Face and scalp

Question 1

What is a dermatome?

Answer 1

The area of skin supplied by the sensory fibres in a given somatic nerve

Question 2

What are the 3 divisions of the trigeminal nerve?

Answer 2

• Ophthalmic (V1/a)
• Maxillary (V2/b)
• Mandibular (V3/c)

Question 3

Where are branches of the ophthalmic division found?

Answer 3

Orbit
Mid-nose
forehead

Question 4

Where are branches of the maxillary division found?

Answer 4

Maxilla

anterior temple

Question 5

Where are branches of the mandibular division found?

Answer 5

mandibule

mid-temple

Question 6

What is the dominant nerve of the ophthalmic division?

Answer 6

Supra-orbital nerve

Question 7

What is the dominant nerve of the maxillary division?

Answer 7

Infra-orbital nerve

Question 8

What is the dominant nerve of the mandibular division?

Answer 8

Mental nerve

Question 9

What is the other nerve that supplies the face below the ear?

Answer 9

Great auricular nerve

Question 10

What are the nerves that are found in the ophthalmic division?

Answer 10

• supra-orbital
• lacrimal (eye lid)
• supra-trochlear
• infra-trochlear
• external nasal

Question 11

What are the nerves found in the maxillary division?

Answer 11

Infra-orbital
Zygomatico-temporal
zygomatic-facial

Question 12

What are nerves found in the mandibular divisions?

Answer 12

auriculo-temporal
long buccal
mental nerve

Question 13

What foraminae does the supra-orbital nerve pass through?

Answer 13

supra-orbital foraminae

Question 14

What foraminae does the infra-orbital nerve pass through?

Answer 14

infra-orbital foraminae

Question 15

What foraminae does the mental nerve pass through?

Answer 15

Mental foraminae

Question 16

How does action potentials travel in the cranium?

Answer 16

The trigeminal nerve conveys action potentials centrally from the face towards the trigeminal sensory ganglion in the middle of cranial fossa

Question 17

Where are the cell bodies of the trigeminal neurones whose axons form these sensory branches found?

Answer 17

Trigeminal sensory ganglion

Question 18

What are the 5 layers of the scalp?

Answer 18

• Skin
• connective tissue
• aponeurosis
• loose connective tissue
• periosteum

Question 19

What does ophthalmic artery give rise to?

Answer 19

supraorbital and supratrochlear arteries

Question 20

What main blood supply to the face?

Answer 20

Facial artery

Question 21

What is the epicranial aponeurosis?

Answer 21

Flattened tendon between frontalis and occipitalis