The palate Flashcards Preview

Z-Anatomy > The palate > Flashcards

Flashcards in The palate Deck (38)
Loading flashcards...
1
Q

what is the hard palate made of?

A

skeletal muscle

2
Q

what is the soft palate made of?

A

skeletal muscle covered in oral mucosa

3
Q

what 4 bones make up the hard palate?

A
  • right and left maxilla

- right and left palatine bone

4
Q

what makes up the horizontal plate?

A

palatine bones

5
Q

what makes up the pyramidal process?

A

palatine bones heading back towards the pterygoid plate of the sphenoid bone

6
Q

what passes through the greater palatine foreman and what does it supply?

A

greater palatine NVB to supply hard palate

7
Q

what passes through the lesser palatine foreman and what does it supply?

A

lesser palatine NVB to supply the soft palate

8
Q

what structure sits at the anterior edge of the hard palate?

A

incisive canal

9
Q

what makes up the lateral wall of the hard palate?

A
  • medial pterygoid plate of sphenoid bone
  • pterygoid hamulus
  • palatine bone
  • palatine process of maxilla
10
Q

what makes up the medial wall of the hard palate?

A

nasal cavity

11
Q

what epithelium covers the hard palate?

A

keratinised stratified squamous epithelium

12
Q

what epithelium covers the soft palate?

A

non-keratinised stratified squamous epithelium

13
Q

what sits under the incisive canal and what runs through it?

A

Incisive papilla where the nasopalatine nerve goes through it

14
Q

what is the function of palatal rugae?

A

helps with mechanical breakdown of food

15
Q

what is the palatine raphe?

A

fusion of palatal shelves

16
Q

what causes cleft palate?

A

due to failure of lateral palatine processes to meet and fuse

17
Q

what are the complications of cleft palate?

A
  • speech
  • dental health
  • feeding
  • hearing
18
Q

what are the nerves and vessels of palate?

A
  • nasopalatine nerve (V2)
  • greater and lesser palatine arteries
  • greater and lesser palatine nerves (see photo)
19
Q

what supplies the palatal gingivae of anterior teeth & mucosa of the anterior palate?

A

branch of nasopalatine nerve - passes through incisive foramen

20
Q

what is the somatic sensory nerve supply to the anterior edge of the hard palate?

A

incisive branch of nasopalatine

21
Q

what is the lymphatic drainage of the anterior hard palate?

A

submandibular nodes > deep cervical nodes >thoracic duct

22
Q

what is the lymphatic drainage of the posterior hard palate and soft palate?

A

retropharyngeal nodes >deep cervical nodes (however some drain straight into the deep cervical nodes)

23
Q

what drains the palatine tonsil?

A

jugulo-diagastric node

24
Q

what is the uvula made of?

A

2 underlying skeletal muscles - right and left musculus uvulae

25
Q

what arch runs anterior to the tonsil and what direction does it run?

A

palatoglossal arch - runs from soft palate and inserts onto the side of the tongue

26
Q

what arch runs posterior to the tonsil and what direction does it run?

A

palatopharyngeal arch-runs from soft palate into oral pharynx

27
Q

what do the two arches make?

A

tonsiler cript

28
Q

what are the 5 pairs of muscles of the soft palate and what are their functions?

A
  • levator veli palatini (elevates palate)
  • tensor veli palatini (tenses palate)
  • musculus uvulae
  • palatoglossus (palate towards tongue)
  • palatopharyngeus (a longitudinal muscle of the pharynx)
29
Q

what are most of the muscles of the soft palate supplied by?

A

the vagus nerve

30
Q

what muscle is not supplied by vagus and what is it supplied by?

A

tensor veli palatini- (CN V3)

31
Q

Describe the palatine aponeurosis?

A
  • tensor veli palatini
  • attaches superiorly to the sphenoid bone
  • its tendon turns medially around the pterygoid hamulus & enters the soft palate
  • its tendon then flattens out within the soft palate & joins with the tendon of the opposite muscle to form the palatine aponeurosis
32
Q

where does the levator veli palatini run?

A

from petrous temporal bone to soft palate

33
Q

where does sapinopharyngeus run?

A

auditory tube to pharynx

34
Q

where does the palatopharyngeus run?

A

soft palate to pharynx posterior to palatoglossus

35
Q

what is the clinical testing for tonsils?

A

say “ahhh”

36
Q

what should happen if the nerves are functioning normally?

A

uvula should lift straight up in the midline

37
Q

what if the nerves are not functioning properly?

A

if there is unilateral nerve pathology the uvula will be pulled away from the non-functioning side by the normal side

38
Q

what are the functions of the soft palate?

A

Functions as a “trapdoor”:

  • stops food entering the nose during swallowing
  • directs air into the nose or the mouth during speech, sneezing, coughing & vomiting
  • helps to close off the entrance into the oropharynx during the gag reflex