Facial muscles - pt text Chapter 6

Question 1

Name the 12 muscles of the face:

Answer 1

1. Orbicularis oris
2. Risorius
3. Buccinator
4. Levator labii superioris
5. zygomatic minor
6. Levator labii superioris alaeque nasi
7. Levator anguli oris
8. Zygomatic major
9. Depressor labii inferioris
10. Depressor anguli oris
11. Mentalis
12. Platysma (also can be mandibular as contributes do jaw depression)

Question 2

Name the 4 intrinsic tongue muscles:

Answer 2

1. Superior longitudinal
2. Inferior longitudinal
3. Transverse
4. Vertical

Question 3

Name the 4 (or 5) extrinsic tongue muscles:

Answer 3

1. Genioglossus
2. Hyoglossus (and chondroglossus)
3. Styloglossus
4. Palatoglossus (also a muscle of the soft palate)

Question 4

Name muscles that elevate or depress the mandible:

Answer 4

1. Masseter
2. Temporalis Muscle
3. Medial Pterygoid Muscle
4. Lateral Pterygoid Muscle
5. Digastricus Muscle
6. Mylohyoid Muscle
7. Geniohyoid Muscle
8. Platysma

Question 5

Name the 5 muscles of the soft palate:

Answer 5

1. Levator veli palatini
2. musculus uvulae
3. Tensor veli palatini
4. Palatoglossus
5. Palatopharyngeus

Question 6

Which nerve innervates the obicularis oris?

Answer 6

Mandibular marginal and lower buccal branches of CN VII Facial Nerve

Question 7

Which 2 muscles retract the corners of the mouth?

Answer 7

• Risorius

* Buccinator

Question 8

Innervation for the risorius comes from….?

Answer 8

Buccal branch of CN VII Facial Nerve

Question 9

This muscle lies deep to the risorius, following a parallel course and like the risorius, is involved in mastication.

Answer 9

Buccinator

Question 10

The buccinator muscle is innervated by which nerve?

Answer 10

Buccal branch of CN VII Facial Nerve

Question 11

This muscle is used to move food onto the grinding surfaces of the molars and contraction of this muscle tends to constrict the oropharynx

Answer 11

Buccinator

Question 12

Which 3 muscles are grouped together because they share an insertion point in the mid-lateral region of the upper lip (they are all responsible for upper lip elevation)?

Answer 12

1. Levator labii superioris
2. Zygomatic minor
3. Levator labii superioris alaeque nasi

Question 13

This superficial muscle originates along the fascia of the masseter and courses forward to insert in the obicularis oris at the corner of the mouth.

Answer 13

Risorius

Question 14

Nostril flaring muscle.

Answer 14

Levator labii superioris alaeque nasi

Question 15

Levator labii superioris alaeque nasi
Zygomatic minor
Levator labii superioris
… are all innervated by which nerve?

Answer 15

Bucchal branch of CN VII Facial Nerve

Question 16

Which muscle originates at the facial surface of the zygomatic bone and courses downwards to insert into the mid-lateral region of the upper lip?

Answer 16

Zygomatic minor

Question 17

Which muscle originates from the frontal process of the maxilla and courses downwards along the lateral margin of the nose to insert into the mid-lateral region of the upper lip?

Answer 17

Levator labii superioris alaeque nasi

Question 18

Which muscle originates from the infraorbital margin of the maxilla, coursing down to insert into the mid-lateral region of the upper lip.

Answer 18

Levator labii superioris

Question 19

This muscle arises from the canine fossa of the maxilla and inserts into the corners of the upper and lower lips. It serves to draw the corners of the mouth up and medially.

Answer 19

Levator anguli oris

Question 20

The levator anguli oris is innervated by which nerve?

Answer 20

The superior buccal branch of CN VII facial nerve.

Question 21

This muscle arises lateral to the zygomatic minor on the zygomatic bone, but takes a more oblique course, inserting into the corner of the orbicularis oris.

Answer 21

Zygomatic major

Question 22

Which nerve innervates the zygomatic major muscle?

Answer 22

The buccal branches of CN VII Facial nerve.

Question 23

This muscle elevates and retracts the angle of the mouth for smiling.

Answer 23

Zygomatic major

Question 24

This muscle originates from the mandible at the oblique line and courses up and in to insert into the lower lip.

Answer 24

Depressor labii inferioris

Question 25

This muscle pulls the lower lip down and out, to dilate the mouth.

Answer 25

Depressor labii inferioris

Question 26

Depressor labii inferioris is innervated by which nerve?

Answer 26

Mandibular marginal branch of CN VII Facial nerve

Question 27

This muscle originates along the lateral margin of the mandible on the oblique line. Its fan-like fibres converge on the obicularis oris and upper lip at the corner.

Answer 27

Depressor anguli oris

Question 28

This muscle helps to compress the upper lip against the lower lip, depress the corners of the mouth and produce a frown.

Answer 28

Depressor anguli oris

Question 29

The depressor anguli oris muscle is innervated by which nerve?

Answer 29

The mandibular marginal branch of CN VII Facial nerve

Question 30

This muscle originates from the region of the incisive fossa of the mandible and courses down to insert into the skin of the chin below.

Answer 30

Mentalis muscle

Question 31

Contraction of this muscle elevates and wrinkles the chin and pulls the lower lip out (pouting)

Answer 31

mentalis muscle

Question 32

Which nerve innervates the mentalis muscle?

Answer 32

Mandibular marginal branch of CN VII facial nerve.

Question 33

This muscle originates in the fascia of the pectoralis major and deltoid, coursing up to insert into the corner of the mouth, the region below the symphesis mente and the lower margin of the mandible, fanning to insert into the skin near the masseter.

Answer 33

Platysma

Question 34

Which nerve innervates the platysma?

Answer 34

Cervical Branch of CN VII Facial nerve

Question 35

This neck muscle assists in depressing the mandible.

Answer 35

Platysma

Question 36

These muscles assist in retraction of the lips as well as supporting entrapment of air within the oral cavity.

Answer 36

• Risorius

* Buccinator