Parotid and temporal Flashcards
What is the shallow depression on the anterior surface of the condylar process?
Pterygoid fovea
Which portion of the temporal bone contains the temporal fossa?
Squamous
What portion of the temporal bone makes up the cheek bone?
zygomatic process of the temporal
What eminence borders the mandibular fossa?
Articular tubercle
What 2 landmarks does the tympanic portion of the temporal bone include?
External Auditory Meatus, styloid process
The spine of the sphenoid marks what 2 portions of the temporal bone?
Petrous and squamous
What is the strongest ligament of the TMJ?
lateral temporomandibular ligament
What portion of the sphenoid bone articulates with the temporal bone?
Greater wings
What are the hook-like projections on the ends of the pterygoid plates?
Pterygoid Hamulus
Which pterygoid plate does the medial pterygoid muscle attach to?
Lateral Pterygoid plate (medial surface)
Which head of the lateral pterygoid muscle attaches to the lateral portion of the lateral pterygoid plate?
Inferior head
Where does the superior head of the lateral pterygoid muscle insert?
pterygoid fovea, TMJ joint capsule, TMJ articular disk**
What branch/nerve feeds the pterygoid muscles?
Opthalmic branch of the trigeminal nerve
Where do the heads of the temporalis originate?
Deep: Inferior temporal line, Superficial: temporal fascia
What superficially covers the masticatory muscles?
Masserteric fascia
What fascia is the deep cervical fascia a part of?
Masserteric fascia
What forms the lateral and inferior border of the temporal fossa?
zygomatic arch
On what bone is the superior temporal line?
Parietal
Where does the temporalis insert?
the anterior (and sometimes lateral) portion of the coronoid process/ramus
What separates the temporalis heads?
Deep temporal fascia
What 3 muscles form the musclar line along the pteryomaxillary fissure?
inferior/superior head of lateral pterygoid, superficial head of medial pterygoid
How is the TMJ cartilage different from other joints?
it is covered by a relatively thick layer of fibrocartilage
What separates the opposing fibrocartilage surfaces of the TMJ
Articular disk
Anterior band
Portion of the articular disk bound to the anterior portion of the TMJ capsule
What part of the articular disk is thickest?
Posterior band
What does the articular disk divide in the TMJ?
Superior/inferior disk space
Where are depression/elevtion movements of the mandible accomplished in the TMJ?
inferior disk space
Where are anterior/posterior movements of the mandible accomplished?
Superior disk space
What is the connection between the posterior end of the articular disk and joint capsule?
Retrodiskal Tissue
What produces the TMJ click?
The articular disk sliding back and forth over the anterosuperior surface of the condyle
What divides the parotid gland?
Masseter
What fascia envelops the parotid gland?
Medial: masserteric fasic, Lateral: Parotid fascia
Exit foramen of the facial nerve?
Stylomastoid foramen
Where does the facial nerve bifurcate?
the parotid gland (temporofacial and cervicofacial divisions)
What is the path of the parotid duct?
anterior surface of the gland, over the lateral surface of the masseter, dives medial at the anterior margin of the masseter, pierces the buccinator to enter the oral cavity
What is the opening inside the mouth for the parotid duct?
Parotid papilla
Parotitis
Inflamation of the parotid gland. Blockage of the gland/duct. Increased size of papilla and gritty discharge into the mouth
Path of the posterior auricular artery
Off of ECA, deep t oparotid gland, posterior border of the external auditory meatus, crossing supramastoid crest
Where dose the ECA bifurcate?
Parotid gland
Path of the superior temporal artery
from parotid gland, runs superiorly along anterior border of EAM, gives rise to middle temporal artery at zygomatic process of temporal, branches over the surface of the temporalis
What are the borders of the mandibular segment of the maxillary artery?
Deep to neck of condylar process, superficial to sphenomandibularligament
Pterygoid segment of the maxillary artery borders
Deep to coronoid process/insertion of temporalis, lateral surface of lateral pterygoid muscle
Demarcation for pterygomaxillary segment of maxillary artery
The passage between the lateral pterygoid heads
Deep temporal arteries path
Off of pterygoid segment of Max artery, enter deep head of temporalis, astamose with middle temporal artery
Where is the maxiallry venous plexus?
Deep to coronoid process and temporalis, superficial to lateral pterygoid
What forms the anterior retromandibular vein?
Maxillary venous plexus, superficial temporal vein
Veins that form the EJV
Posterior retromandibular vein, posterior auricular vein
What veins run thru the parotid gland?
Anterior/posterior retroarticular veins
Veins that form the IJV
Anterior retromandibular vein+facial vein + lingual vein= Common truck, merges with IJV
Largest of trigeminal nerve branches
Mandibular
Foramen for mandibular division of trigeminal nerve
foramen ovale
Path of mandibular division
Exits via foramen ovale, deep to temporalis/coronoid process, superficial to pterygoids
Sensory paths of mandibular division
parotid, auriculotemporal, masseteric
Motor paths of mandibular division
4 muscles of mastication
4 muscles of mastication
temporalis, medial/lateral pterygoids, masseteric
3 neural components of parotid gland
Auriculotemporal (via otic ganglion), lesser petrosal nerve (via otic ganglion/glossopharyngeal nerve), superior cervical gangion/carotid plexus (sympathetic innervation)
