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Old 07-17-2010
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Anatomy Nasolacrimal Duct Anatomy!

A professor wanted to demonstrate the opening of naso-lacrimal duct in the nasal cavity to his students. For that he should look in to

1) middle meatus of lateral wall of nose
2) superior meatus of lateral wall of nose
3) inferior meatus of lateral wall of nose
4) nasal septum
5) roof of nasal cavity
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Old 07-17-2010
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C-- inferior meatus for sure
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Old 07-17-2010
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lacrimal in inferior
sensory fibre of smell in superior meatus or only above it.
right????

please correct if wrong:sorry:
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Quote:
Originally Posted by Kabutar111 View Post
lacrimal in inferior
sensory fibre of smell in superior meatus or only above it.
right????

please correct if wrong:sorry:
sensory fibers of smell are in the nasal mucosa... they come from the cribriform plate... relay to olfactory bulb....
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dam is this in kaplan? i dont ever remember reading about this, what are in the middle/superior nasal conchae then?
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Originally Posted by doctorF View Post
sensory fibers of smell are in the nasal mucosa... they come from the cribriform plate... relay to olfactory bulb....
its not in all nasal mucosa????, where below superior concha or above it???
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Originally Posted by Androide89 View Post
dam is this in kaplan? i dont ever remember reading about this, what are in the middle/superior nasal conchae then?
contents of superior nasal concha include posterior ethmoidal sinus openings
contents of middle nasal concha include maxillary sinus opening, frontal sinus opening and anterior ethmoidal sinus openings
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Old 07-17-2010
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its not in all nasal mucosa????, where below superior concha or above it???
emmm...Olfactory receptor neurons are bipolar neurons with dendrites facing the interior space of the nasal cavity and an axon that passes through the cribiform plate then travels along the olfactory nerve to the olfactory bulb. The ORNs are located in the olfactory epithelium in the nasal cavity. The cell bodies of the ORNs are distributed among all three of the stratified layers of the olfactory epithelium.
Many tiny hair-like cilia protrude from the olfactory receptor cell's dendrite into the mucus covering the surface of the olfactory epithelium. The surface of these cilia is covered with olfactory receptors, a type of G protein-coupled receptor. Each olfactory receptor cell expresses only one type of olfactory receptor (OR), but many separate olfactory receptor cells express ORs which bind the same set of odors. The axons of olfactory receptor cells which bind the same odors converge to form glomeruli in the olfactory bulb.
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Old 07-18-2010
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the answer is inf. meatus for sho!!

n remember, the olfactory neurons are the only neurons that regenerates itself from time to time.
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also, unless the professor was demostrating this on cadaver or a manikin, there is no way he could reach up the sup. meatus.
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Originally Posted by doctorF View Post
contents of superior nasal concha include posterior ethmoidal sinus openings
contents of middle nasal concha include maxillary sinus opening, frontal sinus opening and anterior ethmoidal sinus openings
is that all lateral nose wall?
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Quote:
Originally Posted by Androide89 View Post
is that all lateral nose wall?
i think not the sup., but just the middle n inferior because the vomer stands in the medial of the nasi now.
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Old 07-19-2010
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@androide 89
i dont think its in kaplan i didnt see it in kaplan either
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Quote:
Originally Posted by Androide89 View Post
is that all lateral nose wall?
yes its all in the lateral wall of the nose.... remember medial wall comprises of septal cartilage... and four bones behind it... vomer, sphenoid, palatine and fourth if i m not wrong mandibular bone... meatuses and conchas are in lateral wall....
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Default not mandibular dear.

Quote:
Originally Posted by doctorF View Post
yes its all in the lateral wall of the nose.... remember medial wall comprises of septal cartilage... and four bones behind it... vomer, sphenoid, palatine and fourth if i m not wrong mandibular bone... meatuses and conchas are in lateral wall....
not mandibular, but maxillary processes that extends to the post-inferior medial wall of cavum nasi.
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Old 07-19-2010
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Quote:
Originally Posted by ecgram View Post
@androide 89
i dont think its in kaplan i didnt see it in kaplan either
do u have Netter's anatomy atlas? check his book. best illustrations with splendid colors.
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Old 07-20-2010
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Originally Posted by Seetal View Post
not mandibular, but maxillary processes that extends to the post-inferior medial wall of cavum nasi.

GODDD!! how could i make such a mistake.... obviously its maxillary process, happens at tymzzz
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Old 07-21-2010
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GODDD!! how could i make such a mistake.... obviously its maxillary process, happens at tymzzz
happens a lot with all of us actually... we're only human.
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Old 07-22-2010
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Quote:
Originally Posted by doctorF View Post
emmm...Olfactory receptor neurons are bipolar neurons with dendrites facing the interior space of the nasal cavity and an axon that passes through the cribiform plate then travels along the olfactory nerve to the olfactory bulb. The ORNs are located in the olfactory epithelium in the nasal cavity. The cell bodies of the ORNs are distributed among all three of the stratified layers of the olfactory epithelium.
Many tiny hair-like cilia protrude from the olfactory receptor cell's dendrite into the mucus covering the surface of the olfactory epithelium. The surface of these cilia is covered with olfactory receptors, a type of G protein-coupled receptor. Each olfactory receptor cell expresses only one type of olfactory receptor (OR), but many separate olfactory receptor cells express ORs which bind the same set of odors. The axons of olfactory receptor cells which bind the same odors converge to form glomeruli in the olfactory bulb.
but i read somewhere not remember now where that olfactory nerve endings are locted only over and around superior nasal concha and rest of nasal cavity is lined by mucus epithelium, so does not take much part in olfactory sensation.
someone else know something about this???
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Old 07-22-2010
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Originally Posted by Kabutar111 View Post
but i read somewhere not remember now where that olfactory nerve endings are locted only over and around superior nasal concha and rest of nasal cavity is lined by mucus epithelium, so does not take much part in olfactory sensation.
someone else know something about this???
yes u are rite. DoctorF only described the olfactory epithelium n its function but did not mention where it lies.

so.. u're both rite!
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Old 07-22-2010
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Quote:
Originally Posted by Seetal View Post
not mandibular, but maxillary processes that extends to the post-inferior medial wall of cavum nasi.
also thrs the ethmoid bone (the perpendicular plate) tht participate in the nasal septum!!
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