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93 Cards in this Set
- Front
- Back
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What is the posterior/superior boundary of the temporal fossa?
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temporal lines
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What is the anterior boundary of the temporal fossa?
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frontal/zygomatic bones
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What is the lateral boundary of the temporal fossa?
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zygomatic arch
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What is the inferior boundary of the temporal fossa?
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infratemporal fossa
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What is the floor boundary of the temporal fossa?
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pterion + associated bones
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What artery is a concern for a blow to the temporal fossa?
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middle meningeal artery
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What forms the roof of the temporal fossa?
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the temporal fascia
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What arteries and veins are in the temporal fascia?
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superficial temporal arteries and veins
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The temporal fascia is an attachment for what?
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temporalis muscle
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What does the temporal fascia resist?
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masseter action
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What is the temporalis muscle known for?
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muscle of mastication
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What is the action of temporalis muscle?
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elevate, retract mandible
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What is the innervation of temporalis muscle?
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motor branches (SE) of mandibular nerve (CN V3)
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What is the temporalis muscle known for?
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muscle of mastication
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What is the action of temporalis muscle?
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elevate, retract mandible
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What is the innervation of temporalis muscle?
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motor branches (SE) of mandibular nerve (CN V3)
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What is the temporalis muscle known for?
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muscle of mastication
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What is the action of temporalis muscle?
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elevate, retract mandible
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What is the innervation of temporalis muscle?
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motor branches (SE) of mandibular nerve (CN V3)
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What is the superior border of the infratemporal fossa?
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zygomatic arch (communicates with temporal fossa)
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What is the inferior border of the infratemporal fossa?
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medial pterygoid on mandible
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What is the lateral border of the infratemporal fossa?
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medial surface of ramus of mandible
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What is the medial border of the infratemporal fossa?
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lateral pterygoid plate
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What is the anterior border of the infratemporal fossa?
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maxilla
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What is the posterior border of the infratemporal fossa?
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tympanic plate
mastoid/styloid processes |
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What are the muscles of mastication?
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temporalis (inferior portion)
masseter medial pterygoid lateral pterygoid |
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What is the motor innervation (SE) for the muscles of mastication?
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CN V3
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What is the action of masseter muscle?
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elevate, protrude mandible
(deep fibers retrude) |
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What are the actions of lateral pterygoid muscle?
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protrude mandible
depress chin side-to-side |
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What are the actions of medial pterygoid?
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elevate, protrude mandible
side-to-side |
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The maxillary artery passes through which fossa?
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infratemporal fossa
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What is the relationship of the maxillary muscle to the lateral pterygoid muscle?
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the maxillary artery is superficial to it
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What are the 3 parts to the maxillary artery?
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1st: mandibular part
2nd: pterygoid part 3rd: pterygopalatine part |
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What arteries does the mandibular part of the maxillary artery give off?
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middle meningeal artery
inferior alveolar artery |
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What opening in the skull does the middle meningeal artery pass through after it branches off the maxillary artery?
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foramen spinosum
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What foramen does the inferior alveolar artery pass through after it branches off the maxillary artery?
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mandibular foramen
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What branches does the pterygoid part of the maxillary artery give off?
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muscular branches
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What area does the pterygopalatine part of the maxillary artery supply?
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maxilla, nasal cavity, etc.
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What area does the pterygoid venous plexus drain?
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drains area supplied by maxillary artery
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What does the pterygoid venous plexus drain into?
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maxillary vein
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What vein does the maxillary vein join with and what do they form?
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the maxillary vein joins with the superficial temporal vein to form the retromandibular vein
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How does the pterygoid venous plexus communicate with the facial vein?
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via the cavernous sinus
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Where does CN V3 (mandibular nerve) enter the infratemporal fossa?
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foramen ovale
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What innervation does the mandibular nerve provide to the infratemporal fossa?
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SA (pain, touch, temp)
SE (muscles of mastication) |
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The auriculotemporal nerve is a branch of what nerve?
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mandibular nerve (CN V3)
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What is the relationship of auriculotemporal nerve to middle meningeal artery?
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the auriculotemporal nerve encircles the middle meningeal artery
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The auriculotemporal nerve receives SA from what areas?
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auricle
tympanic membrane external acoustic meatus skin TMJ parotid gland |
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The parotid gland receives postganglionic parasympathetic nerve fibers from what nerve?
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auriculotemporal nerve
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The inferior alveolar nerve is a major branch of what nerve?
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mandibular nerve (CN V3)
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The inferior alveolar nerve enters what foramen and with what artery?
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enters the mandibular foramen with the inferior alveolar artery
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The inferior alveolar nerve receives SA from what area?
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teeth/associated tissues
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What foramen does the inferior alveolar nerve exit and what does it turn into after it exits the foramen?
