muscles of mastication Flashcards
muscles of mastication innervation
mandibular nerve (V3)
elevates and retracts mandible
temporalis and masseter
temporalis originates at ___ and inserts on ____
temporal fossa
coronoid process of mandible
masseter originates at ____ specifically the ___ of zygomatic bone and inserts on ____
zygomatic arch
maxillary process
angle and lateral surface of mandible
triangular 2 headed muscle
lateral pterygoid
1 head of lateral pterygoid originates from ___ and the other head originates from ____ both insert on ____
base of skull
lateral surface of lateral pterygoid plate
joint capsule and articular disc of TMJ and condyloid process of mandible
bilateral: protrude mandible and initiates jaw opening
lateral pterygoid
unilateral: lateral mandible movements
lateral and medial pterygoid
quadrangular two headed muscle
medial pterygoid
1 head of medial pterygoid originates from ___ and the other head originates from ____ both heads insert on ____
medial surface of lateral pterygoid plate
maxilla
medial surface of ramus of mandible
mirror image of masseter
medial pterygoid
bilateral: elevate and protrudes mandible
medial pterygoid
depression of mandible involves ___ and ___ and ___ when resistance is involved
gravity
suprahyoid
infrahyoid
elevation of mandible involves ___, ___, and ___
temporalis
masseter
medial pterygoid
retraction of mandible involves ____ and ____
posterior fibers of temporalis
masseter
protrusion of mandible involves ___ assisted by ___, and minor assistance by ____
lateral pterygoid
medial pterygoid
masseter
lateral movements (grinding and chewing) of mandible involves ____ and ____ of same side and ___ of opposite side
temporalis
masseter
pterygoids
dislocation of TMJ results from the heads of the mandibles dislocating ____ meaning they pass anterior to ____
anteriorly
articular tubercles
largest branch of external carotid artery in the neck and is a major source of blood supply for the nasal cavity, lateral walls and roof of oral cavity, all teeth and the dura mater in the cranial cavity
maxillary artery
1st part of maxillary artery gives rise to the ____ and ____ arteries
middle meningeal
inferior alveolar
2nd part of maxillary artery gives origin to ____, ___, ___, and ____ which course with branches of mandibular nerve
deep temporal
masseteric
buccal
pterygoid branches
3rd part of maxillary artery enters the ____ and gives rise to ___ and ___ arteries
pterygopalatine fossa
posterior superior alveolar
infra-orbital
occupies most of the IT fossa
pterygoid venous plexus
pterygoid venous plexus is located partly between the ___ and ___ muscles
temporalis
pterygoid
the pterygoid venous plexus drains anterior to the ___ vein via the ____ vein but mainly drains posteriorly via the ___ and then ___ veins
facial
deep facial
maxillary
retromandibular
the mandibular nerve arises from the trigeminal ganglion in the ____
middle cranial fossa
the mandibular nerve provides ___ and ___ functions
sensory
motor
the mandibular nerve descends through the ___ into the IT fossa
foramen ovale
the branches of CN V3
deep temporal (motor)
masseteric (motor)
buccal (sensory)
auriculotemporal
inferior alveolar
lingual
meningeal
nerve to tensor tympani
also present in IT fossa and is located near the mandibular nerve but is connected functionally to CN IX
otic ganglion
pass superiorly to enter the temporal fossa deep to the temporalis muscle to supply it
deep temporal nerve (motor)
pass laterally over the margin of the mandibular notch to enter the deep surface of the masseter muscle
masseteric nerve (motor)
passes posteriorly to the beck of the mandible and supplies sensory fibers to auricle and temporal region and TMJ
auriculotemporal nerve
the auriculotemporal nerve may encircle the ____
middle meningeal artery
the auriculotemporal nerve conveys ____ fibers from otic ganglion to the parotid gland
postsynaptic parasympathetic secretomotor
enters the mandibular foramen and passes through the mandibular canal
inferior alveolar nerve
inferior alveolar nerve supplies ____
all mandibular teeth on its side
inferior alveolar gives small branch ____ that innervate mylohyoid and anterior belly of digastric
nerve to mylohyoid
terminal branch of mandibular nerve is the ___ and supplies the skin and mucous membrane of the lower lip and skin of the chin
mental nerve
lies anterior to the inferior alveolar nerve and passes anteriorly under cover of the oral mucosa, medial and inferior to the 3rd molar tooth that provides sensory to the anterior 2/3 of the tongue, the floor of the mouth and the lingual gingivae
lingual nerve
the ___ joins the lingula nerve in the IT fossa
chorda tympani n.
chorda tympani carries taste fibers from ____
anterior 2/3 of tongue
chorda tympani carries ____ for submandibular and sublingual salivary glands
preganglionic parasympathetic fibers
the dura on the floors of the anterior and middle cranial fossa and the roof of the posterior cranial fossa are innervated by ____ arising directly or indirectly from the trigeminal nerve
meningeal branches
all divisions of CN V supply ____
sensation to dura
anterior cranial fossa
all 3 divisions of CN V
middle cranial fossa
mostly V3
the meningeal branch of V3 ascends to leave the IT fossa with ___ and reenter the cranial cavity through the ____
middle meningeal artery
foramen spinosum
also supplies the mastoid cells that communicate with the middle ear
meningeal nerve
