Hard & Soft Palate Flashcards
roof of oral cavity is formed from
hard and soft palate
anterior 2/3 of hard palate formed from
palatine process of maxilla
posterior 1/3 of hard palate formed from
horizontal process of palatine bones + overlying mucosa
what is present in hard palate that is thought to help with movement of food
palatine rugae
what is anterior to the rugae on the hard palate
incisive papilla which overlies the incisive fossa
purpose of the incisive fossa
opening of incisive canals where the nasopalatine nerve and greater palatine artery pass
what is the soft palate
muscular continuation of hard palate that separates oro- and nasopharynx and closes oropharyngeal isthmus
where are the greater and lesser palatine foramens found
posterolaterally and medial to the 3rd molar tooth
what emerges from greater palatine foramen
greater palatine nerve and vessels to the palate
what emerges from lesser palatine foramen
lesser palatine nerves and vessels to the soft palate
how is soft palate strengthened
anterior part is strengthened by palatine aponeurosis which attaches to posterior edge of hard palate between pterygoid hamuli on either side
pterygoid hamulus
feature of medial plate of pterygoid process
what is present at soft curved free margin of soft palate
uvula
what glands are present deep to the mucosa of the palate
palatine glands
function of palatine glands
secrete mucous into oral cavity
laterally, soft palate is continuous with
wall of pharynx
how is soft palate joined to tongue and pharynx
palatoglossal and palatopharyngeal arches respectively
where are the tonsils found
in the tonsillar fossa between the 2 arches
name the 2 main muscles of the soft palate
tensor veli palatini
levator veli palatini
levator veli palatini function
lifts palate up during swallowing and yawning
origin of levator veli palatini
pharyngotympanic tube and temporal bone
tensor veli palatini origin
scaphoid fossa, spine of sphenoid & pharyngotympanic tube
function of tensor veli palatini
tenses soft palate, supports levator, opens auditory tube during swallowing and yawning to facilitate pressure change
insertion of tensor and levator veli palatini
palatine aponeurosis
palatopharyngeus
origin is hard palate & palatine aponeurosis and inserts into lateral wall of pharynx
palatoglossus
extrinsic muscle of tongue but acts mainly to draw the soft palate down
musculus uvulae
inserts into uvula and origin is posterior nasal spine and palatine aponeurosis
motor control of muscles of soft palate
via vagus nerve & mandibular nerve (CN V3) - tensor veli palatini ONLY
which of the soft palate muscles is not innervated by the vagus nerve and what is it innervated by
tensor veli palatini which is innervated by mandibular nerve CN V3
blood supply of the palate
greater and lesser palatine arteries which are branches from ECA
greater palatine artery supplies
hard palate
lesser palatine artery supplies
soft palate
general sensation of palate is from
maxillary division of trigeminal CN V2
what nerve supplies hard palate
greater palatine nerve
what nerve supplies soft palate
lesser palatine nerve
what does the nasopalatine nerve supply
anterior gingiva and mucosa
course of the greater palatine artery
through greater palatine foramen to hard palate then to incisive fossa to anastomose with sphenopalatine artery and supply nasal septum
course of lesser palatine artery
lesser palatine foramen to soft palate then anastomoses with ascending palatine artery which is a branch of the facial artery
what are the fauces
space between the oral cavity and the pharynx, laterally bounded by the pharynx
what is present between the 2 arches
this is the isthmus of the fauces that contains the tonsillar fossae with palatine tonsils
what is the uvula
soft tissue projection posteriorly in oral cavity
function of uvula
helps create a seal when swallowing to prevent food / liquids entering the nasopharynx
