -




i) Temporalis
ii Masseter

iii) Medial Dterygoid
iv Lateral Pterygoid

i) Temporalis
muscle
Triangular/Fan shaped
-




it is

attachment : -Broad end attachment as triangular muscles
Origin/Proximal
·
.




-
Floor of temparal Fossa

surface
-


Deep of temporal Fascia




Insertion / Distal attachment -
:

·




-
Narrow attachment to tip and medial surface of coronoid

and anterior border of ramus of mandible
process

· Nerve supply :-
-




Deep temporal nerves [Branch of anterior trunk of mandibular

Nervel CN v3) =



Action :
·
-




-

Elevates mandible , closing jaws
-
posterior , more horizental libers are


10 retractors of mandible .