face and orbit

Question 1

Muscles of the forehead

Answer 1

Occipitofrontalis

Question 2

Muscles of the mouth and lips

Answer 2

Obicularis oris, mentalis and buccinator

Question 3

Muscles around the orbit

Answer 3

Obicularis oculi

Question 4

Muscles around the nose

Answer 4

Nasalis and procerus

Question 5

Muscles of the cheeks

Answer 5

Zygomaticus major, zygomaticus minor, risorius and playtsma

Question 6

What nerve innervates the skin of the anterior face and scalp?

Answer 6

CNV; trigeminal n

Question 7

What nerves innervate the skin of the posterior scalp?

Answer 7

Spinal nerves C2 and C3

Question 8

What nerve innervates the muscles of facial expression?

Answer 8

CN VII; facial nerve

Question 9

What does the motor component of CN V do?

Answer 9

Innervate muscles of mastication

Question 10

3 divisions of the trigeminal nerve

Answer 10

Ophthalmic (V1), Maxillary (V2), Mandibular (V3)

Question 11

The cervical nerves coming from C2 and C3 also provide sensory innervation to where?

Answer 11

The scalp

Question 12

5 terminal branches of the facial nerve (CN VII)

Answer 12

Temporal, zygomatic, buccal, marginal mandibular and cervical

Question 13

Bells Palsy

Answer 13

Paralysis of one side of the face; common in pregnancy

Question 14

S/S of bells palsy

Answer 14

Difficulty eating and closing eyes, drooling, dry eyes and speech difficulty

Question 15

Arteries of the face

Answer 15

Derived from the external carotid arteries; include the facial, superficial temporal and transverse facial arteries

Question 16

Facial artery

Answer 16

Major artery that supplies the face; goes up toward the nose, eyes and mandible

Question 17

Superficial temporal artery

Answer 17

Anterior to the ear, in the temple region

Question 18

Transverse facia artery

Answer 18

Superficial to masseter; anastomoses with facial artery

Question 19

Vasculature of the face; Veins

Answer 19

Follows the arterial system

Question 20

Lymphatic drainage of the face

Answer 20

All lymph from head and neck drain into the deep cervical lymph nodes

Question 21

What does the orbit include?

Answer 21

Bones, eyelids, muscles, nerves and vessels, fascia, conjunctiva and lacrimal structures

Question 22

7 muscles of the orbit

Answer 22

Levator palpebrae superioris, 4 recti muscles and 2 oblique muscles

Question 23

What does the levator palpebrae superioris do?

Answer 23

Elevates superior eyelid

Question 24

Levator palpebrae superioris nerve

Answer 24

CN III (oculomotor nerve)

Question 25

Superior rectus

Answer 25

Elevates and adducts eye

Question 26

Inferior rectus

Answer 26

Depresses and adducts eye

Question 27

Medial rectus

Answer 27

Adduction

Question 28

Lateral rectus

Answer 28

Abduction

Question 29

Superior oblique

Answer 29

Abducts and depresses eye

Question 30

Inferior oblique

Answer 30

Abducts and elevates eye

Question 31

Innervations of the muscles of the orbit

Answer 31

LR6, SO4, AR3

Question 32

Lateral rectus =

Answer 32

abducens n

Question 33

Superior oblique =

Answer 33

trochlear nerve

Question 34

All the rest =

Answer 34

oculomotor nerve

Question 35

CN III Injury; Down and Out

Answer 35

Ptosis = droopy eyelid and weakness of levator palpebrae superioris

Question 36

Trochlear nerve injury

Answer 36

Elevated and adducted position of the eyeball; unopposed action of the inferior oblique (oculomotor n CNIII)

Question 37

Abducens nerve injury

Answer 37

Adducted eyeball; unopposed action of the medial rectus muscle (oculomotor n CNIII)