Pterygopalatine Fossa and Nasal Cavity Wright DSA Flashcards
What are the cartilagenous parts of the nose?
- 2 lateral cartilages
- 2 alar cartilages
- septal cartilage
Every part of the nasal cavity is lined with nasal mucosa except ____.
Vestibule
What is the respiratory area of the nose?
inferior 2/3
What is the olfactory area in the nose?
Superior 1/3
- olfactory has specialized nasal mucos a that has peripheral nerve endings from CN I
What are the boundaries of the nasal cavity?
- Roof: frontal bone
- Floor: palatine process of maxilla horizontal plate of palatine bone
- Medial wall: nasal septum
- Lateral wall: superior middle inferior concha
The sphenoethmoidal recess is the opening to ___.
- Spenoethmoidal recess is opening of sphenoid sinus
What supplies most of the blood to the lateral and medial walls of the nasal cavity?
- Branches of the opthalmic artery called anterior and posterior ethmoid arteries
- Maxillary artery branches of sphenopalatine and greater palatine
- Facial artery branches supeior labial and lateral nasal branches
What is Kiesselbach’s area?
Where all five arteries of the lateral and septum wall come together into a capillary bed that can bleed profusely
Describe the Maxillary sinus?
- In maxilla- the largest
- innervation is the superior alveolar nerve
- Arterial supply is superior alveolar branches of maxillary and greater palatine
What veins drain the nasal cavity?
SPhenopalatine
Facial
Opthalmic
Ethmoid sinus innervation and arterial supply?
- Ethmoidal arterires from the opthalmic artery
- Innervation nasocilliary (V1)
Fun facts? Not sure if we need to know or not?
- anterior and middle drain into the middle meatus
- posterior drains into superior meatus
Sphenoid sinus arterial supply and nerve?
Frontal sinus?
- supraorbital artery and anterior ethmoidal artery
- Supraorbital nerves V1
Borders of the pterygopalatine fossa?
- anterior: maxillary tuberosity
- Posterior: pterygoid process of sphenoid
- Medial: perpendicular plate of palatine bone
- Lateral: opens into infratemporal fossa via pterygomaxillary fissure
- Roof: incompjlete greateer wing of sphenoid
- Floor: pyramidal process of palatine bone
Openings:
- Superior: opens into inferior orbital fissue
- Inferior: clsoed except for palatine foramen
What nerve is in the pterogopalatine fossa?
V2 Maxillary nerve which travels through Foramen rotundum
What are the contents of pterygopalatine fossa
- Maxillary nerve V2
- Pterygopalatine ganglion
- 3rd part of maxillary artery
Describe the braches to get parasympathetic fibers to the lacrimal nerve V1
- Parasympathetic fibers jump on
- maxillary nerve V2 then
- Zygomatic nerve then
- Zygomaticotemporal nerve and finally
- Lacrimal nerve (V1) (parasympathetic fibers)
What forms the nerve of the pterygoid canal?
Greater petrosal (parasymp. part) joins deep petrosal (sympathetic part) to form nerve of pterygoid canal
Infra orbital nerve travels through ___
INfraorbital fissure
Maxillary nerve travels through ___.
Foramen rotundum
Greater and lesser palatine nerves go to _____.
Greater to hard palate
lesser to soft palate
The Superior nasal meatus is the opening of ____
Ethmoidal sinus
Middle nasal meatus is the opening of _____.
Frontal sinus
Maxillary sinus opens into_____ in the posterior part of the semilunar hiatus of maxillary ostium (below ethmoid bulla)
middle nasal meatus
Inferior nasal meatus is the opening of ____.
Nasolacrimal duct
