Nose

Question 1

What are the special sensory, general sensory, and parasympathetic innervations of the nasal cavity.

Answer 1

Special sensory: Olfactory nerve for smell.

General sensory: Opthalmic (nasociliary) and maxillary divisions of the trigeminal > respiratory mucosa

Parasympathetic: coming from the greater petrosal of the facial nerve going to the pterygopalatine ganglion jumping on the maxillary division and stimulating production of mucous.

Question 2

What is the blood supply to the nasal cavity?

epistaxis is?

Answer 2

Anterior:

• opthalmic artery (branch of internal carotid)
• facial artery (branch of external carotid)

Posterior:
-Sphenopalatine artery (maxillary artery) —external carotid (primary blood supply)

Question 3

Which meatus do each of these sinuses drain into?

Frontal, maxillary, ethmoid, sphenoid, nasolacrimal duct.

Answer 3

Frontal Sinus: Middle meatus

Question 4

Which pharyngeal arch forms the styloid process?

Answer 4

Arch 3

Question 5

What opening in the skull does the trigeminal nerve and its branches NOT pass through?

Answer 5

Foramen lacerum.

Question 6

Which nerve is most vulnerable during a thyroidectomy?

Answer 6

The recurrent laryngeal nerve.