Facial Muscles

Question 1

Mention the parts of which the orbicularis oculi is formed.

Answer 1

Orbital
Plapebral
Lacrimal

Question 2

What’s the nerve supply of the orbicularis oculi?

Answer 2

Temporal and zygomatic branches of the facial nerve

Question 3

What’s the function of each part of the orbicularis oculi?

Answer 3

Orbital -> closing the eyes suddenly as in danger
Palpebral -> closing the eyes gently as in sleep
Lacrimal -> helps in drainage of tears

Question 4

What’s the muscle of the cheek?

Answer 4

Buccinator muscle

Question 5

What’s the origin of the buccinator muscle?

Answer 5

Upper part from the alveolar process opposite the upper three molars
Lower part from the oblique line of mandible opposite the lower three molars
Middle part from the pterygomandibular ligament

Question 6

What’s the insertion of the buccinator muscle?

Answer 6

Upper part in the upper lip, lower part in the lower lip and middle part decussates so that the upper part inserts in the lower lip and the lower part in the upper lip so that it acts as a sphincter.

Question 7

What pierces the buccinator muscle?

Answer 7

Parotid duct, buccal nerve and buccal vessels.

Question 8

What’s the nerve supply of the buccinator muscle?

Answer 8

Buccal branch of facial nerve.

Question 9

What’s the nerve supply of the orbicularis oris?

Answer 9

Buccal and mandibular branches of facial nerve