Superficial Face & Muscles of Facial Expression

Question 1

What is the extent of the face?

Answer 1

Anterior aspect of the head from forehead to chin and one ear to another

Question 2

Describe the nerves all involved in the CUTANEOUS nerve supply of the face & scalp

Answer 2

CN V1, 2, 3
Cervical 2 (greater occipital)
Cervical 3 (third occipital)

C2 & C3 (angle of mandible and greater auricular nerve (just behind the ear)

Question 3

What is the nerve supply & actions of the orbicularis oculi?

Answer 3

Innervation: Temporal & Zygomatic branches of Facial nerve (CN VII)

Actions: Close eyelids by contracting whether involuntary or deliberate

Question 4

What is the attachments, nerve supply & actions of the orbicularis oris?

Answer 4

Attaches: Mandible/Maxilla medially, and surrounding muscles

Innervation: Buccal & Mandibular branches of CN VII

Action: to close and/or protrude the lips

Question 5

What is the nerve supply & actions of the buccinator?

Answer 5

Innervation: Buccal branches of CN VII

Action: Press cheeks against molar teeth + works with tongue to keep food between occlusal surfaces

Question 6

What is the attachments, nerve supply & actions of the platysma?

Answer 6

Origin: Subcutaneously of clavicular region
Insertion: Base of mandible

Innervation: Cervical branch of CN VII

Action: Tense the skin of interior face/neck & depress mandible

Question 7

What artery does the majority of the blood supply to the face come from, and what branches does it have?

Answer 7

External carotid artery = majority
Branches of ECA:
- Facial artery
- Buccal, mental, infraorbital (maxillary branch)
- Transverse facial artery

Question 8

What is the main vein in the face that drains the majority of the blood into the Internal jugular vein?

Answer 8

Facial Vein
& some transverse facial vein (upper face)