Infratemporal Region Flashcards
What vascurlature passesthru the petrotympanic fissure?
Anterior tympanic artery and chorda tympani nerve
Contents if the infratemporal fossa
Medial/Lateral pterygoid muscles, maxillary artery, pterygoid venous plexus, mandibular nerve, chorda tympani, otic ganglion
By what means does the maxiallry artery leave the infratemporal fossa?
Passes thru the pterygomandibular fissure
Branches from part 1 of maxillary artery
Middle meningeal, inferior alveolar, deep auricular, anterior tympanic, accessory meningeal
What branch splits the roots of the auricularotemporal nerve?
middle meningeal
What foramen does the middle meningeal artery use to enter the skull?
foramen spinosum
What is the inferior alveolar artery’s path?
enters mandibular foramen with the nerve, branches into myohyoid just before the foramen, becomes the mental artery after the mental foramen
Where does the deep auricular artery go to?
the auditory tube
Anterior tympanic artery
supplies middle ear
Foramen for accessory meningeal
Foramen ovale
Branches from part 2 of maxillary artery
Anterior/posterior deep temporals, masseteric, buccal, pterygoid (lateral and medial)
What branch of maxillary artery enters the infrtemporal surface of maxilla near pterygomaxillary fissure?
posterior superior alveolar artery
Superior connection to the pterygoid venous plexus
Cavernous sinus
Anterior connection to the pterygoid venous plexus
Facial vein
Poerior connection to the pterygoid venous plexus
Maxillary vein
How do infections spread in the facial venous system
Can spread in any direction due to a lack of valves
Where are the sensory fibers of mandibular nerve the trigeminal nerve located?
trigeminal ganglion
What foramen does the mandibular nerve pass thru?
Foramen ovale
Where is the otic ganglion located?
medial surface of the mandibular nerve, just below the foramen ovale
Where do the preganglionic parasympathetic fibers of the otic ganglion come from?
glossopharyngeal nerve
What do the postganglionic parasympathetic fibers join?
auriculotemporal to reach the parotid
Lingual nerve pathway
Enters oral cavity just lateral to medial pterygoid, runs along internal surface of mandible, inferior to 3rd molar tooth
What does the lingual nerve innervate?
sensory to anterio 2/3 of tongue and floor of orval cavity
What does the chorda tympani nerve innervate?
taste fibers from anterior 2/3 of tongue
From what nerves does the chorda tympani arise from?
facial nerve
Where do preganglionic parasympathetic fibers of the submandibular ganglion run?
Via the chorda tympani to the submandibular ganglion
Where do postganglionic parasympathetic fibers from the submandibular gland run to?
submandibular/sublingual salivary glands
Lingual nerve injury proximal to chorda tympani results in what?
general sensation loss (just the lingual nerve is hurt)
Injury to lingual nerve distal to chorda tympani results in what?
both taste and sensation lost
Mylohyoid nerve
branches off of inferior alveolar nerve just before the foramen to innervate the mylohyoid and anterior belly of digastric
What nerves pass between lateral and medial pterygoid muscles?
Lingual and inferior alveolar
What nerve is split by the middle meningeal artery?
auriculotemporal nerve
What provides sensory fibers to the parotid, ear, and temporal regions?
auriculotemporal nerve
Secretomotor fibers of the parotid gland are from what?
otic ganglion via the auriculotemporal nerve
Path of secretomotor fibers of the parotid gland
glossopharyngeal nerve, tympanic nerve, tympanic plexus, lesser petrosal nerve, otic ganglion, auriculotemporal nerve
Main sensory nerve of the cheek skin and mucosal lining of the cheek
buccal nerve
What nerve (and pathway) supplies the temporalis?
deep temporal nerves (usually 2) supply the muscle from the deep surface
Path of masseteric nerve
passes thru mandibular notch to innervate the masseter
Where do the lateral/medial pterygoid nerves originate from?
mandibular division of trigeminal nerve
Motor fibers to muscles of middle ear
nerve to tensor tympani
motor fibers to soft palate muscles
tensor veli palatini
When does the chords tympani join the lingual nerve?
Inferior border of lateral pterygoid muscle
