Nerve Supply of Scalp Quiz

Which nerve supplies the motor function to the muscles of the scalp?

Which nerve is responsible for the sensory innervation of the anterior part of the scalp?

Which nerve supplies a large part of the posterior scalp as far superiorly as the vertex?

Which nerve arises from the anterior rami of the C2 and C3 spinal nerves and innervates a small area of the scalp just posterior to the ear?

Which nerve supplies an area of the scalp posterior and superior to the ear?

Which cranial nerve innervates the anterior part of the scalp up to the vertex?

What is the arterial supply of the anterior and superior aspects of the scalp?

Which vein drains the area of the scalp posterior to the ear?

Why does scalp bleeding tend to be predominantly arterial?

Which artery supplies almost the entire lateral aspect of the scalp?

Where do the supratrochlear and supraorbital veins drain the anterior part of the scalp?

Nerve Supply to Scalp Muscles

The motor function to the muscles of the scalp is supplied by the facial nerve (CN VII).

Sensory Innervation of Scalp

The sensory innervation of the anterior part of the scalp is primarily provided by the trigeminal nerve (CN V), specifically its frontal branch.

Posterior Scalp Innervation

A large part of the posterior scalp is innervated by the greater occipital nerve, extending superiorly to the vertex.

Nerve from C2 and C3

The lesser occipital nerve, arising from the anterior rami of C2 and C3, innervates a small area of the scalp just posterior to the ear.

Scalp Area Innervation Above Ear

The posterior auricular nerve, a branch of the facial nerve, supplies the area of the scalp posterior and superior to the ear.

Cranial Nerve Innervation Vertex

The trigeminal nerve (CN V) also plays a role in innervating the anterior part of the scalp up to the vertex.

Arterial Supply of Scalp

The arterial supply of the anterior and superior aspects of the scalp is primarily by the supraorbital and supratrochlear arteries.

Vein Drainage Post Ear

The area of the scalp posterior to the ear is drained by the posterior auricular vein.

Scalp Bleeding Characteristics

Scalp bleeding tends to be predominantly arterial due to the rich vascular supply and the positioning of blood vessels in the fibrous tissue, which allows them to remain open when cut.

Lateral Aspect of Scalp Supply

The superficial temporal artery supplies almost the entire lateral aspect of the scalp.

Drainage of Anterior Scalp Veins

Supratrochlear and supraorbital veins drain the anterior part of the scalp into the facial vein.

Test your knowledge on the nerve supply of the scalp, covering motor and sensory innervation by facial nerve, trigeminal nerve, and cervical spinal nerves. Explore the branches and distribution of facial nerve and sensory innervation patterns on different scalp regions.