Palate Flashcards
What spaces and structures does the palate separate?
oral cavity from nasal cavity and oropharynx from nasopharynx
What bones make up the hard palate?
the palatine process of the maxillary bone makes up the anterior 2/3 and the horizontal plate of the palatine bone makes up the posterior 1/3
What covers the hard and soft palate?
mucosa and palatine glands
What is the function of the soft palate?
to elevate during swallowing to close off nasopharynx from oropharynx
All but one of the palatine muscles are innervated by what nerve? What muscle is the exceptions and what is it’s innervation?
CN X, vagus nerve innervates all but palatine muscles except tensor veli palatini which is innervated by the medial pterygoid nerve from V3
What is the origin and insertion of levator veli palatini?
O: temporal bone and Eustachian tube cartilage
I: soft palate
What is the origin and insertion of tensor veli palatini?
O: sphenoid bone and Eustachian tube cartilage
I: soft palate
What is the origin and insertion of muscles uvulae?
O: hard palate
I: uvula
What is the origin and insertion of the palatoglossus?
O: palate
I: lateral tongue
What is the origin and insertion of the palatopharyngeus?
O: hard and soft palate
I: wall of pharynx
What is the action of levator veli palatini?
elevate and retract the palate
What is the action of tensor veli palatini?
tighten and flatten the palate
What is the action of musculus uvulae?
elevate the uvula
What is the action of palatoglossus?
sphincter of the fauces, elevates tongue
What is the action of patatopharyngeus?
elevate the pharynx
What is the fold of mucosa covering the palatoglossus muscles and what space does it form?
palatoglossal arch which forms a space called the fauces
What is the opening between the oral cavity and oropharynx?
fauces
What is the fold of mucosa covering the palatopharyngeus muscle?
palatopharyngeal arch
What is the space on the lateral wall of oropharynx between the palatopharyngeal arch and the palatoglossal arch?
tonsilar fossa
The tonsilar fossa contains what?
palatine tonsils
What supplies general sensory innervation to the palate?
palatine nerves from V2
What supplies taste innervation to the palate?
palatine nerves and greater petrosal nerve from CN 12, hypoglossal
Parasympathetic innervation to the palatine glands produces what?
secretomotor function
What is the path of parasympathetic fibers that innervate the palatine glands?
preganglionic fibers come from CN 7, facial nerve and travel along greater petrosal nerve (a branch of CN12, hypoglossal) until they reach the pterygopalatine ganglion in the pterygopalatine fossa. Here they synapse with post ganglionic cell bodies, whose fibers follow palatine nerves into the palate to innervate their target organ, the palatine glands
What supplies blood to the palate?
palatine branches of the maxillary and facial arteries