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exits the mental foramen as the mental nerve
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The mental nerve receives SA from what area?
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skin over the mandible
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The mylohyoid nerve is responsible for what type of innervation?
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SE to mylohyoid and anterior digastric muscles
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The lingual nerve is a major branch of what nerve?
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mandibular nerve (CN V3)
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The lingual nerve carries sensory (SA) from what areas?
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anterior 2/3 of tongue
floor of mouth lingual gingivae |
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What nerve joins lingual nerve?
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chorda tympani (from CN VII)
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Is the buccal nerve a motor nerve?
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NO!
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The buccal nerve carries sensory (SA) from what area?
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skin and mucosa of cheek
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The buccal nerve is a major branch of what nerve?
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mandibular nerve (CN V3)
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Where would you perform a mandibular nerve block?
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extraoral injuection at mandibular notch anesthesizes entire distribution of CN V3.
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What structures do you need to be careful of when performing a mandibular nerve block?
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parotid gland
facial nerve (CN VII) |
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Where would you perform an inferior alveolar nerve block?
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intraoral injection near mandibular foramen (palpate for lingula)
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Where is the otic ganglion located?
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in the infratemporal fossa
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What type of cell body is the otic ganglion?
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postganglionic parasympathetic cell body
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What type of nerve fibers does the otic ganglion send to the parotid gland via auriculotemporal nerve?
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postganglionic parasympathetic fibers
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What is the relationship of the otic ganglion to foramen ovale and CN V3?
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inferior to foramen ovale
medial to CN V3 |
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Where does the otic ganglion receive VE from?
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preganglionic parasympathic (VE) from CN IX (lesser petrosal nerve)
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The chorda tympani is a branch off what nerve and joins with what other nerve?
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branch off of facial nerve (CN VII)
joins lingual nerve (branch of mandibular nerve, CN V3) |
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The chorda tympani nerve is responsible for taste (VA) from what area of the tongue?
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anterior 2/3
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The chorda tympani nerve provides VE to what area?
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VE (preganglionic parasympathetics) to the submandibular ganglion
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What type of joint is the Temporomandibular Joint (TMJ)?
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synovial, modified hinge joint
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Is the joint capsule of the TMJ a tight or loose articular capsule?
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loose articular capsule
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What movement does the lateral TMJ ligament restrict?
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posterior movement of mandible protecting external auditory meatus
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What separates the joint capsule of the TMJ into superior and inferior cavities?
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fibrocartilaginous articular disc
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What movements is the superior cavity of the TMJ responsible for?
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protrusion-retrusion (translation)
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What type of membrane do the superior and inferior cavities of TMJ have?
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synovial membrane
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What type of movement is the inferior cavity of the TMJ responsible for?
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depression and elevation (hinge motions)
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What motions do the lateral pterygoid and articular disc of TMJ permit?
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lateral pterygoid pulls articular disc forward
allows "translation" of mandible permits jaw to open |
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What movements occur at the TMJ?
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depression of mandible
elevation of mandible protrusion of mandible retrusion of mandible lateral movement of mandible |
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What are the primary movers of the TMJ?
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muscles of mastication
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What is responsible for depression of mandible at TMJ?
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gravity
suprahyoid, infrahyoid muscles lateral pterygoid (translation) |
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What is responsible for elevation of the mandible at TMJ?
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temporalis m.
masseter m. medial pterygoid m. CN V3 |
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What is responsible for protrusion of the mandible at TMJ?
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lateral pterygoid m.
masseter m. medial pterygoid m. CN V3 |
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What is responsible for retrusion of mandible at TMJ?
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temporalis m.
masseter m. (deep fibers) CN V3 |
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What is responsible for lateral (side-to-side, grinding) of mandible at TMJ?
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retractors (retruders) of same side
protruders of opposite side CN V3 |
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What is associated with excessive lateral pterygoid m. contraction?
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opening of mouth too wide (yawning, large bites) which can lead to anterior displacement of TMJ
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What is lateral displacement of the TMJ associated with?
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blows to the side of head/jaw
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Why are posterior dislocations of TMJ considered rare?
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due to lateral temporomandibular ligament
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What is a posterior dislocation of TMJ typically associated with?
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broken mandible
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What structures should you be worried about damaging during a posterior dislocation of TMJ or regional surgery?
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CN VII and auriculotemporal nerve
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What can contribute to TMJ laxity?
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auriculotemporal nerve damage with ligament damage
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What symptoms would be present if CN V3 was lesioned?
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weakened/paralyzed muscles of mastication
anesthetized cutaneous sensation of mandible atrophy of masseter and temporalis mm. deviation to weak side (ipsilateral) when opening jaw (lateral pterygoid) |
