oral cavity & submandibular region Flashcards
what is included in the oral region
oral cavity cheeks and lips teeth and gingivae tongue tonsils salivary glands palate
what makes up the oral cavity
oral cavity proper and vestibule
what are the boundaries of the oral cavity
lateral/anterior- teeth gums
superior- hard/soft palate
inferior- floor of mouth
posterior- fauces
what is the vestibule of oral cavity
space between lips/cheeks and teeth
opens externally at the oral fissure between lips
mm of facial expression controling shape and size of oral fissure
parotid duct opens into vestibule opposite to upper 2nd molar
What are the external and internal structure of lips
externally- covered by skin
internally covered by mucus membrane
what are the mm of facial expression
orbicularis oris levator labii superioris levator anglui oris zygomaticus risorius levator labii superioris alaeque nasi depressor anguli oris depressor labii inferioris mentalis
what mm controls frowning
depressor labii inferioris, anguli oris
what mm elevate the upper lip
levaor labii superioris
levator anguli oris
zygomaticus major and minor
levator labii superioris alaeque nasi
what m protrudes lower lip
mentalis
what m flares nostrils
levator labii superioris alaeque nasi
what m causes a wide smile
risorius
what inn the upper lip
V2 via infraorbital branches
what inn lower lip
v3 via mental and buccal branches
describe lymph drainage of oral cavity
submental lymph nodes from medial part lower lip
submandibular lymph from all other regions
How many teeth do we have
32 permanent 16 deciduous(baby teeth)
describe the names of teeth
incisors-4 canine-12 and premolars-4 molars-6
What is the gingivae
mucus membrane and fibrous tissue attached to the alveolar processes of the mandible and maxilla bones, also attached to neck of teeth
what inn the teeth
maxillary teet from superior alveolar branches of V2
mandibular teeth from inferior alveolar branches of V3
What inn the maxillary gingivae
palatine portion by nasopalatine and greater palatine n from V2
vestibular portion from superior alveolar branches of V2
what inn the mandicular gingivae
internal from lingual n V3
external from buccal and inferior alveolar n, mental branch V3
describe lymph drainage of teeth
submandibular lymph nodes
mandibular incissors drain to submental lymph
3rd maxillary molars drain to superior deep cervical lymph
What part of the tongue is immobile
posterior 1/3 because anchored to mandible, hyoid and syloid process
what are the external features of the tongue
terminal sulcus
foramen cecum
median sulcus
median and lateral glossoepiglottic folds
epiglottic vallevulae
papillae- vallate, filiform (no taste buds), fungiform, foliate, lingual tonsils
frenulum of tongue
What are the intrinsic mm of tongue
longitudinal
vertical
transverse
what mm allow for tongue to curl
longitudinal
what are the extrinsic mm of tongue
genioglossus, hyoglossus, styloglossus, palatoglossus
o i action inn genioglossus
o: mental spine of mandible
i: dorsum of tongue from apex to hyoid
inn: hypoglossal n
bilateraly protrudes tongue, acting unilateral and pushed tongue to opp side
o i action and inn hyoglossus
o: hyoid bone
i: inferolateral side of tongue
inn: hypoglossal n
action: retracts, depresses tongue
o i action and inn styloglossus
o: styloid process
i: superolateral side of tongue
inn: hypoglossal n
action: retracts, elevates tongue
o i inn action palatoglossus
o: soft palate
i: tongue
inn: vagus
action: pulls tongue and soft palate together during swallowing
what is the motor inn to tongue
hypoglossal n GSE to all mm except palatoglossus
Vagus n SVE to palatoglossus
what are signs in someone who has damage to hypoglossal
tongue deviates toward lesioned side because genioglossus m push tongue contralaterally
What is the sensory inn of tongue
Anterior 2/3 GSA lingual branch V3, taste SVA facial via chorda tympani
posterior 1/3 GVA IX, SVA taste IX
what is the sensory inn of epiglottic region
GVA internal laryngeal branch X
SVA taste superior laryngeal branch of X
Blood supply of tongue
