Nasal Cavity Flashcards
Whay must we not use adrenaline-containing local anaesthetics near the nasal cartilages?
As they do not have their own blood supply and relay on diffusion from nearby blood vessles
The ethmoid bone contributes to the nasal cavities. What are the parts of the ethmoid bone?
- roof – cribriform plate and crista galli
- lateral wall – superior and middle conchae
- septum – perpendicular plate of ethmoid
What is the mucosa like in areas 1,2,& 3?
- Keratinised stratified squamous epithelium
- Respiratory epithelium
- Olfactory mucosa
How do receptors cells from olfactory bulb get to olfactory mucosa?
Pass through cribriform plate of ethmoid bone
What is the blood supply of the nasal cavity?
- Ophthalmic artery - via anterior and posterior ethmoidal arteries
- Maxillary artery -via sphenopalatine and greater palatine arteries
- Facial artery -via lateral nasal branch of facial or septal branch of superior labial artery
Where does the nasolacrimal duct drain into?
Inferior meatus of nasal cavity
What is Sinusitis?
Inflammation of the mucosa of the paranasal sinuses
Pain may be reffered to teeth
What is Kiesselbach’s (Little’s) area common for?
Epistaxis - nosebleed
What are the functions of the nasal cavities?
- Convey respiratory gases between atmosphere and nasopharynx
- special sense of smell
Which type of fracture completely separates the viscerocranium from the neurocranium?
Le fort III fracture
What type of epithelium is found in the roof of the nasal cavity?
Olfactory epithelium
Which nerve supplies somatic sensory innervation to the posteroinferior part of the nasal cavity?
CN V2
Through which feature do the receptor cells from CN I pass through to enter the nasal cavity?
Cribiform plate
From which artery do the anterior and posterior ethmoidal arteries arise?
Ophthalmic artery
From which artery does the sphenopalatine artery arise?
Maxillary
What drains into the inferior meatus?
Nasolacrimal duct
Which space drains into the sphenoethmoidal recess?
Sphenoidal sinus
The frontal sinus drains into which area within the nasal cavity?
Middle Meatus
