Nasal Cavity and Paranasal Sinuses Flashcards
anterior portion of the nasal cavity
Nasal vestibule
Posterior portion of the nasal cavity
Choanae
Divides the nasal cavities
septum
Floor of the nasal cavity
Palatine process of the maxilla and horizonal plate of the palatine bone
Roof of the nasal cavity
Cribriform plate (middle), nasal spine (anterior), nasal bone (anterior), body of sphenoid bone (posterior)
Medial wall of nasal cavity
Perpendicular plate of ethmoid (superior), vomer (posterior), nasal crests of maxilla/palatine bones, nasal spine, vomeronasal cartilage (anterior)
Lateral wall of nasal cavity
Inferior/middle/superior turbinates
What bone are the middle and superior turbinates part of?
Ethmoid
What is a turbinate called when covered in mucosa?
Conchae
Elevated portion of the lateral wall that surrounds/separates each conchae
Meatus
Space between the superior conchae and the lateral wall
Sphenoethmoidal recess
What does the inferior meatus contain?
nasolacrimal duct (anterior portion)
What does the middle meatus contain?
Middle ethmoidal air cells (make up ethmoidal bulla), semilunar hiatus, frontal sinus drainage, maxillary sinus
What does the superior meatus contain?
Posterior ethmoidal air cells,sphenopalatine foramen
What opens into the sphenoethmoidal recess?
Sphenoid sinus
Contents of sphenopalatine foramen
Nasopalatine nerve, posterior superior lateral nasal nerve, sphenopalatine artery/vein
Contents of incisive canal
Nasopalatine nerve, greater palatine artery
Contents of cribriform plate
Filaments of olfactory nerve, posterior ethmoidal artery, posterior ethmoidal nerve
Contents of nasal slit
Anterior ethmoidal artery/vein/nerve
Contents of foramen cecum
Superior sagittal sinus (frequently absent)
Contents of palatine canal
Posterior inferior lateral nasal nerves (off of greater palatine via V2)
Bones that contribute to the superior/external nose
nasal bones, frontal process of maxillae, nasal portion of the frontal bone
Branches to nasal area via ECA
Sphenopalatine artery, greater palatine artery, superior labial artery, lateral nasal artery
Branches off of sphenopalatine artery
Posterior lateral nasal branch, posterior septal branch
Branches off of ICA to the nasal area
Posterior/anterior ethmoidal artery
Anastomose of nasal arteries in the anterior portion of the septal wall
Kiesselbach’s area
Branches of V2 that innervate the nasal cavity
Nasopalatine nerve, superior lateral nasal nerve, inferior lateral nasal nerve
Branches of V1 that innervate the nasal cavity
Posterior ethmoidal nerve, anterior ethmoidal nerve (turns into the internal nasal nerve as it runs over the anterior septum)
Branches of V2 that innervate external nose
Infratrochlear nerve, external nasal branch of anterior ethmoidal nerve
Branch of V1 that innervates the external nose
Nasal branches of infraorbital nerve
Yellowish, quarter-size patch of sensory epithelium situated near the middle of the roof of the nasal cavity
Olfactory epithelium
Innervates the autonomics of the frontal nerve
Supraorbital nerve via frontal of V1
Innervates the autonomics of the ethmoidal air cells
Orbital branches via pterygopalatine ganglion
Opening of the duct in the maxillary sinus
Maxillary ostium
Innervates the mucosa of the maxillary sinus
Superior alveolar nerve
Most common site for sinusitis
Maxillary sinus