lingual a
what are the branches of lingual a
dorsal lingual a (posterior tongue/palatine tonsil) sublingual a (floor of mouth) deep lingual a (anterior tongue)
describe venous drainage of tongue area
lingual cc drain to internal jugular v
venae comitantes hypoglossi drain floor and parallel course of hypoglossal n to end in common facial v
describe lymph drainage of tongue area
posterior 1/3- superior deep cervical lymph nodes (bilateral) anterior 2/3: lateral- submandibular ipsi middle- inferior deep cervical nodes b/l apex- submental (medial portion b/l)
What tonsils make up Waldeyer’s ring
lingual tonsils
pharyngeal tonsils
palatine tonsils
tubal
where are lingual tonsils
deep to mucosa of posterior 1/3 tongue
where are pharyngeal tonsils
in pharyngeal recess of nasopharynx
where are palatine tonsils
located at opening of oropharynx between arches
wehre are the tubal tonsils
opening of auditory tube
what are adenoids
inflamed pharyngeal tonsils
What n wraps around the submandibular duct
the lingual n
what mm does the submandibular duct run between
mylohyoid and hyoglossus
descirbe PAN to parotid gland
salivatory nucleus IX -tympanic branch- lesser petrosal otic ganglion auriculotemporal branch V3 secretomotor and stimulates gland secretion
the postgang fibers SAN to parotid run with what
external carotid nerve
describe PAN to submandibular sublingual glands
salivatory nucleus VII -chordatympani joins with lingual submandibular ganglion lingual branch V3 secretomotor and stimulates salivation
describe submandibular ganglion
suspended form lingual nerve within posterior floor oral cavity
has postgang cell bodies PAN
inn glnds
where do SAN posganglionc fibers run to submandibular and sublingual glands
external carotid n
what are the boundaries of the submandibular region
infeiror- anterior and posterior bellies of digastric m
superior- mandible
roof- cervical investing fascia
floor- mylohyoi dm
what are the contents of the submandibular region
submandibular gland, facial a, XII, suprahyoid mm
what are the suprahyoid mm
digastric, stylohyoid, mylohyoid and geniohyoid
o i inn action digastric
o: ant belly on digastric fossa mandible. post belly on mastoid notch temporal bone
i: hyoid
inn: ant V3, post VII
depresses mandible and elevates hyoid
o i inn action stylohyoid
o: styloid process
i: hyoid
VII
elevates and retracts hyoid
o i action inn mylohyoid
o: mylohyoid line of mandible
i: midline raphe and hyoid
inn: mylohyoid branch of V3
elevates hyoi and floor of mouth, assists with opening mouth
o i action inn geniohyoid
o: mental spines of madible
i: hyoid
inn: C1 via hypoglossal
elevates hyoid
when hyoid is fixed, opens mouth
what are the branches of lingual a
dorsal lingual (posterior tongue) sublingual a (floor of mouth) deep lingual a (anterior tongue)
where do the lingual vv drain to
internal jugular v
describe venae comitatntes hypoglossi
parallel hypoglossal n and end in common facial v
how do sublingual drugs work
absorbed right into lingual vv which go to internal jugula v, rapid absorption
how do sublingual drugs work
absorbed right into lingual vv which go to internal jugula v, rapid absorption
What nn inn oral cavity
lingual n, hypoglossal n, glossopharyngeal n, vagus
describe course of lingual n
runs between hyoglossus and mylohyoid mm then wrap around submandibular duct and pierce tongue laterally
GSA to floor mouth, and ant 2/3 tongue
describe information that runs in lingual but is not from V3
SVA via chorda tympani
GVE-P via chorda tympani
where does hypoglossal n run compated to occipital a
runs lateral to it
what type of info is in hypoglossal n
GSE- extrinsic tongue mm (except palatoglossus)
GSE- intrinsic tongue mm
where does IX course
passes between superior and middle constrictors , pierces tongue posteriorly
what type of info runs in IX
GVA posterior 1/3 tongue
SVA posterior 1/3 tongue
what branch of vagus enters oral cavity posteriorly
internal branch superior laryngeal n
what info is carried in internal laryngeal n
GVA epiglottic region
SVA epiglottic region
