Nasal Cavity Anatomy

Question 1

what is the medial wall of the nasal cavity?

Answer 1

nasal septum

Question 2

what forms the posterior inferior portion of the nasal septum?

Answer 2

vomer bone

Question 3

what forms the superios portion of the nasal septum

Answer 3

perpendicular plate of the ethmoid bone

Question 4

what forms the anterior portion of the nasal septum

Answer 4

septal cartilage

Question 5

name the three concha of the lateral wall of the nasal cavity

Answer 5

superior middle and inferior concha

Question 6

where does the neurovasculature travel to get into the nasal cavity?

Answer 6

sphenpalatine foramen

Question 7

name the four bones surrounding the nasal cavity that make up the paranasal sinuses

Answer 7

maxillary frontal ethmoid and sphenoid sinuses

Question 8

name the four sinuses

Answer 8

frontal
maxillary
ethmoid cell
sphenoid

Question 9

where do the sinuses drain?

Answer 9

all drain into the nasal cavity with ciliary beating

Question 10

name the four passages into the lateral wall of the nasal cavity

Answer 10

sphenoethmoidal recess
superior meatus
middle meatus
inferior meatus

Question 11

what drains in the sphenoethmoidal recess

Answer 11

sphenoid sinus

Question 12

what drains in the superior meatus

Answer 12

posterior ethmoidal sinuses

Question 13

what drains in the middle meatus

Answer 13

frontal sinus, maxillary sinus, remaining ethmoid sinuses

Question 14

what drains in the inferior meatus

Answer 14

nasolacrimal duct…tears…why you get runny nose when crying

Question 15

why is tooth ache common with maxillary sinusitis?

Answer 15

roots of the molars sit right in the maxillary floor so when maxillary gets filled it puts pressure on the roots of the teeth

Question 16

what is the third branch of the external carotid?

Answer 16

facial artery

Question 17

which two branches of the external carotid feed the nasal area?

Answer 17

facial and maxillary artery

Question 18

what is the terminal branch of the maxillary artery that feeds nasal cavity and what is the other branch of the maxillary that feeds?

Answer 18

the sphenopalatine artery

greater palatine artery

Question 19

what is the branch of the internal carotid that feeds the orbit? what is the name of these branches?

Answer 19

opthalmic artery

ethmoidal arteries

Question 20

what is the name of the point where all the arteries of the nasal cavity meet

Answer 20

Kiesselbachs plexus

Question 21

name the fifth cranial nerve

Answer 21

trigeminal nerve

Question 22

what is the main role of the trigeminal nerve

Answer 22

sensation of the facial regions

Question 23

how many branches does the trigeminal nerve have

Answer 23

3

Question 24

name the three trigeminal divisions

Answer 24

opthalmic
maxillary
mandibular

Question 25

which two branches of the trigeminal innervate the nasal cavity

Answer 25

opthalmic and maxillary..but mainly maxillary

Question 26

what are the three sources of innervation to the nasal cavity

Answer 26

``` olfactory nerve (I) trigeminal nerve (V) autonomic innervation ```

Question 27

what are the two sources of sensory innervation in the nasal cavity

Answer 27

V1-from ophthalmic division of trigeminal | V2- from maxillary division of trigeminal..posterior two thirds

Question 28

what is the name of the autonomic ganglion that is a big synapse point for parasympathetic innervation that lies posterior to the nasal cavity?

Answer 28

pterygopalatine ganglion

Question 29

name the three portions of the pharynx

Answer 29

naso oro laryngo

Question 30

which of the portions of the trigeminal nerve serve the anterior third of the nasal cavity?

Answer 30

opthalmic division or V1

Question 31

which of the portions of the trigeminal nerve serve the posterior 2/3 of the nasal cavity?

Answer 31

maxillary division or V2

Question 32

describe the route of parasympathetic transmission to the nasal cavity

Answer 32

the pre ganglionic nerves travel on the greater petrosal nerve, a part of the facial nerve or CN VII, and then pass through the pterygoid canal and synapse in the pterygopalatine ganglion just posteriorly to the nasal cavity. The post gang then rides along the Maxillary division of the trigeminal nerve to innervate glands in the nasal cavity

Question 33

what is the greater petrosal nerve? why is it important for the nasal cavity?

Answer 33

it is a portion of the facial nerve and part of the parasympathetic division of nasal cavity control rides along it

Question 34

where do preganglionic sympathetic nerves that are going to nasal cavity synapse?

Answer 34

the superior cervical ganglion

Question 35

what do the post gang sympathetic nerves serving the nasal cavity travel along before reaching the nasal cavity? what do they eventually form?

Answer 35

internal carotid artery the deep petrosal nerve

Question 36

what is the vidian nerve? describe what it consists of?

Answer 36

the vidian nerve lies in the pterygoid canal and is made up of the great petrosal nerve and the deep petrosal nerve remember the deep petrosal nerve is the sympathetic control of the nasal cavity and the greater petrosal nerve is the parasympathetic control of the nasal cavity

Question 37

what is a vidian neurectomy and when do you do it?

Answer 37

when you snip the vidian nerve if someone has a chronic runny nose

Question 38

what are the boundaries of the nasopharynx?

Answer 38

behind the nasal cavity and above the soft palate

Question 39

what are the four important parts of the nasopharynx?

Answer 39

opening of eustachian tubes pharyngeal tonsils or adenoids torus tubarius pharyngeal recess

Question 40

what is the torus tubarius that lies within the nasopharynx?

Answer 40

a mucosa covered bulge that is from the end of the eustachian tube

Question 41

what is the pharyngeal recess that lies within the nasopharynx?

Answer 41

this is a deep slit like recess that lies posteriorly in the nasopharynx

Question 42

what can often occur in the pharyngeal recess?

Answer 42

cancerous growths

Question 43

name the two muscles that open the eustachian tubes

Answer 43

levator veli palatini | tensor veli palatini

Question 44

what are the two roles of the levator veli palatini and the tensor veli palatini?

Answer 44

they both help open the eustachian tubes and also lift the palate when swallowing to ensure no food goes into the nasopharynx