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Neuro 2nd Half > infratemporal fossa and TMJ > Flashcards

infratemporal fossa and TMJ Flashcards

1
Q

what passes through foramen ovale?

A

mandibular div of trigeminal nerve v3 and lesser petrosal nerve

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2
Q

what passes through foramen spinosum?

A

middle meningeal artery and meningeal branch of v3

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3
Q

contents of infratemporal fossa

A

pterygoid venous plexus maxillary artery l and m pterygoid muscles mandibular div of v3 autonomics (chorda tympani)

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4
Q

what connects the facial vein to the cavernous sinus?

A

pterygoid venous plexus

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5
Q

where does pterygoid venous plexus drain?

A

maxillary vein

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6
Q

maxillary artery course? subdivisions? branches?

A

lateral to lateral pterygoid m and horizontal across infratemporal fossa mandibular, pterygoid, and palatine subdivisions mandibular –> middle meningeal, inferior alveolar pterygoid–> masseteric, deep temporal, buccal, pterygoid palatine–> posterior superior alveolar, infraorbital, sphenopalatine, descending palatine,

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7
Q

what artery passes betwen the two roots of the auriculotemporal nerve?

A

middle meningeal artery

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8
Q

what artery travels w the inferior alveolar nerve? course?

A

inferior alveolar artery enters mandibular canal and leaves through the mental foramen

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9
Q

artery supply for lower jaw?

A

inferior alveolar artery

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10
Q

what arteries pass between pericranium and temporalis m?

A

deep temporal arteries

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11
Q

4 terminal branches of maxillary a

A

posterior superior alveolar infraorbital sphenopalatine descemding palatine

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12
Q

posterior superior alveolar

A

supplies molars/premolars pierces maxilla tuberosity

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13
Q

infraorbital a

A

out through inferior orbital fissure through floor of orbit to upper incisors ansd canines and sinus mucous membranes –> enters face through infraorbital foramen to maxillary face region

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14
Q

what artery supplies the nasal cavity sinuses?

A

sphenopalatine foramen

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15
Q

descending palatine artery

A

bifurcates in the pterygopalatine canal into lesser and greater palatine arteries –> supply the hard and soft palates lesser –> soft greater ->hard

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16
Q

lateral vs medial pterygoid muscles

A

lateral - horizontal, V3, opens mouth (protracts mandible), active in chewing medial - vertical, only m innervated by main trunk of V3, elevates and protracts mandible

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17
Q

what muscle elevates mandible? what muscle elevates AND retracts? both innervated by?

A

masseter temporalis (both) v3 mandibular nerve

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18
Q
A
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19
Q
A
20
Q

mandibular division of v3

anterior vs posterior division

A

before main split, it gives off meningeal nerve and medial pterygoid nerve

***anterior div is smaller and mostly motor (deep temporal x2, buccal, lateral pterygoid, masseteric)

****posterior div is larger and mostly sensory (auriculotemporal, mylohyoid, mental, inferior alveolar, lingual)

21
Q

two branches off main trunk V3?

A

meningeal nerve and medial pterygoid nerve

22
Q

meningeal nerve is SENSORY. it enters cranial fossa via____________

supplies __________

A

foramen spinosum

dura of middle cranial fossa

23
Q

buccal nerve

A

the only sensory branch in anterior mandibular div of v3

passes between the two heads of the lateral pterygoid muscle

24
Q

what nerve passes between the two heads of the lateral pterygoid m?

A

buccal nerve

25
Q

buccal nerve is NOT ——–

A

motor to the buccinator

26
Q

all motor nerves of the anterior div of V3 enter infratemporal fossa between ______ and ________

the sensory branch _____ enters the infratemporal fossa between the __________

A

skull and upper head of lateral pterygoid m

buccal nerve; two heads of the lateral pterygoid m

27
Q

three branches of posterior div of v3

A

auriculotemporal n

lingual n

inferior alveolar n

28
Q

auriculotemporal nerve ascends anterior to ______ and posterior to_____

A

the ear; superficial temporal artery

29
Q

sensory to TMJ?

A

auriculotemporal n

30
Q

sensation from anterior 2/3 of tongue and mouth floor?

A

lingual nerve

31
Q

what joins the lingual nerve?

A

chorda tympani

32
Q

what descends posterior and lateral to lingual nerve?

A

inferior alveolar nerve

33
Q

sensation to lower jaw and gums/teeth?

A

inferior alveolar artery

34
Q

mental nerve branches off of ____ and passes through_____

supplies sensation to___

A

inferior alveolar n; mental foramen

chin/lower lip

35
Q

other than the mental nerve, what else branches off the inferior alveolar nerve and what does it innervate?

A

nerve to the mylohyoid

mylohyoid and anterior belly of digastric muscle

36
Q

what is the only motor branch of posterior v3 division

A

nerve to the mylohyoid

37
Q

parasympathetic innervation

  • of parotid gland?
  • of submandibular and sublingual glands/taste sensation for ant 2/3?
A
  • preganglionic cell bodies in inf. salivatory nucleus in upper medulla and course w CNIX –> postganglionic in the otic ganglion –> axons course with auriculotemporal nerve to the parotid gland

–

-preganglionic cell bodies in the superior salivatory nucles in pontine tegmentum –> course w CNVII and chorda tympani –> follows lingual nerve and preganglionic synapse in the submandibular ganglion –> postganglionic are secretomotor and innrvate the glands

and taste fibers have cell bodies in geniculate ganglion

38
Q

TMJ is between

A

temporomandibular joint

head of mandible and articular tubercle/mandibular fossa of the temporal bone

39
Q

tmj syndrome from

A

stress-related use of tmj like granding teeth –> causes facial pain

40
Q

tmj

A
41
Q

upper part of tmj is surrounded by _____

lower part is surrounded by _______

they limit?

A

loose fibers that attach articular disc to articular tubercle and mandibular fossa

-

tight fibers (same attachments)

-

limit forward and backward movement of the disc

42
Q

articular disc is made of ______

type of joint?

hinge movements occur in lower or upper compartment?

A

dense fibrous CT

synovial joint

lower

43
Q

what keeps head of mandible in the mandibular fossa?

A

three ligaments (1 lateral and 2 medial)

lateral = temporomandibular ligament (zygomatic process to the lateral neck of mandible) –> lateral stability

medial = sphenomandibular(medial to capsule) and stylomandibular (styloid process to andlge and posterior mandible_

44
Q

tmj movement

A

only the mandible moves

4 muscles of mastication move it –> masseter, lateral and medial pterygoid, and temporalis

depression of mandible –> lateral pterygoid

elevation of mandible –> masseter and medial pterygoid and temporalis

45
Q
A

Neuro 2nd Half (8 decks)

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