Pterygopalatine Fossa & Nasal Cavity

Question 1

Passage, Blood Supply & Innervation to:

Maxillary Sinus

Answer 1

Middle Meatus (posterior part of Semilunar Hiatus @ Mexillary Ostium (below Ethmoid Bulla)

Superior alveolar branches & Greater palatine a.
(of Maxillary A.)

Superior alveolar branches

Question 2

Passage, Blood Supply & Innervation to:

Ethmoid Sinus

Answer 2

Superior Meatus

Ethmoidal aa. (from ophthalmic a.)

Nasociliary nerves (CN V1)

Question 3

Passage, Blood Supply & Innervation to:

Sphenoid Sinus

Answer 3

Sphenoethmoid Recess

Posterior ethmoidal a. (from ophthalmic a.)

Posterior ethmoidal nerve (from nasociliary n.)

Question 4

Passage, Blood Supply & Innervation to:

Frontal Sinus

Answer 4

Middle Meatus

Supraorbital a., & Anterior ethmoidal aa. (ophthalmic a.)

Supraorbital nerves (CN V1)

Question 5

Passage to Nasolacrimal Duct

Answer 5

Inferior Meatus

Question 6

Boundaries of Pterygopalatine Fossa

Answer 6

Anterior = maxillary tuberosity
Posterior = pterygoid process of sphenoid (lateral plate)
Medial = perpendicular plate of palatine bone
Lateral = opens into infratemporal fossa via pterygomaxillary fissure Roof = (incomplete) greater wing of sphenoid
Floor = pyramidal process of palatine bone

Question 7

What are the contents to the Pterygopalatine Fossa (3)?

Answer 7

Maxillary N. (V2)
Pterygopalatine Ganglion
Third part (Pterygopalatine part) of Maxillary A.

Question 8

Third part (Pterygopalatine part) of Maxillary A.

Branches and Distributions

Answer 8

Descending palatine a.
Greater palatine A. (Hard Palate)
Lesser palatine A. (Soft palate, palatine tonsil, pharyngeal wall)

Posterior-superior alveolar a. (Maxillary molars, maxillary sinus, gingiva)

Infraorbital a. (Maxillary alveoli)

Artery of pterygoid canal

Sphenopalatine a.
Lateral posterior nasal aa. (Lateral wall of nasal cavity, choanae)
Posterior septal branches (Nasal septum)