dissection 2 muscles of mastication Flashcards
actions of masseter
elevate the mandible
protrude
actions of temporalis
elevates mandible
where does temporals insete
retromolar fossa (along coronoid)
which mastication muscles has a greater range of contraction
temporals
what is the pterygoid venous plexus
what is it connected to
network of veins in infratemporal fossa
cavernous sinus and pharyngeal venous plexus
action of lateral pteryhoid
protrude mandible
what does the long buccal nerve supply
buccal mucosa
skin over buccal membrane
what is the long buccal a branch of
v3
what does the inferior alveolar nerve supply and branches
mental nerve branch
supplies chin
incisive branch for canine/incisor teeth
supplies mandibular dentition
what does the inferior alveolar artier supply
lower dentition
divides to incisive and mental
before entering mandibular foramen gives off mylohyoud branc
where is the major blood supply to the bone of the mandible
incisor arteries (teeth and dental sockets) branch from inferior alveolar arteries
bleeding from gingiva and damage to lower jaw is from
inferior alveolar artery
bleeding fromdental sockets is from
incisor branches
actions of the medial pterygoid muscel
elevate the mandible
what does the mylohyoid nerve supply
mylohyoid
anterior belly of digastric
actions of myloyoid and anterior belly of digastric
elevation of the hyoid bone
mylohyoid also elevates floor of mouth
what does the lingual nerve supply
general sensation to the posterior 2/3 tongue
floor of mouth
gingiva, lingual side of mandibular teeth
what is prone to damage upon extraction of lower 8s
lingual nerve and IAN
effect of damage to lingual nerve
lack of sensation to floor of mouth, posterior 2/3 tongue, lingual gingiva
also loss of taste as chords tympani fibres have fused
where are IAN and lingual nerves accessible for anathesia
ramus of mandible
function of the ligaments and capsule of the TMJ
limit movement, provide proprioception
capsule seals joint space
what is the lateral pterygoid muscle attached to
articular disk
function of the articular disk
pack the joint to provide stability
what is the TMJ disk made of
fibrocartilage
what are the other ligaments of the TMJ
stylomandibular
sphenomandibualr
what foramen is the lingual nerve related to
mandibular formament
effect of calcified sphenomandubular ligament on inferior alveolar block
prevents analeptic diffusing
branches of the maxillary artery
middle meningeal artery
inferior alveolar artery
superior alveolar arteries
effect of IAN damage
loss of sensation to lower teeth
lip and chin (mental)
muscles that arise from the styloid process
styloglossus
stylopharyngeus
stylohyoid
nerve supply to stylohyoid
facial nerve
nerve supply to styloglossus
hypglossal
nerve supply to stylopharyngeis
glossopharyngeal
supra hyoid muscels
digastric
stylohyoid
geniohyoid
mylohyoid
where can the zygomatic arch move if fractured
inferior displacement due to master
most common sites for mandubalr fractures
body at the level of canine teeth
junctional body and ramus
condylar neck
what prevents the TMJ dislocating laterally
lateral ligamentn
what prevents the TMJ disolating medially
bone
what prevents the TMJ dislocating posteiroally
bone
which way is theTMJ most likely to dislocate
anteriorly
why is it important to use an aspirating syringe when doing an IAN block
check you are not injecting into a blood vessle
checking for nerves that may have been damaged on extraction of lower 8s
lingual - touch test
chords tympani - taste test
