Unit III - Palatine bones

Question 1

What are the 3 parts of the palatine bones?

Answer 1

horizontal plate

perpendicular plate

orbital process

Question 2

What attaches to the horizontal plate?

Answer 2

(1) musculus uvulae muscle
attachment: hard palate (horizontal plate of palatine bone) –> uvular mucosa
function: aids in palatopharyngeal closure
innervation: vagus n. (pharyngeal branch)
blood supply: ascending palatine and lesser palatine a.

(2) palatopharyngeus muscle
attachment: posterior hard palate (horizontal plate of palatine bone) and palatine aponeurosis –> wall of pharynx
function: elevation of pharynx and approximation of the palatopharyngeal folds
innervation: vagus n. (pharyngeal branch)
blood supply: ascending palatine, ascending pharyngeal and tonsilar a.

Question 3

What are the 3 parts of the perpendicular plate of the palatine bones of the maxilla?

Answer 3

greater palatine canal and foramen

lesser palatine canal and foramen

sphenopalatine foramen

Question 4

What is the function of the greater palatine canal and foramen?

Answer 4

transmits the greater palatine n., a., v.

Question 5

What is the function of the lesser palatine canal and foramen?

Answer 5

transmits the lesser palatine n., a., v.

Question 6

What is the function of the sphenopalatine foramen?

Answer 6

transmits the sphenopalatine a., and v. and the posterior superior nasal n.