Temporal & TMJ Flashcards
What are the components of the parotid gland region? (4)
Parotid Gland
Facial nerve ( 6 branches)
External carotid artery
Retromandibular vein
Components of the temporal fossa
Temporal fat pad Temporal fascia Temporalis muscle Middle temporal artery Superficial temporal artery Deep temporal arteries
RElationship of Parotid to Ear
Just inferior/anterior to external acoustic meatus
Swelling of gland will push ear superolateral (causes Mumps-viral infection)
what is the retromandibular vein formed by?
superficial and temporal maxillary vein
Where does the two divisions of retromandibular vein drain into?
IJV and EJV
The external carotid artery’s relationship with retromandibular vein
it is parallel and deep within it
what 2 terminal branches does the external carotid artery split into?
superficial temporal artery and maxillary artery
what nerve innervates all mm of facial expression?
facial nerve
where does the facial nerve exit the cranium?
stylomastoid foramen
what does the facial nerve form within the parotid gland?
parotid plexus
what are the 6 branches of the facial nerve?
temporal branches zygomatic branches buccal marginal mandibular branch cervical branch posterior auricular nerve
what bones does the temporal fossa incorporate?
frontal parietal temporal sphenoid zygomatic
The trigeminal nerve V3 division is called what
mandibular
what 2 divisions does V3 have
anterior and posterior
What is the function of anterior division
small and mainly motor EXCEPT BUCCAL NERVE (SENSORY)
What is the function of the posterior branch of V3
larger, sensory EXCEPT MYLOHYOID NERVE (MOTOR)
the auriculotemporal nerve travels with what?
superficial temporal a and v
what does the auriculotemporal nerve innervate?
sensory to TMJ and lateral scalp
what does the auriculotemporal nerve carry?
p-symp fibers from CN IX into parotid gland
what are the components of CN v3?
auriculotemporal nerve
anterior and posterior deep temporal nn.
temporal branches of facial nerve
what are the muscles of the infratemporal fossa
temporalis, medial and lateral pterygoids mm
what are the a and v of infratemporal fossa?
maxillary and brs
pterygoid plexus of veins
what are the nerves of the infratemporal fossa?
mandibular division of CN V Posterior superior alverolar n (V2) chorda tympani n branch of CN VII otic ganglion lesser petrosal n
what is the action of the medial pterygoid muscle?
elevates, protrudes, and rotates mandibule
what is the action of the lateral pterygoid muscle?
opens, protudes, and rotates mandible
What are the V3 branches?
Auriculotemporal masseteric and deep temporal nn medial and lateral pterygoid n buccal n inferior alveolar and lingual n
what are motor components of V3?
Auriculotemporal
masseteric and deep temporal nn
medial and lateral pterygoid n
what are the sensory components of V3?
buccal n
inferior alveolar and lingual n
What are the nerves of mastication?
masseteric n
deep temporal n
medial and lateral pterygoid n
What does the masseteric n supply and run through?
supplies masseter m and goes through mandibular notch
what does the deep temporal n supply
temporalis m
what does the medal and lateral n supply?
supplies medial and lateral pterygoid muscles
what is a special sensory branch of CN VII
chorda tympani n
what does chorda tympani n join posteriorly?
lingual n
what does the chorda tympani supply?
p-symp innervation to lower 2 salivary glands
what does the chorda tympani n carry to the tongue?
taste fibers from anterior 2/3 of tongue
what is the TMJ formed by?
portions of temporal bone and mandible
what joint is the TMJ
modified hinge type synovial joint
what are the 2 actions of TMJ
hinge and gliding actions
where is the articular disc between?
temporal bone and mandible
what are the 3 specifics of the articular disc
- concavoconvex superior surface
- concave inferior surface
- increases in thickness toward periphery
whats the significance of the concavoconvex superior surface?
fit articular tubercle & mandibular fossa
whats the significance of the concave inferior surface
to fit around mandibular condyle
What is the significance of the increased thickness toward periphery?
attaches the articular capsule
what are the 2 accessory ligaments of TMJ
stylomandibular ligament
sphenomandibular ligament
what does the stylomandibular ligament separate?
parotid and submandibular glands
what is the sphenomandibular ligament separated by?
capsule by maxillary a and auriculotemporal n
what does the facial nerve innervate?
facial expression muscles
what are the 3 contents of the temporal fossa
temporal fat pad
temporalis m
masseter muscle
neurovasculature
what 3 arteries are in the temporal fossa?
middle temporal artery
superficial temporal artery
deep temporal arteries
what does the buccal nerve supply?
buccal mucosa and skin of cheek
what does the inferior alveolar nerve enter?
mandibular foramen
what does the lingual nerve innervate?
anterior 2/3 of the tongue
