8. nose, nasal cavity (lecture) 2 Flashcards
what is the nasal cavity lined with?
olfactory mucous membrane
olfaction = smell
what is respiratory mucous membrane?
pseudostratified columnar ciliated epithelium
function of respiratory mucous membrane?
- filters (mucous / cilia)
- humidifies (watery secretions)
- warms (rich blood supply)
where does nasal cavity receives drainage from?
paranasal sinuses (into middle meatus first) nasolacrimal duct (drains eye into inferior meatus first)
what are conchae also known as?
turbinates
which cranial nerve carries general sensation from the nasal cavity?
trigeminal (V1, V2)
which cranial nerve carries specific sensation to the nasal cavity?
olfactory
purely sensory: smell
what are nasal polyps?
flesh, BENIGN swellings arising from nasal MUCOSA
what do nasal polyps usually affect?
both sides of nasal cavity
how do nasal polys appear?
pale or yellow in appearance
OR
fleshy and reddened
which age group do nasal polyps normally affect?
typically > 40 years
what are symptoms of nasal polyps?
- blocked nose and watery rhinorrhoea (CSF)
- post nasal drip
- decreased smell and reduced taste
how does nasal poly suggest tumour?
unilateral polyp +/- blood-tinged secretion may suggest tumour
how can nasal polyp result in post nasal drip?
increased nasal secretions drips down the back, gets a tickling feeling at the back of throat (drains to posterior nasal cavity rather than front of nose) - causes cough
what is rhinitis?
inflammation of the nasal mucosal lining