TMJ

Question 1

What 4 bones come together to form the pterion?

Answer 1

Frontal
Parietal
Temporal
Greater Wing of the Sphenoid

Question 2

What artery is found in the infra temporal fossa?

Answer 2

Maxillary a

Question 3

What venous plexus is found in the infra temporal fossa?

Answer 3

Pterygoid venous plexus

Question 4

What nerves are found in the infra temporal fossa?

Answer 4

Mandibular
Inf. Alveolar
Lingual
Buccal
Chorda Tympani

Question 5

What ganglion is found in the infra temporal fossa?

Answer 5

The otic ganglion

Question 6

Name the 8 soft structures that are found in the infra temporal fossa.

Answer 6

Maxillary a
Pterygoid venous plexus
Mandibular n
Inf. Alveolar n
Lingual n
Buccal n
Chorda Tympani n
Otic Ganglion

Question 7

What type of joint is the TMJ?

Answer 7

A synovial joint

Question 8

What types of motion can the TMJ perform?

Answer 8

Gliding
Rotation
Flexion (elevation)
Extension (depression)
All of the mandible

Question 9

What are the 6 main components of the TMJ?

Answer 9

Mandibular Condyles
Articular Surface of the Temporal Bone
Capsule
Articular Disc
Ligament
Lateral Pterygoid

Question 10

What is the capsule?

Answer 10

Dense fibrous membrane that surrounds the joint

Question 11

What is the articular disc?

Answer 11

Fibrocartilagenous tissue separating the two bones of the TMJ

Question 12

What do the ligaments of the TMJ do? How many are there?

Answer 12

They define the furthest extensions of the mandible. There are 3.

Question 13

What type of motion does the lateral pterygoid muscle allow?

Answer 13

Pulls the mandible forward (protractor)

Question 14

What are the bony articular surfaces of the TMJ?

Answer 14

Mandibular of Fossa of the Temporal Bone

Head of the Mandible

Question 15

What is the articular disc composed of?

Answer 15

Fibrocartilage

Question 16

Where is the articular disc located?

Answer 16

Between the superior and inferior articular surfaces of the TMJ

Question 17

What are the four true muscles of mastication?

Answer 17

Masseter
Temporalis
Medial Pterygoid
Lateral Pterygoid

Question 18

What is the function of the Masseter and Temporalis?

Answer 18

Elevator, retractor of the jaw

Question 19

What is the function of the Medial Pterygoid?

Answer 19

Elevator, protractor of the jaw

Question 20

What is the function of the Lateral Pterygoid?

Answer 20

Depressor, protractor of the jaw

Question 21

What’s the innervation of each muscle of mastication?

Answer 21

Motor Root of CN V3

Masseter = massenteric n
Temporalis = deep temporal branch
Medial Pterygoid = medial pterygoid n
Lateral Pterygoid = lateral pterygoid n

Question 22

What are the accessory muscles of mastication?

Answer 22

Buccinator
Orbicularis Oris
Digastric
Tongue

Question 23

What is the Innervation of the Buccinator?

Answer 23

CN VII

Question 24

What is the innervation of the orbicularis oris?

Answer 24

CN VII

Question 25

What is the innervation of the Digastric?

Answer 25

``` Anterior = V3 Posterior = VII ```

Question 26

What is the innervation of the Tongue?

Answer 26

CN IX

Question 27

List all the nerves of the infra temporal fossa.

Answer 27

``` Buccal branch V3 Muscular branches of V3 Inferior alveolar n Nerve to Mylohyoid Lingual n Chorda Tympani Auricotemporal n ```

Question 28

List the branches of the maxillary artery.

Answer 28

Buccal Masseteric Middle meningeal Infraorbital

Question 29

What is the name of the groove that runs from the mandibular foramen down toward the bottom of the mandible?

Answer 29

The mylohyoid groove

Question 30

What soft tissue structure is associated with the mylohyoid groove?

Answer 30

Nerve to mylohyoid (branch of V3)

Question 31

List the branches of the mandibular division of CN V

Answer 31

``` Meningeal branch Nerve to medial pterygoid Masseteric n Deep temporal n Nerve to lateral pterygoid Buccal n Auriculotemporal n Lingual n Inferior alveolar n ```

Question 32

What is the meningeal branch of the CN V also known as?

Answer 32

Nervous spinosus

Question 33

What is the location of the parotid gland?

Answer 33

Side of face

Question 34

What is the general afferent innervation of the parotid gland?

Answer 34

``` Auriculotemporal n (V3) Greater auricular n ```

Question 35

What is the preganglionic parasympathetic innervation of the parotid gland?

Answer 35

``` Tympanic n (IX) Lesser petrosal n ```

Question 36

What ganglion is associated with the parotid gland?

Answer 36

Otic

Question 37

What is the postganglionic parasympathetic innervation of the parotid gland?

Answer 37

Auriculotemporal n (V3)

Question 38

What is the sympathetic innervation of the parotid gland?

Answer 38

External Carotid arterial plexus

Question 39

What is the location of the submandibular gland?

Answer 39

Sublingual and Submandibular spaces

Question 40

What is the general afferent innervation of the submandibular gland?

Answer 40

Lingual n (V3)

Question 41

What is the preganglionic parasympathetic innervation of the Submandibular Gland?

Answer 41

Chorda Tympani (VII)

Question 42

What ganglion is associated with the Submandibular Gland?

Answer 42

Submandibular

Question 43

What is the postganglionic parasympathetic innervation of the Submandibular Gland?

Answer 43

Lingual n (V3)

Question 44

What is the sympathetic innervation of the Submandibular Gland?

Answer 44

External carotid arterial plexus