Muscles of Facial Expression

Question 1

Name muscle A.

Answer 1

Occipitofrontalis muscle

Question 2

Name muscle B.

Answer 2

Bucinator

Question 3

Name muscle A.

Answer 3

Platysma

Question 4

Name muscle B.

Answer 4

Orbicularis oris

Question 5

Name muscle C.

Answer 5

Orbicularis oculi.

Question 6

What is the origin of the occipital belly of the occipitofrontalis muscle?

Answer 6

Supreme nuchal line of occipital bone

Question 7

What is the origin of the frontal belly of the occipitofrontalis muscle?

Answer 7

Epicranial aponeurosis

Question 8

Describe the insertion of the occipital belly of the occipitofrontalis muscle.

Answer 8

Epricranial aponeurosis

Question 9

What is the insertion of the frontal belly of the occipitofrontalis muscle?

Answer 9

Skin of eyebrows and root of nose.

Question 10

Describe the action of the occipital belly of the occipitofrontalis muscle.

Answer 10

Draws scalp backwards.

Question 11

Describe the action of the frontal belly of the occipitofrontalis muscle.

Answer 11

Raises eyebrows and wrinkles forehead.

Question 12

Describe the innervation of the occipitofrontalis muscle.

Answer 12

Posterior auricular nerve and temporal branches of facial nerve.

Question 13

Describe the blood supply of the occipitofrontalis muscle.

Answer 13

Superficial temporal artery, ophthalmic artery, posterior auricular, occipital arteries

Question 14

Describe the origin of the bucinator.

Answer 14

Alveolar processes of maxilla and mandible, pterygomandibular raphe.

Question 15

Describe the insertion of the bucinator.

Answer 15

Angle of the mouth

Question 16

Describe the action of the bucinator.

Answer 16

Compresses cheeks

Question 17

Describe the innervation of the bucinator.

Answer 17

Buccal branches of the facial nerve

Question 18

Describe the blood supply of the bucinator.

Answer 18

Buccal artery

Question 19

Describe the origin of the platysma.

Answer 19

Pectoral fascia

Question 20

Describe the insertion of the platysma.

Answer 20

Inferior border of mandible and adjacent muscles

Question 21

Describe the action of the platysma.

Answer 21

Tenses skin of neck; depresses mandible

Question 22

Describe the innervation of the platysma.

Answer 22

Cervical branch of the facial nerve

Question 23

Describe the blood supply of the platysma.

Answer 23

Submental and suprascapular arteries

Question 24

Describe the origin of the orbicularis oris muscle.

Answer 24

Modiolus of angulus oris and vermillion line.

Question 25

Describe the insertion of the orbicularis oris muscle.

Answer 25

Skin and fascia of lips.

Question 26

Describe the action of the orbicularis oris muscle

Answer 26

Compresses and protrudes lips

Question 27

Describe the innervation of the orbicularis oris muscle.

Answer 27

Buccal and marginal mandibular branches of facial nerve

Question 28

Describe the blood supply of the buccinator

Answer 28

Superior and inferior labial, infraorbital and transverse facial arteries.

Question 29

Describe the origin of the orbicularis oculi muscle.

Answer 29

Nasal part of frontal bone, frontal process of maxilla, medial palpebral ligament, posterior lacrimal crest of lacrimal bone.

Question 30

Describe the insertion of the orbicularis oculi muscle

Answer 30

Lateral palpebral raphe, adjacent muscles and overlying subcutaneous tissue

Question 31

Describe the action of the orbicularis oculi muscle.

Answer 31

Closes eyelids and compresses lacrimal sac,

Question 32

Describe the innervation of the orbicularis oculi muscle.

Answer 32

Temporal and zygomatic branches of facial nerve.

Question 33

Describe the blood supply of the orbicularis oculi muscle.

Answer 33

Facial, superficial temporal, maxillary, and ophthalmic arteries.