Anatomy

Question 1

What nerve in the parotid area is affected in Frey’s syndrome?

Answer 1

Auriculotemporal branch of cranial nerve V

Question 2

What occurs w/ injury to the buccal nerve?

Answer 2

Decreased sensation of the skin over the cheeks (not to be confused with buccal branch of the facial nerve)

Question 3

What happens with injury to the mental nerve?

Answer 3

Decreased sensation to the front of the chin and lower lip

Question 4

What is the function of the zygomaticofacial and zygomaticotemporal nerves?

Answer 4

Sensory nerves that supply sensation to the zygomatic arch and upper cheek

Question 5

In what direction do lymphatics tend to drain?

Answer 5

Medial to lateral, and cephalad to caudad

Question 6

What areas do the postauricular lymph nodes drain?

Answer 6

Posterior ear, parietal and mastoid scalp

Question 7

What lymph node basin would the pre-auricular or anterior ear drain to?

Answer 7

Parotid or preauricular basin

Question 8

Where does the occipital scalp drain to (lymph node basin)?

Answer 8

The occipital basin

Question 9

Where does the nasal sidewall drain to (lymph node basin)?

Answer 9

Submental basin

Question 10

What nerves innervate the orbicularis oculi muscle?

Answer 10

Temporal and superior zygomatic (upper portion) and the inferior zygomatic and buccal branches of the facial nerve (inferior portion)

Question 11

What nerve innervates the frontalis muscle?

Answer 11

Temporal branch of the facial nerve

Question 12

What muscles does the buccal branch of the facial nerve innervate?

Answer 12

Risorius, buccinator, levator muscles of the mouth, nasalis, orbicularis oris, and procerus

Question 13

What muscles does the marginal mandibular branch innervate?

Answer 13

Depressor labii inferioris, depressor anguli oris, and mentalis

Question 14

What muscles does the zygomatic branch innervate?

Answer 14

• Obicularis oculi
• Zygomaticus major
• Zygomaticus minor

Question 15

What is the innervation of the conchal bowl?

Answer 15

Cranial nerves VII, IX, and X (ring blocks wont get this area)

Question 16

What sensory nerve innervates the majority of the posterior ear?

Answer 16

Greater auricular nerve

Question 17

What nerve innervates the majority of the helix/antihelix?

Answer 17

The greater auricular nerve (the auriculotemporal nerve is the upper quadrant of the ear if looking at it head-on…area medial to the mid superior helix and above the mid tragus)

Question 18

A ring block around the ear will numb all of the ear except for what?

Answer 18

The external auditory canal and the concha

Question 19

What muscle leads to “bunny lines”? What is its innervation?

Answer 19

Procerus, innervated by zygomatic branch of the facial nerve

Question 20

What is the primary muscle that moves the eyebrows up and down? What is its innervation?

Answer 20

Frontalis muscle

Question 21

What muscles are primarily involved in scowling and what is their innervation?

Answer 21

Corrugator supercilii, innervated by the temporal branch of the facial nerve

Question 22

What muscles are the main contributors to smile and what is the innervation?

Answer 22

Zygomaticus major/minor and

Major: Buccal and zygomatic branches

Minor: just buccal branch of facial nerves

Question 23

What muscle closes the eyelid?

Answer 23

Obicularis occuli (upper portion), innervated by the temporal branch of the facial nerve

Question 24

What is the innervation of levator palpebrae superioris muscle and its innervation?

Answer 24

Elevate the eyelid (involved in ptosis if botox diffusion gets to it), innervated by CN III

Question 25

What muscles does the trigeminal nerve innervate?

Answer 25

Muscles of mastication: Masseter, temporalis, medial and lateral pterygoid

Question 26

The function can come back after injury to which branches of the facial nerve?

Answer 26

Buccal and zygomatic (have extensive rami and cross innervation)

Question 27

What is the innervation of the procerus muscle?

Answer 27

Zygomatic branch of the facial nerve

Question 28

What nerve from the cervical plexus innervates the anterior neck?

Answer 28

Transverse cervical

Question 29

What nerve from the cervical plexus innervates the anterior and posterior lobules of the ear and the skin over the mastoid process?

Answer 29

The greater auricular nerve

Question 30

What nerve innervates the lateral arch of the plantar foot?

Answer 30

The sural nerve (plantar)

Question 31

What nerve innervates the medial upper quadrant of the plantar surface of the foot and the medial 3 toes (big, second and half of 3rd) on the plantar surface?

Answer 31

The medial plantar nerve, which is a terminal branch of the posterior tibial nerve

Question 32

What nerve is susceptible to injury from surgeries on the lateral leg?

Answer 32

The common peroneal nerve as it wraps superficially around the head of the fibula

Question 33

Which muscle supplied by facial nerve VII is the only one that is supplied from the superficial side of the muscle rather than the deep side?

Answer 33

Buccinator

Question 34

What nerve supplies the heel of the foot?

Answer 34

The calcaneal nerve, branch of the posterior tibial nerve

Question 35

What 3 nerves must be blocked for a nerve block of the plantar foot?

Answer 35

Posterior tibial (just behind the medial malleolus), sural nerve (posterior to the lateral malleolus), and saphenous (above the medial malleolus)

Question 36

What nerve innervates the majority of the dorsal skin on the foot?

Answer 36

Superficial peroneal (fibular) nerve

Question 37

Which nerve supplies sensation to the tragus of the ear?

Answer 37

Auriculotemporal

Question 38

What nerve supplies innervation to the posterior lateral portion of the dorsal foot and lateral malleolus?

Answer 38

Saphenous nerve

Question 39

What muscles are innervated by the temporal branch of the facial nerve?

Answer 39

Frontalis, orbicularis oculi, corrugator supercilii

Question 40

Which of the named facial vessels are derived from the internal carotid artery?

Answer 40

Supratrochlear, supraorbital, palpebral, dorsal nasal, lacrimal arteries (branches of the ophthalmic artery which comes from internal carotid artery... others (angular for example) are from the external carotid artery

Question 41

Where would an anesthetic be placed for a median nerve block?

Answer 41

Between the bodies of the flexor digitorum superficialis and the flexor digitorum produndus