ENT anatomy Flashcards
what are the small hairs in the nasal cavity called
vibrissae
what kind of cartilage is nasal cartilage
hyaline
what bone forms part of the roof, lateral walls and septum of the nasal cavity
ethmoid bone
what bone separates the nasal cavities from the anterior cranial fossa
cribriform plate of the ethmoid bone
what fractures can disrupt the cribriform plate of the ethmoid bone
le fort II and III
basilar skull fractures
what cells line the nasal vestibule
stratified squamous epithelium (keratinised to non-keratinised)
what 2 types of lining are found in the nasal cavity
respiratory epithelium (majority) olfactory epithelium
what cells make up respiratory epithelium
ciliated pseudo-stratified columnar epithelium with goblet cells
what is the special sensory nerve of olfaction
CN I (olfactory nerve)
olfactory pathway; receptor cells in the \_\_\_\_ \_\_\_\_ pass up through the \_\_\_\_ \_\_\_\_ synapse with the \_\_\_\_ \_\_\_\_ neurones pass along the \_\_\_\_ \_\_\_\_ to the \_\_\_\_ lobe and \_\_\_\_\_ \_\_\_\_\_
receptor cells in the olfactory epithelium pass up through the cribriform plate synapse with olfactory bulb (ganglion) neurones pass along the olfactory tract to temporal lobe and olfactory areas
what are the 3 somatic sensory nerves to the nasal cavities
anterior ethmoidal nerve
nasopalatine nerve
greater palatine nerves
what is the anterior ethmoidal nerve a branch of
the nasocilliary nerve which is a branch of CN V1
what are the nasopalatine nerve and greater palatine nerves a branch of
what do they pass through?
branch of CN V2
sphenopalatine foramen
the sphenopalatine and greater palatine arteries are branches of
maxillary artery from ECA
the superior labial artery and lateral nasal and septal branches are branches of
facial artery from ECA
anterior and posterior ethmoidal arteries are branches of
ophthalmic artery from ICA
what do you call the anastomosis between the septal branch of - superior labial - anterior and posterior ethmoidal - greater palatine - sphenopalatine arteries and where is it found?
Kiesselbach’s area (little’s)
anteroinferiorly on nasal septum
which of the nasal concha has its own bone and isn’t part of the ethmoidal bone?
inferior
what is the sensory supply of the inferior concha
CN V2
what can an untreated septal haematoma lead to
AVN of septal cartilage (relies on nutrient diffusion)
what is another name for the maxillary sinuses
antra
what is the lining of the sinuses
respiratory
where does the sphenoid sinus drain
sphenoethmoidal recess
where do the posterior ethmoidal air cells drain
superior meatus