Muscles of Facial Expression

Question 1

Which Cranial Nerve innervates the muscles of the face

Answer 1

Cranial Nerve VII Facial Nerve

Question 2

How many different groups of facial muscles are there

Answer 2

5

Question 3

What are the different groups of facial muscles

Answer 3

Oral
Nasal
Orbital
Auricular
Calvaria and Neck

Question 4

What are some of the muscles of facial expression

Answer 4

Orbicularis Oris
Zygomaticus Major + Minor
Levator Anguli Oris

Question 5

What does the Orbicularis Oris muscle do

Answer 5

Helps to close and pucker, whistle and lip round

Important in swallowing to keep the food in and speech sound production

Question 6

What does the Zygomaticus Major and Minor muscles do

Answer 6

They are muscles that pull the lips up and back when we smile

Question 7

What does the Levator Anguli Oris muscle do

Answer 7

This helps to elevate the angle of the mouth so our mouth is pulled upwards and deepens the nasiolabial fold

Question 8

What does the Depressor Anguli Oris muscle do

Answer 8

This pulls down the corner of the mouth - best seen when making a sad face

Question 9

What does the Levator Labii Superioris muscle do

Answer 9

This helps to elevate the upper lip and deepening on the nasolabial fold (smile lines)

Question 10

What does the Depressor Labii Superioris muscle do

Answer 10

This helps to pull the lower lip downwards during mastication and may contribute to facial expressions such as sadness

Question 11

What does the Risorius muscle do

Answer 11

Helps to pull the muscles laterally when laughing or smiling

Question 12

What does the Mentalis muscle do

Answer 12

Wrinkles the skin of the chin and protrudes the lower lip

Question 13

What does the Buccinator muscle do

Answer 13

One of the primary muscles of the cheek. It is important in mastication as it compresses during chewing. It also directs food between the teeth. It also assists in whistling, sucking and blowing