Nerves of Pharynx

Question 1

What are the three divisions of the trigeminal nerve (CN V)?

Answer 1

Ophthalmic nerve (CN V1)
Maxillary nerve (CN V2)
Mandibular nerve (CN V3)

Question 2

Name nerve A.

Answer 2

Ophthalmic nerve (CN V1)

Question 3

Name nerve B.

Answer 3

Maxillary nerve (CN V2)

Question 4

Name nerve C.

Answer 4

Mandibular nerve (CN V3)

Question 5

Name nerve D.

Answer 5

Glossopharyngeal nerve (CN IX)

Question 6

Name nerve E.

Answer 6

Hypoglossal nerve (CN XII)

Question 7

Name structure F.

Answer 7

Superior sympathetic ganglion

Question 8

Name nerve G.

Answer 8

Vagus nerve (CN X)

Question 9

Name nerve H.

Answer 9

Spinal accessory nerve (CN XI)

Question 10

What is the origin of the ophthalmic nerve?

Answer 10

Trigeminal ganglion

Question 11

Describe the course of the ophthalmic nerve.

Answer 11

Runs anteriorly through cavernous sinus, passes into orbit via superior orbital fissure.

Question 12

What structures are supplied by the ophthalmic nerve?

Answer 12

Skin of upper face
Portions of nose and nasal cavity
Eye, conjunctiva
Membranes of frontal, sphenoid, ethmoidal paranasal sinuses

Question 13

What type of nerve is the ophthalmic nerve?

Answer 13

Sensory

Question 14

What is the origin of the maxillary nerve?

Answer 14

Trigeminal ganglion

Question 15

Describe the course of the maxillary nerve

Answer 15

Anteriorly through cavernous sinus
Passes pterygopalatine fossa via foramen rotundum

Question 16

What type of nerve is the maxillary nerve?

Answer 16

Sensory

Question 17

Describe the structures supplied by the maxillary nerve.

Answer 17

Skin of middle face
Portions of nose and nasal cavity
Orbit
Sphenoid sinus
Maxillary sinus
Maxillary teeth

Question 18

What is the origin of the mandibular nerve?

Answer 18

Trigeminal ganglion

Question 19

Describe the course of the mandibular nerve

Answer 19

Runs inferiorly through the foramen ovale and into infratemporal fossa.

Question 20

Describe the sensory structures supplied by the mandibular nerve

Answer 20

Skin of anterior ear, cheek, lower face, lips
Mucosa of cheeks and floor of oral cavity
Anterior two thirds of tongue
Teeth of mandible
Temporomandibular joint

Question 21

Describe the motor structures supplied by the mandibular nerve

Answer 21

Muscles of mastication
Tensor tympani
Tensor veli palatini
Mylohyoid
Anterior digastric muscles

Question 22

What type of nerve is the maxillary nerve?

Answer 22

Sensory and motor

Question 23

What is the origin of the glossopharyngeal nerve?

Answer 23

Medulla oblongata of brainstem

Question 24

Describe the course of the glossophryngeal nerve.

Answer 24

Laterally from brainstem to jugular foramen
Emerges below skull
Passes between internal jugular vein and internal carotid artery
Wraps around stylopharyngeus muscle
Terminates into branches between superior and middle pharyngeal constrictors

Question 25

What type of innervation is supplied by the glossopharyngeal nerve?

Answer 25

Parasympathetic, sensory, motor

Question 26

Describe the structures that are provided parasympathetic innervation by the glossopharyngeal nerve.

Answer 26

Parotid gland

Question 27

Describe the structures that are provided motor innervation by the glossopharyngeal nerve.

Answer 27

Stylopharyngeus muscle

Question 28

Describe the structures that are provided sensory innervation by the glossopharyngeal nerve.

Answer 28

Tympanic cavity, auditory tube
Oropharynx
External ear
Posterior third of tongue
Carotid body
Carotid sinus