Anatomy - CN V - Trigeminal

Question 1

What are the 3 branches of CN V?

Answer 1

1. Ophthalmic
2. Maxillary
3. Mandibular

Question 2

What are the 3 branches of V1?

Answer 2

1. Frontal
2. Lacrimal
3. Nasociliary

Question 3

What are the 2 branches of the Frontal n.?

Answer 3

1. Supratrochlear

2. Supraorbital

Question 4

What are the branches of the Nasociliary n.?

Answer 4

1. Short ciliary nerves
2. Long
3. Post. Ethmoid n.
4. Ant. Ethmoid n.
5. Infratrochlear n.

Question 5

The nasociliary n. enters the orbit more ___ (than the frontal and lacrimal nerves) within the ___ of the supraocular muscles

Answer 5

Inferiorly

Tendinous Ring

Question 6

The frontal and lacrimal nerves enter the orbit through the __

Answer 6

Superior tip of the superior orbital fissure

Question 7

Where does the supratrochlear n. exit the orbit?

What does it supply?

Answer 7

Near the medial corner

Sensory to:
scalp of forehead
frontal sinus
conjunctiva
upper eyelid

Question 8

Where does the supraorbital n. exit the orbit?

What does it supply?

Answer 8

Through the supraorbital foramen

Sensory to:
scalp of the head and forehead
upper eyelid

Question 9

Where does the lacrimal n. exit the orbit?

What does it supply?

Answer 9

Lateral corner

Lacrimal gland

Sensory to:
Conjunctiva
Upper eyelid

Question 10

The lacrimal n. is connected to the ___ nerve of V2

Answer 10

Zygomaticotemporal

Question 11

Which is the most inferior of the V1 branches?

Answer 11

Nasociliary n.

Question 12

Short ciliary nerves carry ___

Answer 12

Sensory info from the eye through ciliary ganglion and, via communicating branches, into the nasociliary

Question 13

Long ciliary nerves carry ___

Answer 13

Sensory info from the eye

BUT bypass the ciliary ganglion

Question 14

Posterior ethmoid n. carries ___

Answer 14

Sensory info to:
Sphenoid sinus
Posterior ethmoid air cells

Question 15

Anterior ethmoid n. carries ___

Answer 15

Sensory info to:
Middle and anterior ethmoid air cells
Anterior portion of nasal septum
Lateral portion of nose

Question 16

Infratrochlear n. carries ___

Answer 16

Sensory info to:
Soft tissue at the corner of the orbit
Conjunctiva
Upper eyelid
Bridge of nose

Question 17

Within the ____ fossa, the maxillary n. gives rise to branches, communicates with ___ and then divides into ___ and ___ nerves.

Answer 17

Pterygopalatine

Pterygopalatine Ganglion

Zygomatic and Infraorbital

Question 18

These nerves arise within the pterygopalatine fossa and connect V2 to the pterygopalatine ganglion:

Answer 18

Ganglionic branches

Question 19

This nerve branches off distal to the pterygopalatine ganglion, courses inferiorly over the tuberosity of the maxilla to enter the Alveolar Canal.
What is it and what does it supply?

Answer 19

Posterior Superior Alveolar n.

Sensory to:
Upper premolars and molars

Question 20

Branches of the Zygomatic n.

Which is a branch off of ___

Answer 20

1. Communicating branch
2. Zygomaticofacial n.
   3 zygomaticotemporal n.

V2

Question 21

Branches of the infraorbital n.

Which is a branch of __

Answer 21

1. Anterior Superior Alveolar n.
2. Inferior Palpebral n.
3. Lateral Nasal n.
4. Superior Labial n.

V2

Question 22

This nerve provides sensory info to upper incisors and canines

Answer 22

Anterior Superior Alveolar n.

Question 23

This nerve courses superiorly from the infraorbital foramen and provides sensory info to the lower eyelid and conjunctiva

Answer 23

Inferior palpebral n.

Question 24

This nerve provides sensory info to the nasal septum and the floor of the nasal cavity

Answer 24

Lateral nasal n.

Question 25

This nerve provides sensory info to: - the skin between the nose and upper lip - the upper lip - a portion of the oral mucosa

Answer 25

Superior labial n.

Question 26

Rank the 3 branches of CN V in order from largest to smallest

Answer 26

Mandibular (3) Maxillary (2) Ophthalmic (1)

Question 27

The mandibular n. is divided into 2 divisions:

Answer 27

Anterior | Posterior

Question 28

The ___ division of V3 is the motor root of the trigeminal, with the exception of ___

Answer 28

Anterior Buccal

Question 29

Nerves in the anterior division of V3:

Answer 29

1. N. to Medial Pterygoid 2. N. to Lateral Pterygoid 3. Masseteric n. 4. Deep Temporal n. 5. Buccal n.

Question 30

This branch of V3 supports the Otic ganglion, but has no synaptic connections there

Answer 30

Nerve to Medial Pterygoid

Question 31

The N. to Medial Pterygoid gives of muscular branches to ___ and ___

Answer 31

Tensor Tympani | Tensor Veli Palatini

Question 32

What does the Masseteric n. innervate?

Answer 32

Masseter

Question 33

What innervates the temporalis muscle?

Answer 33

Deep Temporal n.

Question 34

The buccal n. provides ___ to ___

Answer 34

Sensory info to cheek

Question 35

The posterior division of V3 is the origin of what 3 nerves?

Answer 35

1. Auriculotemporal n. 2. Lingual n. 3. Inferior Alveolar n.

Question 36

The auriculotemporal n. provides __

Answer 36

``` Sensory info: Temporal region TMJ Auditory canal Outer surface of the tympanum ``` Autonomics: Parotid gland

Question 37

At the ___ the lingual n. bifurcates to form the ___

Answer 37

Hyoglossus N. to sublingual gland Sublingual n.

Question 38

The Lingual n. is connected to the ___ by communicating branches

Answer 38

Submandibular Ganglion

Question 39

The sublingual n. gives sensory info to __

Answer 39

Anterior 2/3rds of the tongue

Question 40

N. to mylohyoid is a branch off of ___ It innervates___

Answer 40

Inferior Alveolar n. Mylohyoid Anterior belly of Digastric

Question 41

Within the mandibular canal, the inferior Alveolar n. sends sensory branches to the ___ then bifurcates anteriorly into the __

Answer 41

Lower molars and premolars Incisive n. and Mental n.

Question 42

This nerve gives sensory info to the lower incisors, canine, and the first premolar and gingiva

Answer 42

Incisive n.

Question 43

This nerve gives sensory info to the chin and lower lip

Answer 43

Mental n.