Muscles Of Facial Expressions

Question 1

What is the primary function of the muscles of facial expression?

Answer 1

To facilitate facial movements and expressions.

Question 2

Which cranial nerve innervates the muscles of facial expression?

Answer 2

The facial nerve (cranial nerve VII).

Question 3

True or False: The muscles of facial expression originate from bone.

Answer 3

False.

Question 4

Fill in the blank: The muscles of facial expression primarily insert into the _______.

Answer 4

skin.

Question 5

Name one muscle that is responsible for closing the eyelids.

Answer 5

Orbicularis oculi.

Question 6

What muscle is primarily responsible for smiling?

Answer 6

Zygomaticus major.

Question 7

Which muscle is involved in puckering the lips?

Answer 7

Orbicularis oris.

Question 8

What is the origin of the frontalis muscle?

Answer 8

The galea aponeurotica.

Question 9

Which muscle assists in frowning?

Answer 9

Depressor anguli oris.

Question 10

True or False: The buccinator muscle is responsible for chewing.

Answer 10

True.

Question 11

Multiple choice: Which of the following muscles is NOT a muscle of facial expression? A) Risorius B) Masseter C) Platysma

Answer 11

B) Masseter.

Question 12

What is the primary action of the platysma muscle?

Answer 12

To depress the mandible and tense the skin of the neck.

Question 13

What is the insertion point of the orbicularis oris?

Answer 13

Mucous membrane of the lips.

Question 14

Fill in the blank: The _______ muscle is responsible for raising the eyebrows.

Answer 14

Frontalis.

Question 15

Name the muscle that helps in blowing air out of the mouth.

Answer 15

Buccinator.

Question 16

What is the innervation of the zygomaticus major?

Answer 16

Facial nerve (CN VII).

Question 17

True or False: The corrugator supercilii muscle is responsible for raising the eyebrows.

Answer 17

False.

Question 18

What is the action of the risorius muscle?

Answer 18

To pull the corners of the mouth laterally.

Question 19

Multiple choice: Which muscle is primarily responsible for frowning? A) Frontalis B) Depressor anguli oris C) Orbicularis oculi

Answer 19

B) Depressor anguli oris.

Question 20

What is the origin of the orbicularis oculi?

Answer 20

Frontal bone and maxilla.

Question 21

Fill in the blank: The _______ muscle aids in closing the mouth.

Answer 21

Orbicularis oris.

Question 22

Which muscle is involved in expressing surprise?

Answer 22

Frontalis.

Question 23

What is the role of the mentalis muscle?

Answer 23

To elevate and protrude the lower lip.

Question 24

True or False: The facial nerve branches into five main divisions.

Answer 24

True.

Question 25

What is the innervation of the buccinator muscle?

Answer 25

Facial nerve (CN VII).

Question 26

Name the muscle that pulls the eyebrows together.

Answer 26

Corrugator supercilii.

Question 27

What is the action of the depressor labii inferioris?

Answer 27

To lower the lower lip.

Question 28

What's the origin of the muscles of facial expressions?

Answer 28

From the mesoderm of the 2nd pharyngeal arch

Question 29

Which nerves supply the muscles of facial expressions?

Answer 29

Temporal,zygomatic,buccal,marginal mandibular,cervical and posterior auricular nerves

Question 30

Describe the occipitofrontalis muscle

Answer 30

Has ; 1️⃣ frontal belly- innervated by temporal nerve 2️⃣ occipital belly- innervated by posterior auricular nerve Action- elevates the eyebrows and wrinkles forehead

Question 31

Described the orbicularis Oculi muscle

Answer 31

Has two parts: 1️⃣ palpebral part - closes eyelids gently 2️⃣ orbital part- closes eyelids tightly Superior part -innervated by temporal nerve Inferior part- innervated by zygomatic nerve