GA: Pterygopalatine Fossa Flashcards
Nose Cartilage + Bones
What lines all of the nasal passages?
Nasal mucose
Respiratory Area = inferior 2/3
Olfactory Area = superior 1/3
What are the boundaries of the nasal cavity?
What holes are in the spheno-ethmoidal recess?
Opening of sphenoid sinus
What hole is in superior nasal meatus?
Openings of ethmoidal sinuses
What is in the middle nasal meatus?
Opening of frontal sinus
+
In semilunar hiatus –> Opening of maxillary sinus @ maxillary ostium (below ethmoid bulla)
What hole is in the inferior nasal meatus?
Opening of nasolacrimal duct
What artery supplies the nasal cavity?
Maxillary A. (Sphenopalatine A., Ethmoidal A, Greater Palatine A)
+
parts of facial A. (Superior labial A, Lateral nasal branches)
What veins drain the nasal cavity?
Sphenopalatine, Facial, + Opthalmic Veins
What is the point in the nasal cavity called where all five arteries come together in a capillary bed that can bleed profusely (nose bleeds)?
Kiesselbach area
Where is the pterygopalatine fossa found?
A small pyramid chaped space that is found inferior to the apex of the orbit
What are the borders of the pterygopalatine fossa?
What are the contents of the pterygopalatine fossa?
Maxillary nerve (V2)
Pterygopalatine gangion
3rd part of maxillary A.
How do parasympathetics travel to the lacrimal gland?
Facial N. –> Greater petrosal N. –> joins deep pretrosal N. –> form N. of pterygoid canal –> pterygopalatine ganglion –> zygomatic N. –> lacrimal gland
How do sympathetics get to the pterygopalatine ganglia?
Superior cervical ganglion –> Internal carotid plexus –> Deep petrosal N.
What arteries are in the pterygopalatine fossa?
ALL FROM MAXILLARY A.
Inferior Alveolar A.
Middle meningeal A.
Buccal A.
Infraorbital A.
What nerves are in the pterygopalatine fossa?
Infraorbital N.
Greater + Lesser palatine N.
What innervates levator and tensor veli palatine muscles
During swallowing, it contracts, elevating the soft palate to help prevent food from entering the nasopharynx. It is innervated via the pharyngeal plexus, primarily by the pharyngeal branch of the vagus nerve (CN X).
