Paranasal Air Sinuses

What lines the paranasal air sinuses:

• Frontal air sinuses 

• Sphenoidal air sinuses

• Ethmoidal air sinuses

• Maxillary air sinuses

Respiratory epithelium

What innervates the paranasal air sinuses:

• Frontal air sinuses 

• Sphenoidal air sinuses

• Ethmoidal air sinuses

• Maxillary air sinuses

Tranches of the trigeminal nerve (CN V)

What innervates the frontal air sinus

ophthalmic nerve, V1

What innervates the sphenoidal air sinus

ophthalmic nerve, V1

What innervates the ethmoidal air sinus

ophthalmic nerve, V1

&

maxillary nerve, V2

What innervates the maxillary air sinus

maxillary nerve, V2

Borders of frontal sinus

Borders of ethmoid sinuses

What artery runs lateral to the sphenoid sinus

Internal carotid artery

Borders of sphenoid sinuses

Optic chiasm is where the optic nerves (cranial nerve II) from both eyes partially cross

Cavernous sinus is where lots of veins meet behind the eye

Borders of maxillary sinus

What is sinusitis

Inflammation of the mucosa lining the sinuses

What is FESS

Functional Endoscopic sinus surgery - uses a transnasal approach

2 routes to access the pituitary gland