Dissection 11

Question 1

Where is the Temporomandibular Joint located?

Answer 1

Between the mandibular fossa and the articular process of the mandible

Question 2

How is an articular disk related to the TMJ?

Answer 2

It divides it into two cavities

Question 3

Articular Tubercle

Answer 3

The TMJ joint glides forward along this when opening wide

Question 4

Four main muscles of mastication

Answer 4

1. Temporalis
2. Masseter
3. Lateral Pterygoid
4. Medial Pterygoid

Question 5

What does the temporalis muscle connect to?

Answer 5

Side of head to the coronoid process

Elevates and retracts the mandible

Question 6

What is the masseter muscle connected to?

Answer 6

Zygomatic arch to ramus and angle of mandible

Powerful elevator of the mandible

Question 7

What does the medial pterygoid muscle connect to?

Answer 7

Lateral pterygoid plate to angle of the mandible

Question 8

What does the lateral pterygoid muscle connect to?

Answer 8

Lateral surface of lateral pterygoid plate to articular disk of TMJ

Question 9

What muscles elevate the jaw?

Answer 9

1. Masseter
2. Temporalis
3. Medial Pterygoid

Question 10

What muscles depress the jaw?

Answer 10

Lateral Pterygoid

Question 11

What muscles protract the jaw?

Answer 11

1. Masseter
2. Lateral Pterygoid
3. Medial Pterygoid

Question 12

What muscles retract the jaw?

Answer 12

Temporalis

Question 13

What muscles move the jaw side to side?

Answer 13

1. Temporalis
2. Lateral Pterygoid
3. Medial Pterygoid

Question 14

What pharyngeal arch do the muscles of mastication come from?

Answer 14

First

Innervated by trigeminal nerve

Question 15

Name the three branches of the trigeminal nerve.

Answer 15

1. V₁; Ophthalmic division
2. V₂; Maxillary division
3. V₃, Mandibular division

Question 16

Name the primary cutaneous nerve of the head

Answer 16

Trigeminal

Question 17

Where are the motor cell bodies of the trigeminal nerve?

Answer 17

Branchiomotor column in the brainstem

Question 18

Where does the mandibular nerve exit the skull?

Answer 18

Foramen ovale

Question 19

What is the only division of the trigeminal nerve with branchiomotor fibers?

Answer 19

Mandibular nerve

Question 20

Name the somatosensory branches of V₃

Answer 20

1. Meningeal
2. Auriculotemporal
3. Buccal
4. Lingual
5. Inferior Alveolar

Question 21

Name the 7 branchiomotor branches of V₃

Answer 21

1. Medial Pterygoid Nerve
2. Lateral Pterygoid Nerve
3. Deep Temporal Nerve
4. Masseteric Nerve
5. Tensor tympani Nerve
6. Tensor veli palatini nerve
7. Nerve to the mylohyoid

Question 22

What does the nerve to the mylohyoid innervate?

Answer 22

Mylohyoid and anterior belly of digastric

Question 23

What three trigeminal nerves travel parallel to each other?

Answer 23

Anterior- Buccal, Lingual, Inferior Alveolar- Posterior

Question 24

What does the mylohyoid nerve branch off of?

Answer 24

Posterior side of inferior alveolar nerve

Question 25

What does the auriculotemporal nerve surround?

Answer 25

Middle Meningeal Artery

Question 26

Only horizontal nerve in infratemporal fossa

Answer 26

Auriculotemporal nerve

Question 27

Where do the deep temporal nerves run?

Answer 27

Deep surface of the temporalis muscle

Question 28

What cranial nerves do parasympathetic fibers arise from?

Answer 28

III, VII, and IX

Question 29

What type of fibers innervate the parotid gland?

Answer 29

Preganglionic parasympathetic fibers of CN IX

Question 30

Petrosal Nerve

Answer 30

Exits skull via foramen ovale and synapses on the otic ganglion Preganglionic parasympathetic

Question 31

What nerve innervates the parotid gland?

Answer 31

Auriculotemporal Postganglionic parasympathetic

Question 32

What types of fibers does the auriculotemporal nerve contain?

Answer 32

General somatosensory and postganglionic parasympathetic

Question 33

What cranial nerve does the chorda tympani belong to?

Answer 33

Facial VII

Question 34

What fiber types does the chorda tympani have?

Answer 34

Special viscerosensory taste Preganglionic parasympathetic

Question 35

Where does the chorda tympani nerve exit the skull

Answer 35

Petrotympanic fissure

Question 36

What types of fibers innervate the submandibular and sublingual glands?

Answer 36

**Post**ganglionic parasympathetics

Question 37

What are the major branches of the maxillary artery?

Answer 37

* Middle meningeal to the skull * Inferior alveolar to mandibular teeth * Branches to muscles of mastication