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cranial and cervical > TMJ > Flashcards

TMJ Flashcards

1
Q

where does the motor division of trigeminal pass through out of skull?

A

foramen ovale

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2
Q

where is the cell body of the sensory division of trigeminal ganglion located and what type of neuron is it?

A

unipolar and located in trigeminal ganglion

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3
Q

where is the trigeminal ganglion located?

A

between periosteal and meningeal layers of dura in Meckel’s cave

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4
Q

do all trigeminal fibres have their cell bodies in the t.ganglion?

A

no, proprioceptive axons of muscles of mastication do not have their cell bodies in the trigeminal ganglion.

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5
Q

what are the branches of mandibular nerve trunk and where do they pass through?

A

meningeal branch-foramen spinosum , medial pterygoid which branches into tensor tympani and tensor palati, also another branch that goes into medial pterygoid muscle.

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6
Q

what structures pass through foramen spinosum?

A

meningeal branch of mandibular nerve and middle meningeal artery to supply meninges of middle cranial fossa and mastoid hair cells

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7
Q

what are they branches of mandibular nerve anterior division?

A

nerves supplying muscles of mastication except medial pterygoid.
e.g. masseteric nerve, 2-3 deep temporal nerves, lateral pterygoid nerve =all motor, + buccal nerve (sensory)

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8
Q

what are the sensory branches of mandibular nerve ?

A

buccal branch and proprioceptive branches to muscles muscles of mastication, posterior division branches i.e. lingual, inferior alveolar (mixed), auriculotemporal (cutaneous sensory), mental and incisive nerves.

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9
Q

what does the buccal nerve supply?

A

cheek, buccal mucosa, buccal gingiva over mandibular molars.

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10
Q

what are the branches of mandibular nerve posterior division and their modality?

A

lingual(sensory), auriculotemporal(cutaneous sensory) and inferior alveolar nerve(mixed motor and sensory) which gives off mylohyoid branch before entering mandibular foramen. Then gives off terminal branches of mental and incisive nerves before 1st and 2nd premolars.

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11
Q

mental nerve is a —– branch (modality) of —— nerve

A

cutaneous, inferior alveolar nerve

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12
Q

list auricular surfaces of TMJ?

A

head of condyle of mandible, mandibular/glenoid fossa of temporal bone, anterior articular tubercle of temporal bone, complete articular disc attached to joint capsule

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13
Q

what are the stabilising structures of TMJ”?

A

joint capsule, posterior glenoid tubercle, stylomandibular ligament, sphenomandibular ligament and lateral ligament

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14
Q

complete the following regarding TMJ structures:

  • Disk is made out of …and it’s thick…..
  • capsule is …. except …… which is …. &…..
  • stylomandibular ligament is derived from….
  • condyle & squamous temporal both develop as ….. bones except for …. which develop by ……. from the specialised cartilage covering these surfaces.
A
  • fibrocartilage, medially and posteriorly
  • collagen, posterosuperior which is collagen and elastic
  • posterior parotid capsule
  • membrane bones, head of condyle and articular fossa, endochondral ossification.
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15
Q

petrotympanic fissure is …… to mandibular fossa.

A

posterior

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16
Q

sphenomandibular ligament attaches to?

A

spine of sphenoid to lingula

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17
Q

both superior and inferior surfaces of tmj capsule are lined with….., which is a specialised…… covering.

A

synovial membrane, fibrocellular

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18
Q

what type of joint is TMJ?and why?

A

atypical synovial, not covered with hyaline cartilage instead covered with fibrocartilage.

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19
Q

most of the mandible develops as a …. bone, bone that differentiates in…. and not via intermediate cartilage model. Hence, there is no …..in condyle.
In addition, a cap of …. forms over the head of condyle which is responsible for …. & ….. of the TMJ. This cartilage is also present in …. which as we get older becomes ….

A

membrane bone, connective tissue, growth plate.

Cartilage, growth and remodelling, articular fossa of temporal bone, fibrous.

20
Q

in terms of TMJ movements, TMJ is a — which means —- joint.

A

ginglymoarthrosis, sliding hinge joint.

21
Q

what are the movements involved in opening of mouth?

A

rotation, sliding forward and second rotation of head of condyle.

22
Q

what is the arterial supply to TMJ?

A

branches of ex.carotid: superficial temporal, ascending pharyngeal, deep auricular (branch of maxillary artery).
(SAD).

23
Q

Venous drainage of tmj?

