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36 Cards in this Set
- Front
- Back
Contents of the Infratemporal Fossa
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MM: temporalis, lateral and medial pterygoid
VV: pterygoid plexus of veins, maxillary artery and branches NN: mandibular nerve + branches, chorda tympani, otic ganglion |
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Boundaries of Infratemporal Fossa
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Anterior: posterior surface, maxilla
Posterior: styloid process Medial: lateral pterygoid plate Lateral: ramus and coronoid process of mandible Anterior: greater wing of sphenoid and infratemporal crest |
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Contents of Temporal Fossa
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MM: temporalis
NN: deep temporal nerves, auriculotemporal nerve VV: deep & superficial temporal vessels |
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Boundaries of Temporal Fossa
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Anterior: zygomatic process of frontal bone, zygomatic bone
Posterior: temporal line Superior: temporal line Lateral: zygomatic arch Inferior: infratemporal crest Floor: parts of frontal, parietal, temporal, greater wing of sphenoid |
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Mandibular division of Trigeminal Nerve (V3) exits the skull via the...
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FORAMEN OVALE
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Motor Innervation of V3 (Mandibular Nerve)
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tensor veli palatini, tensor tympani, mm of mastication (temporalis, lateral and medial pterygoid, masseter), anterior belly of digastric, mylohyoid
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Sensory innervation of V3 (mandibular)
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lower teeth, lower face below the lower lip and mouth
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Branches of V3 (mandibular nerve)
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Meningeal
Muscular (to mm of mast) Buccal Auriculotemporal Lingual Inferior Alveolar |
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Meningeal Branch of V3 enters the cranial through the...
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FORAMEN SPINOSUM (along with the middle meningeal artery from the maxillary artery)
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Muscular Branch of V3
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branches into deep temporal, medial and lateral pterygoid, masseter to supply mm of mastication
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Buccal Nerve - path & innervation
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descends btw two head of lateral pterygoid to penetrate buccal mm to supply mucous membranes of cheek and gums
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Auriculotemporal Nerve of V3 encircles what artery?
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Middle Meningeal a.
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What type of fibers does the auriculotemporal nerve carry?
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GSA: sensory from TM joint
GVE: postganglionic parasympathetic and sympathetic to parotid gland |
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Describe the pathway of Lingual n. (what nerve joins it? what ganglion does it supply with what kind of fibers?)
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descends deep to the latera pterygoid where it joins the chorda tympani (from CN VII), which conveys parasympathetic preganglionic to submandibular gland
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Inferior Alveolar - pathway
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passes deep to lateral pterygoid btw sphenomandibular ligament and ramus of mandible;
enters MANDIBULAR CANAL via MANDIBULAR FORAMEN to supply tissues of chin and lower teeth and gum |
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Otic Ganglion - location?
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in infratemporal fossa, just below the foramen ovale btw the mandibular nerve and tensor veli palatini
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Otic Ganglion
1) what fibers does it receive along what nerves? 2) where do the fibers go after synapsing here? |
1) Receives preganglionic parasympathetic fibers that run in the glossopharyngeal nerve, tympanic plexus and lesser petrosal nerve
2) After synapsing, the postganglionic fibers run in the auriculotemporal nerve to innervate the PAROTID GLAND |
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Maxillary Artery arises from...
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EXTERNAL CAROTID ARTERY
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Three Parts of the Maxillary Artery
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Mandibular part, Pterygoid part, Pterygopalatine Part
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Branches of the Mandibular part of the Maxillary artery
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deep auricular, anterior tympanic artery, middle meningeal artery, accessory meningeal artery, inferior alveolar artery
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branches of Pterygoid part of Maxillary artery
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branches supply the mm of mastication:
anterior & posterior deep temporal, pterygoid, masseteric, buccal |
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Pterygopalatine Part of Maxillary artery (pathway, branches)
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Runs btw two head of lateral pterygoid through pterygomaxillary fissure to pterygopalatine fossa;
Branches: - Posterior-superior alveolar - Infraorbital (--> ant & mid sup alveolar) - descending palatine - artery of pterygoid canal - pharyngeal artery - sphenopalatine artery |
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What artery may be damaged that could result in a nosebleed?
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Sphenopalatine (branch of maxillary artery)
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Pterygoid Plexus of Veins (location, tributaries)
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lies of the lateral surface of the medial pterygoid muscle,
receives veins corresponding to maxillary artery & drains into maxillary vein |
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What venous sinus & veins communicates with the Pterygoid Plexus? Through which vessels?
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Pterygoid venous plexus communicates with CAVERNOUS SINUS via emissary veins, the inferior opthalmic vein and the facial vein
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the Retromandibular vein is formed by...
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the superficial temporal and maxillary veins
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The Retromandibular vein drains into...
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anterior part --> joins facial to form common facial;
posterior part --> joins posterior auricular to form External Jugular vein |
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Parotid Gland is located in what space?
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Retromandibular space between ramus of the mandible in front and mastoid process and SCM behind
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Parotid Gland receives innervation from where?
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lesser petrosal of glossopharyngeal nerve carries parasympathetic preganglionic to otic ganglion; auriculotemporal carries postganglionic from otic ganglion to Parotid Gland...
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What duct is associated with the parotid gland? Where does it open?
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Stensen's duct - crosses masseter, pierces buccinator, opens into oral cavity opposite the second upper molar tooth
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Surgical removal of the parotid gland may damage which nerve?
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Facial
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Temporomandibular Joint - what type of joint is it?
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combined gliding and hinge type of SYNOVIAL JOINT
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What ligaments reinforce the TMJ?
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lateral (temporamandibular) ligament which extends from zygoma to neck of mandible;
SPHENOMANDIBULAR LIG. which extends from spine of sphenoid bone to lingula of the mandible |
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What nerve innervated the TMJ?
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auriculotemporal
(and masseteric branch) ....both from Mandibular nerve |
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Pterygomandibular raphe
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ligamentous band btw buccinator m and superior pharyngeal constrictor
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Stylomandibular ligament - where is it? what does it separate?
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extends from styloid process to posterior border of the ramus of the mandible,
SEPARATES PAROTID GLAND FROM SUBMANDIBULAR |