Anatomy: MoM

Question 0

Where does the temporalis originate and insert?

What is its function?

Answer 0

Origin: temporal bone in temporal fossa
Insert: fibres go beneath zygomatic arch to inset into coronoid process

Function: elevate and retract

Question 1

Where does the masseter originate and insert?

What is its function?

Answer 1

Originates:

1. Larger: anterior two thirds zygomatic process of maxilla, zygomatic arch
2. Smaller: posterior 1/3 of zygomatic arch

Insertion:

1. larger superficial head lateral surface of angle/ramus
2. Ramus and coronoid process

Function: elevate mandible

Question 2

Where does the lateral pterygoid originate and insert?

What is its function?

Answer 2

Origin:
Upper head: infratemporal crest of greater wing of sphenoid
Lower head: lateral surface of lateral pterygoid plate of sphenoid

Insert: capsule and disc of TMJ and ptyergod fovea on mandibular condyle

Function: profusion, lateral excursion, assist depressin and opening of jaw

Question 3

Where does the medial pterygoid originate and insert?

What is its function?

Answer 3

Orign: medial surface of lateral pterygoid plate and maxillary tuberosity

Insert: medial surface if angle and ramus of mandible

Function: protruding lateral excusin and elevation

Question 4

Which muscle of pierced by the parotid duct?

Answer 4

Buccinator

Question 5

Where does the anterior and posterior belly of diagastruc originate and insert?
What is its function?

Answer 5

Connected via an intermediate tendon

Mastoid –> tendon –> diagastruc fossa

Retract and depress mandible

Question 6

Where does the mylohoid originate and insert?

What is its function?

Answer 6

Orign: mylohoid line of mandible
Inseett: hyoid bone

Function: depress mandible, raises FOM

Question 7

Which muscles are supplied by CNV3?

Answer 7

All except posterior prolly diagastruc which is supplied by facial

Question 8

Which muscles elevate the jaw?

Answer 8

Temporalis
Masseter
Medial pterygoid

Question 9

Which muscles depress the jaw?

Answer 9

Diagastruc and mylohoid and geniohyoid

Question 10

Which muscles do protrusion and lateral movement?

Answer 10

Lateral pterygoid

Question 11

How do mylohoid and geniohyoid work?

Answer 11

They stabilise hyoid bone