13 - Oral & Nasal Cavities - Stephens Flashcards
where is the vestibule?
between the gums and the cheek
what supplies blood to posterior 2/3 of nasal cavity?
sphenopalatine artery
what nerve spirals around the submandibular duct? in what direction?
lingual n; superior lateral to inferior medial
where is the sublingual gland located?
superior surface of mylohyoid m.
what provides blood to sublingual gland?
sublingual branch of the lingual artery
how is sublingual gland innervated?
autonomics, same as SM gland
what will damage to the mylohyoid cause?
sagging of one side of the floor of the mouth (if unilateral)
postganglionic sympathetic fibers to the sublingual gland travel thru what plexus?
facial or sublingual plexus*
innervation of intrinsic muscles of tongue?
hypoglossal
what does the sulcus terminalis divide?
ant 2/3 and post 1/3 tongue: ectoderm/endodermal origin
m. of tongue not innervated by hypoglossal n?
platoglossus
what are the symptoms of unilateral hypoglossal palsy?
paralysis, atrophy, and fasciulations of intrinsic m. of tongue; genoglossus m. will deviate tongue toward effected side “lick your wounds”
what does bilateral hypoglossal palsy present as?
dyspnea, dysarthria, dysphagia
where does all lymph of head and neck drain into?
deep cervical LN
what supplies blood to tongue?
lingual artery (and terminal branch: profunda lingual a.)
what is the muscularis uvulae innervated by?
X from pharyngeal plexus
what innervates the tensor palati?
small branch of mandibular n (V3)
function of tensor veli palatini?
tenses soft palate and opens auditory tube
what innervates the levator veli palatini?
vagus n.
function of levator palatini?
elevates the palate…. :)
what happens when there is paralysis of the tensor or levator palate?
allows non-paralyzed side to pull or deviate uvula towards the normal side
what do the greater palatine vessels supply?
post-incisive hard palate
what do the lesser palatine vessels supply?
soft palate
what supplies blood to the palatine tonsil?
the palatine branch of the ascending pharyngeal a.
what nerve is closely associated with the floor of the tonsillar fossa?
glossopharyngeal n.
where to fractures of the nose frequently occur?
junction between septal cartilage and the ethmoid and vomer bones
what direction to cartilaginous fragments tend to move (telescope) in nose fracture?
posteriorly
what portion of the nasal cavity is lined with hairs?
vestibule
what portion of the nasal cavity has passive drainage?
anterior 1/3; posterior 2/3 is active
which conchae condition air with swell bodies?
middle and inferior
where are the swell bodies (histo)?
in the lamina propria
what is the ethmoidal bulla?
bony eminence overlying middle ethmoidal air cells (multiple openings onto it)
what does the hiatus semilunaris have in it?
opening for maxillary sinus in posterior 1/3 (onto inferior concha)
where do the frontal and ethmoidal sinuses drain?
ethmoidal infundibulum
where is the nasolacrimal duct located?
inferior meatus; 1cm posterior to anterior edge of concha
what is Kiesselbach’s area? why is it important?
junction of septal branches of superior labial and sphenopalatine arteries; majority of nasal hemorrhages or (epitaxis) occur here
what provides blood to anterior 1/3 of nasal cavity?
anterior ethmoidal artery
what provides innervation to anterior 1/3 of nasal cavity?
anterior ethmoidal n.
what provides innervation to posterior 2/3 of nasal cavity?
branches of spenopalatine ganglion
what is superior to the sphenoidal sinus? inferior?
pituitary; nasopharynx
what is posterior to sphenoidal sinus? anterior?
pons & basilar a.; nasal cavity
what structures are lateral to the sphenoidal sinus?
internal carotid, V1, cavernous sinus
