The Scalp

Question 1

name the 5 layers of the scalp

Answer 1

Skin
Connective tissue
Aponeurosis of occipitofrontal muscle (epicranial aponeurosis)
Loose areolar connective tissue
Periosteum

last two are usually not easily visible

Question 2

label the scalp

Answer 2

Question 3

what is the innervation of the anterior (anterior to auricle or external ear) part of the scalp?

Answer 3

• all three branches of trigeminal nerve (CN V).

Question 4

what is the innervation of the posterior scalp?

Answer 4

• cutaneous branches of cervical spinal nerve C2 and C3.

Question 5

label the sensory supply to the regions arrowed

Answer 5

Question 6

what structure forms the ventral rami of C5-T1? what does this formation innervate?

Answer 6

• roots of brachial plexus.
• innervates the skin and musculature of the upper limb and some intrinsic back muscles.

Question 7

in which layer of the scalp are blood vessels present?

Answer 7

Connective tissue (dense)

Question 8

label the arteries of the scalp

Answer 8

Question 9

which arteries of the scalp are branches of the internal carotid artery?

Answer 9

supratrochlear
supra-orbital

Question 10

which arteries of the scalp are derived from branches of the external carotid artery?

Answer 10

superficial temporal
posterior auricular
occipital

Question 11

label the venous drainage of the scalp

Answer 11

Question 12

what are the valveless veins called that allow anastomosis of scalp veins with diploic veins in skull bones?

Answer 12

emissary veins

Question 13

can you think of a couple serious complications that could arise from scalp infections due to the presence of emissary veins?

Answer 13

• septic thrombosis
• meningitis