Test 2 Questions

Question 1

Where does the temporalis insert into?

Answer 1

Coronoid Process of Mandible

Question 2

Compared to a human, a gorilla has a bite force that is 9x stronger. Explain why.

Answer 2

Gorillas have a larger temporal fossa that can accomodate a temporalis muscle with a greater cross sectional area; resulting in stronger bite force.

Question 3

Where does the temporalis originate?

Answer 3

Temporal fossa floor and temporalis fascia

Specifically originates at inferior temporal line.

Superior temporal line is for faschia attachement

Question 4

Where does the Masseter originate?

Answer 4

Lower border and internal zygomatic arch

Question 5

Where does the masseter insert?

Answer 5

Lateral ramus of mandible

Question 6

What’s the most powerful muscle of mastication?

Answer 6

Temporalis

Question 7

What is the function of masseter?

Answer 7

Elevation of mandible, deep fibers may cause mandibular retraction

Question 8

How many heads does the lateral pterygoid have?

Answer 8

2 heads

1 Superior, 1 Inferior

Question 9

Where does the lateral pterygoid superior head insert into? Originate from?

Answer 9

Insert into anterior portion of intra-articular disk through the lateral pterygoid

Originates on infratemporal surface of sphenoid

Question 10

Where does the lateral pterygoid inferior head insert into? Originate from?

Answer 10

Insert into pterygoid fossa (fovea) of mandibular condyle

Question 11

Functions of lateral pterygoid?

Answer 11

Mandible protrusion, depression, lateral deviation (1 muscle)

Question 12

Where does the medial pterygoid originate and insert?

Answer 12

Superficial head originates from maxillary tuberosity and palatine bone

Deep head originates from lateral pterygoid plate of sphenoid

Both heads insert into medial ramus and angle of mandible

Question 13

How many heads does the medial pterygoid have?

Answer 13

2

1 deep, 1 superficial

Question 14

Functions of medial pterygoid?

Answer 14

Mandible elevation, protraction, and laterial deviation

Question 15

What muscles make up the muscular sling

Answer 15

Masseter and “ipsilateral” medial pterygoid

Question 16

What is significant about the muscular sling?

Answer 16

It supports the mandible on the cranium

Question 17

How many bellies does the digastric muscle have?

Answer 17

2
1 anterior, 1 posterior

Question 18

Where does the anterior and posterior bellies of the digastric originate and insert to?

Answer 18

Anterior belly originates at digastric fossa on mandible

Posterior belly originates on mastoid process (mastoid notch of temporal bone)

both muscles unite and form a tendon/tendinous loop and inserts into hyoid bone.

Question 19

What does the digastric muscle do?

Answer 19

Depression and Retraction of mandible

Stabilization and elevation of hyoid

Question 20

What does the mylohyoid muscle do?

Answer 20

Elevates floor of mouth and depresses mandible

Question 21

What innervates the the muscles of mastication? What is the exception?

Answer 21

Mandibular Division of Trigeminal nerve (CNV3)

Exception is posterior belly of digastric. PB of digastric is innervated by facial nerve

Question 22

What are the boundaries of the temporal fossa? What bones make up the temporal fossa?

Answer 22

Zygomatic process, zygomatic arch, Temporal lines,

Frontal, Parietal, temporal, and sphenoid bones

Question 23

What are the boundaries of the infratemporal fossa?

Answer 23

Lateral pterygoid plate
Maxilla, Mandibular ramus, Greater wing of sphenoid, Posterior wall (carotid sheath and styloid)

Question 24

What openings are in the infratemporal fossa?

Answer 24

Foraman Ovale
Foraman Spinosum
Pterygomaxillary fissue

Question 25

What contents are in the infratemporal fossa?

Answer 25

Medial Pterygoid
Lateral Pterygoid
Temporalis (inferior part)
Maxillary artery (1st and 2nd parts)
Pterygoid venous plexus
Mandibular division of trigeminal nerve and its branches

Question 26

Where does the maxillary artery enter and exit in the infratemporal fossa?

Answer 26

Enter infratemporal fossa around the nexk of the mandible (passes parotid gland)

Exits though pterygomaxillary fissue

Question 27

How many parts does the maxillary artery have? How do you identify the parts?

Answer 27

3 parts

Part 1 - Inferior to lateral pterygoid
Part 2 - on lateral pterygoid
part 3 - Outside of infratemporal fossa

Question 28

What are the branchs of the first part of the maxillary artery?

Answer 28

DAMAI
Deep Auricular
Anterior Tympanic
Middle Meningeal
Accessory Meningeal
Inferior Alveolar

Question 29

What are the branches of the second part of the maxillary artery?

Answer 29

Don’t Play My Baritone Saxophone

Deep temoporal branches
Pterygoid branches
Masseteric branches
Buccal Branch

Question 30

What nerves are on the anterior CNV3?

Answer 30

DNB
Deep temporal nerves
Nerve to Masseter
Buccal Nerve (sensory)
Nerve to lateral pterygoid

Question 31

What are nerves on the posterior CNV3?

Answer 31

Auriculotemporal
Inferior Alveolar –> Mylohyoid (motor)
Lingual Nerve

Question 32

The intrinsic muscles of the tongue change it’s ____ the extrinsic muscles of the tongue change it’s _____

Answer 32

Intrinsic = shape
Extrinsic = position

Question 33

What muscles of the tongue close the oral-pharyngeal opening and elevate the posterior part of the tongue?

Answer 33

Styloglossus and Palatoglossus

Question 34

What does genioglossus do?

Answer 34

?

Question 34

What does hyoglossus do?

Answer 34

depress tongue

Question 34

What does the styloglossus do?

Answer 34

Elevate posterior part of tongue + close oral-pharyngel opening