Sensory Supply of the Face

Question 1

Ophthalmic division (V1)

Sensory or motor or both?
Names of divisions
Where does it enter?

Answer 1

Pure Sensory

Three branches:

• Frontal
• Lacrimal
• Nasociliary

Enters through:
-Superior Orbital Fissure

Question 2

Ophthalmic division (V1):
-Frontal Nerve

What nerve does it give rise to? AND
–>What does it Supply?

Answer 2

Gives rise to:
-Superior Orbital Nerve

Supplies:

• upper eyelid
• forehead
• scalp

Question 3

Ophthalmic division (V1):
-Lacrimal Nerve

Where does it pass to?
Supplies?

Answer 3

Passes:
-to Lacrimal Gland

Gives branches to:

• lateral skin
• conjunctiva of upper eyelid

Question 4

Ophthalmic division (V1):
-Nasociliary Nerve

What does it Supply?
Name of branch?

Answer 4

Sensory Nerve to the eye

Supplies:
-orbit by several branches

Gives rise to:
-External Nasal Nerve–> which supplies: skin of dorsum of the nose

Question 5

Maxillary Division (V2)

Sensory or motor or both?
Course?

Answer 5

Purely sensory

Course:

• leaves middle cranial fossa via foramen rotundum and enters pterygopalatine fossa
• -> gives off a number of branches such as the Zygomatic Nerve

-Main nerve enters the orbit through the inferior orbital fissure as the Infraorbital Nerve

Question 6

Maxillary Division (V2):
-Zygomatic Nerve

Course?

Answer 6

Branch formed at pterygopalatine fossa

Course:

• enters the orbit the the inferior Orbital fissure
• -> runs on the lateral wall of the orbit
• -> divides into two branches which emerge on to the face through foramina in zygomatic bone

Supplies:
-Skin over the zygomatic bone

Question 7

Maxillary Division (V2):
-Infraorbital Nerve

Course?

Answer 7

Course:

• runs on the floor of the orbit
• -> emerges onto the face through the infraorbital foramen

Supplies:

• lower eyelid
• cheek
• upper lip

Question 8

Mandibular Division (V3)

Sensory, motor or both?
Course?
Name of branches?

Answer 8

A mixed nerve (sensory and motor)
-contains all the motor fibres of the trigeminal nerve

Course:
-through the foramen ovale

Branches:

• Mental Nerve
• Buccal Nerve
• Auriculotemporal Nerve

Question 9

Mandibular Division (V3):
-Mental Nerve

A terminal branch of?
Emerges from?
Supplies?

Answer 9

A terminal branch of:
-Inferior Alveolar Nerve

Emerges:
-from the canal at the Mental Foramen

Supplies:
-skin of chin and lower lip

Question 10

Mandibular Division (V3):
-Buccal Nerve

Course?
Supplies?

Answer 10

Course:
-Runs anteriorly to reach the cheek

Supplies:
-Skin and mucous membranes of cheek

Question 11

Mandibular Division (V3):
-Auriculotemporal Nerve

Course?
Supplies?

Answer 11

Course:
-Runs superiorly together with superficial temporal vessels

Supply
-sensory supply to the skin in the temporal region

Question 12

Cervical Plexus

Where is it found?
Branches?

Answer 12

Found in the posterior triangle

• formed by the union of the first four cervical spinal nerves joined together by simple loops.
• Lies deep to the sternomastoid muscle

Branches:
Branches of the plexus can be divided into superficial and deep groups:
-Superficial Group: supplies muscles
-Deep Group: distributed to the skin of the anterior and lateral sides of the neck and lateral aspect of the head.

Cutaneous Branches: from the plexus emerge around the middle of the posterior border of the sternomastoid muscle.

Question 13

Cervical Plexus:
-Great Auricular Nerve

Involves which cervical spinal nerve
Course?
Supplies?

Answer 13

C2 + C3

Course:
-one of the four cutaneous branches of the plexus ascends across the sternomastoid muscle

Supplies:

• skin of the auricle
• angle of the mandible