Search for notes by fellow students, in your own course and all over the country.
Browse our notes for titles which look like what you need, you can preview any of the notes via a sample of the contents. After you're happy these are the notes you're after simply pop them into your shopping cart.
Title: Main Muscles of Mastication
Description: This is a brief explanation of 4 main muscles of mastication
Description: This is a brief explanation of 4 main muscles of mastication
Document Preview
Extracts from the notes are below, to see the PDF you'll receive please use the links above
University of Dundee
Dental School
Main Muscles of Mastication
Understand the location origin insertion and nerve supply
Temporalis
Masseter
for
MedialPterygoid
Lateral Pterygoid
Action of these four muscles
the initial phase of mechanical digestion takes place in the oralcavity
and is known as mastication chewing
The teeth bite off chunks of foodwhich are ground between the
teeth
This action induces the secretion of saliva
the tongue mixes the chewed food with the saliva ensuring that
moistened and reduced into a soft
pulp
when it reaches the stomach enzymes and acid continue
chemically breakdown the food
it is
The muscles of mastication are the strong muscles
to
involved
in
chewing they forcibly open and close the the mandible jaw as
well as move it forwards andbackwards and from side to side
they
include
I Temporalis A large fanshaped muscle on the lateral surface
of the head
Origin
temporal bone inferior temporallines
coronoid process
Insertion
Mandible
Action
Elevate and retract the mandible
maQ
m
Origin
jÉ
Zygomatic bone
arch
Insertion
mandible ramus
Action
Elevate the mandible
3 Medial pterygoid A rectangular muscle locateddeep to the mandible
origin
Insertion
Action
sphenoidbone
ummmm
mandible angle
Opens andcloses the
moves
and forwards to backwards
jaw
ni
ii Éi
ii
thejaw fromside toside
4 Lateral pterygoid
Origin
A muscle with two heads located deep to the
sphenoid bone
mandible
greater wing
Insertion
Mandible
Action
Opens protrudes
and laterally movesthe mandible
th
ff
Title: Main Muscles of Mastication
Description: This is a brief explanation of 4 main muscles of mastication
Description: This is a brief explanation of 4 main muscles of mastication