A

pterygoid venous plexus

24
Q

innervation of tmj?

A

proprioception and pain from branches of anterior and posterior divisions of mandibular nerve: masseteric, auriculotemporal, deep temporal (MAD).

25
Q

innervation, blood supply and drainage of muscles of mastication?

A

motor: branches of anterior division of mandibular nerve, except medial pterygoid which is from the trunk.
- arterial supply is one of the two main terminal branches of ex. carotid; superficial temporal OR branches of maxillary artery.
- venous drainage: pterygoid venous plexus.

26
Q

what are the attachments of masseter on both parts?

A

medial side of maxillary process of zygomer and anterior zygomatic arch to angle and ramus of mandible. Deep part also connects zygomatic arch to coronoid process.

27
Q

what is the arterial supply of masseter?

A

masseteric, facial and transverse facial arteries.

28
Q

what are the attachments of temporalis fascia and muscle?

A

fascia: superior temporal line & zygomatic arch.
muscle: arises from temporal fossa and temporalis fascia , forms a thick tendon which goes deep to zygomatic arch and inserts medial to coronoid process and upper ramus.

29
Q

blood supply of temporalis?

A

deep temporal branches of maxillary artery with contributions from superficial temporal artery.

30
Q

attachments of lateral pterygoid muscle?

A

upper head: infratemporal surface of sphenoid /lateral to lateral pterygoid plate.
lower head: lateral surface of lateral pterygoid plate. Both insert into neck of condyle of mandible and capsule of TMJ.

31
Q

what is the arterial supply of lateral pterygoid muscle?

A

lateral pterygoid branch of maxillary artery

32
Q

what are the attachments of medial pterygoid?

A

deep head arises from medial side of lateral pterygoid plate.
superficial head arises from pyramidal process of palatine bone . both heads go to medial surface of ramus.

33
Q

relationship of lateral pterygoid with other structures:

  • maxillary artery passes— or —- to —- of lateral ptery then —– into ——.
  • buccal nerve passes —-
  • lateral to it you have—-
  • medial to it are —-, —–,—-.
  • between lower border of lower head —–, —- and —- pass.
A
  • superficial or deep to lower head, then between thr two heads to go into pterygopalatine fossa.
  • between two heads.
  • tendon of temporalis.
  • middle meningeal artery, sphenomandibular ligament and chorda tympani.
  • inferior alveolar artery and nerve, and lingual artery.
34
Q

regarding relationship of medial pterygoid with others:
—– and — are lateral.
3 muscles that are medial to medial pterygoid?

A

inferior alveolar artery and nerve lateral.

1. tensor palati 2. styloglossus 3. stylopharyngeus are medial.

35
Q

what are the attachments of buccinator?

A

outer surface of posterior mandible & maxilla & pterygomandibular raphe. Inserts into modiolus with some fibres crossing into
orbicularis oris.

36
Q

innervation of buccinator?

A

dual from buccal branch of facial nerve (motor), probably long sensory buccal branch of mandibular nerve.

37
Q

buccal fat pad separates …. &… from ….&….

A

posterior buccinator and pterygomandibular raphe from ramus of mandible and masseter.

38
Q

what are the attachments of pterygomandibular raphe?

A

buccinator (anteriorly) and superior constrictor pharynx attache
(posteriorly) to it. The raphe attaches to hamulus of pterygoid.

39
Q

muscles involved in jaw elevation and depression?

A

ELEVATION: medial pterygoid and masseter + temporalis vertical fibres.
DEPRESSION: lateral pterygoid and supra and infrahyoid +gravity.

40
Q

t/f: medial pterygoid muscle inserts into medial pterygoid plate.

A

false. inserts into medial surface of lateral pterygoid.

41
Q

the motor trigeminal nerve joins the ….nerve just before it passes through foramen ovale.

A

mandibular nerve

42
Q

what does mylohyoid nerve innervate?

A

motor fibres to mylohyoid muscle and anterior belly of digastric.

43
Q

what does lingual nerve innervate?

A

sensory to anterior 2/3 of the tongue.

44
Q

what does chorda tympani innervate?

A

special sensation;taste to anterior 2/3

+ parasym fibres to submandibular and sublingual glands.

45
Q

what does auriculotemporal nerve innervate?

A

sensation to skin of the auricle + some of temporal region

46
Q

…… is a hitchhiker on the auriculotemporal nerve.

A

parasymp fibres of glossopharyngeal nerve which innervate parotid gland.

cranial and cervical (6 decks)

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