Nasal Cavity II Flashcards
What are the three paranasal sinuses?
Maxilla - Frontal - Sphenoid
Where is the sphenoid sinus located?
Within the presphenoid bone
Why are infections common in the paranasal sinus?
Because the foramen to drain these cavities doesn’t allow passive drainage when animal is in normal posture
Why do the molars cause a problem with the maxillary sinus?
Roots grow into the sinus
Transfer infection
Can damage when those teeth are removed
What are the two basic parts of the palate?
Hard palate
Soft palate
What two foramen are within the palatine bone?
Major and minor palatine foramen
Where is the incisive papilla?
Raised bump directly caudal to the central incisors
What does the palatinus muscle do?
Shortens and ventrally curls palate
What is the origin of the levator veli palatini?
Muscular process of the temporal bone
What is the insertion of the levator veli palatini?
Dorsal surface of the soft palate
What nerve innervates the levator veli palatini?
Branch of the pharyngeal plexus
Mostly CN X and some CN IX
What is the action of the levator veli palatini?
Elevate soft palate
What is the origin of the tensor veli palatini?
Muscular process of the temporal bone
What is the insertion point of the tensor veli palatini?
Lateral soft edge of the soft paalte after wrapping around pterygoid hamulus
What nerve innervates the tensor veli palatini?
Mandibular nerve
What is the action of the tensor veli palatini?
Tense the soft palate
What does the palatoglossus m. do?
From the lateral aspect of the palate to the tongue
What do the palato. muscles form bilaterally?
Palatoglossal arch
What is present within the tonsilar fossa?
Palatine tonsil
What are the three major palatine arteries?
Descending - Major - Minor
What is the path of the minor palatine artery?
Passes caudual to the margin of the hard palate to reach the soft palate
What is the path of the major palatine artery?
Enters caudal palatine foramen and passes through the canal to reach hard palate
What happens to the rostral branch of the major palatine artery?
Runs through the palatine groove to the palatine fissure and gives off branch to nasal cavity
What happens to the caudal branch of the major palatine foramen?
Exits the minor palatine foramen and forms an anastomosis between major and minor palatine arteries
What branches come off the maxillary and that supply sensory to the palatine mucosa?
Major palatine - Accessory palatine - Minor palatine
