Oral And Nasal Cavities - 4/6 Stephens

Question 1

Where do Postganglionic Symp fibers originate from in the innervation to the sublingual gland?

Fibers course through what?

Answer 1

Superior cervical ganglion

External carotid and facial plexuses
OR the sublingual plexus

Question 2

Preganglionic PS innervation to the sublingual gland originates where?

Exits with what nerve?
Travels through what nerve?
Joins what?

Synapses where?

Answer 2

Superior Salivatory nucleus

CN 7
Chorda tympani
Lingual nerve

Submandibular ganglion

Question 3

What is the line of demarcation between the anterior 2/3 and posterior 1/3 of the tongue?

Answer 3

Sulcus terminalis

Question 4

All intrinsic muscles of the tongue are innervated by CN 12 except what muscle?

What innervates it?

What is its action?

Answer 4

Palatoglossus m.

CN 10 via pharyngeal plexus

Elevates tongue and closes faucial isthmus during deglutition

Question 5

Unilateral hypoglossal palsy results in what muscle deviation?

To what side?

Answer 5

Genioglossus m.

Towards the affected side

Question 6

Action of tensor veli palatini muscle?

Innervation?

Answer 6

Tenses soft palate and opens auditory tube

CN V3

Question 7

Action of Levator veli palatini muscle?

Innervation?

Answer 7

Elevates soft palate

CN 10 via pharyngeal plexus

Question 8

Paralysis of tensor or levator palate results in what?

Answer 8

Deviation of uvula towards the normal side

Question 9

What supplies the post-incisive?

Hard palate?

Soft palate?

Answer 9

Nasopalatine

Greater palatine vessels

Lesser palatine vessels

Question 10

What must you be careful for when removing the palatine tonsil?

What bleeds during tonsillectomy?

Where does lymphatic drainage from the tonsil go?

Answer 10

CN 9

Tonsillar vein

Jugulodigastric nodes

Question 11

Where do fractures of the nose frequently occur?

Answer 11

Junction between septal cartilage and the ethmoid and vomer bones

Question 12

Where is the opening for the maxillary sinus located?

Answer 12

Posterior 1/3 of the hiatus semilunaris

Question 13

The frontal and anterior ethmoid all sinuses drain into where?

If these sinuses drain through a separate opening located anterior to the hiatus, what is this opening called?

Answer 13

Ethmoidal infundibulum

Frontal recess

Question 14

What is the blood supply to the posterior 2/3 of the nasal cavity?

What is it a branch of?

Tissue here is derived from what?

Answer 14

Sphenopalatine a.

Terminal branch of the maxillary a.

Endoderm

Question 15

What is the blood supply to the anterior 1/3 of the nasal cavity?

Tissue here is derived from what?

Answer 15

Anterior ethmoidal artery

Ectoderm

Question 16

Innervation to the post. 2/3 nasal cavity? What kind of fibers?

Anterior 1/3? Type of fibers?

Answer 16

Sphenopalatine ganglion GVA

Anterior Ethmoidal n. (branch of CN 5) GSA

Question 17

Most epistaxis occurs between the junction of the septal branches of the superior labial and sphenopalatine arteries. This region is called what?

Answer 17

Kiesselbach’s area

Question 18

The roof of the maxillary sinus is also what?

What nerve is located in this area?

Answer 18

Floor of the orbit

Infraorbital nerve

Question 19

What is the relationship of the sphenoidal sinus to adjacent structures posterior?

Superior?

Anterior?

Answer 19

pons, basilar artery

Pituitary

Nasal cavity

Question 20

What is the relationship of the sphenoidal sinus to adjacent structures inferior?

Lateral?

Answer 20

Nasopharynx

Internal carotid, V1, cavernous sinus

Question 21

Mnemonic for sphenoidal sinus relationships:

Answer 21

Alphabetical order: PSAIL

Then
PP NN CV1C

Question 22

Where does the frontonasal duct drain?

Answer 22

Ethmoidal infundibulum OR frontal recess of middle meatus

Question 23

Preganglionic Symp neurons to the lacrimal gland are found where?

Answer 23

Intermediolateral cell columns of T1-L2

Question 24

How do Postganglionic Symp fibers supply the lacrimal gland?

What else do they supply?

Answer 24

Deep petrosal n. From the internal carotid plexus joins the petrosal nerve to form the vidian nerve

Palate, nasal cavity, pharynx, orbit

Question 25

What nerve spirals around the submandibular (Wharton’s) duct from superior-lateral to inferior-medial?

Answer 25

Lingual nerve