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ANAT3004 LECTURES > WEEK 6 - TMJ > Flashcards

WEEK 6 - TMJ Flashcards

1
Q

What is the TMJ comprised of

A
  • articular surfaces
  • stabilising structures
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2
Q

list the articular surfaces of TMJ

A
  • head of the condyle of the mandible
  • mandibular/glenoid/articular fossa and articular tubercle of the temporal bone
  • articular disc
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3
Q

list the stabilising structures of the TMJ

A
  • joint capsule and lateral ligament
  • postglenoid tubercle
  • stylomanidbular ligament
  • sphenomandibular ligament
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4
Q

is TMJ atypical or typical synovial joint

A

atypical

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5
Q

what makes TMJ atypical

A

articulating surfaces are fibrocartilage NOT hyaline

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6
Q

what is the joint of the TMJ

A

GINGLYMOARTHRODIAL JOINT - hinge and sliding join t

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7
Q

list the movements of the TMJ

A

depression (opening the mouth)
- anterior rotation
- translation
- anterior rotation
- elevation (closing mouth)
- portrusion - forward movement
- retrusion

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8
Q

list the muscles of mastication

A
  • temporalis
  • masseter
  • lateral pterygoid
  • medial pterygoid
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9
Q

list the accessory muscles of mastication

A
  • digastric muscle
  • buccinator muscle
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10
Q

which muscles of mastication does not move the TMJ

A

BUCCINATOR
and anterior belly of digastric

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11
Q

where does the massetter muscle originate from

A

zygomatic arch and the zygomer

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12
Q

where does the lateral upper pterygoid muscle originate from

A

infratemporal surface of the sphenoid

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12
Q

where does the lower lateral pterygoid muscle originate from

A

lateral side of the lateral pterygoid

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13
Q

where does the superficial head of the medial pterygoid muscle originate from

A

palatine bone

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14
Q

where does the deep head of the medial pterygoid muscle originate from

A

lateral pterygoid plate

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15
Q

where does the temporalis muscle originate from

A

inferior temporal line of parietal bone

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16
Q

list the arterial supply to TMJ

A

SAD
- superficial pharyngeal
- ascending pharyngeal
- maxillary artery

17
Q

list the arterial supply to the muscles of mastication

A

maxillary artery and superficial temporal artery

18
Q

what does the pterygoid branches of maxillary artery supply

A

medial and lateral pterygoid muscles

19
Q

what does masseteric branches of maxillary artery supply

A

massetter muscle

20
Q

what does the buccal branches of maxillary artery supply

A

buccinator

21
Q

where does the pterygoid venous plexus drains blood from

A

structures within the infratemporal fossa as well as the pterygopalatine fossa, and cavernous sinus via emissary veins

22
Q

what is trigeminal nerve formed by

A

sensory root and motor root from the brainstem

23
Q

where does the trigeminal nerve travel

A

anterolaterally over the posteromedial petrous part of the temporal bone

24
Q

where does the trigeminal nerve terminate

A

trigeminal sensory ganglion

25
Q

what does the ganglion in trigeminal nerve give rise to

A

ophthalmic
maxillary
mandibular
divisions of trigeminal

26
Q

where does the motor root of the trigeminal nerve exit the skull via and which other division does it unite with

A

foramen ovale
mandibular division

27
Q

where does the motor root of trigeminal nerve carry fibres from

A

mandibular nerve

28
Q

what type of sensory fibres from the muscles of mastication does trigeminal nerve contain

A

propioceptive

29
Q

list the branches of the mandibular nerve

A
  • meningeal branch
  • medial pterygoid branch
  • nerve to tensor tympani
30
Q

where does the meningeal artery arise from

A

posterior surface of the mandibular trunk

31
Q

what does the meningeal artery travel with and where

A

middle meningeal arteryy through foramen spinosum

32
Q

what does meningeal artery provide

A

sensory fibres to middle cranial fossa

33
Q

what is the medial pterygoid branch closely associated with

A

otic ganglion

34
Q

where does the medial pterygoid branch pass through

A

otic ganglion

35
Q

what is the innervation of the pterygoid branch

A

motor innervation to medial pterygoid muscle

36
Q

innervation of tensor tympani

A

motor innervation to tensor tympani

37
Q

list the anterior divisions of the mandibular nerve

A
  • deep temporal nerve
  • masseter nerve
  • lateral pterygoid nerve
  • long sensory buccal nerve
38
Q

list the posterior divisions of the mandibular nerve

A
  • auriculotemporal nerve
  • inferior alveolar nerve
39
Q

list the branches of inferior alveolar nerve of mandibular nerve

A
  • mylohyoid nerve
  • incisive nerve
  • mental nerve
40
Q

list the posterior division of mandibular nerve

A

lingual nerve

ANAT3004 LECTURES (12 decks)

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