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Regional Anatomy > Infratemporal fossa > Flashcards

Infratemporal fossa Flashcards

1
Q

what is the infratemporal fossa

A

space beneath the base of the skull - between the skull and the ramus of the mandible

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2
Q

what foramen opens into the infratemporal fossa

A

foramen ovale

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3
Q

the foramen ovale opens into the infratemporal fossa which allows what

A

mandibular branch of the trigeminal nerve to exit skull

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4
Q

what artery passes from the infratemporal fossa into the foramen spinosum to gain entry to the skull

A

middle meningeal

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5
Q

what is the anterior boundary of the infratemporal fossa

A

posterior surface of maxilla

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6
Q

what is the posterior boundary of the infratemporal fossa

A

styloid process

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7
Q

what is the superior boundary of the infratemporal fossa

A

infratemporal surface of the greater wing of the sphenoid

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8
Q

what is the medial border of the infratemporal fossa

A

lateral pterygoid plate

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9
Q

what is the lateral border of the infratemporal fossa

A

ramus of the mandible

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10
Q

terminal branches of the maxillary artery pass through ___ to exit the infratemporal fossa

A

the pterygomaxillary fissure

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11
Q

what are the contents of the infratemporal fossa

A

lateral and medial pterygoid
mandibular division of the trigeminal nerve CNV3
maxillary artery and branches
pterygoid venous plexus
chorda tympani
otic ganglion

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12
Q

what nervous structures pass are found in the infratemporal fossa

A

otic ganglion
chorda tympani
mandibular division of the trigeminal nerve

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13
Q

what is the function of the medial pterygoid

A

assists in elevating the mandible

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14
Q

what is the function of the lateral pterygoid

A

pulls the neck of the mandible forward

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15
Q

together what do the pterygoids do

A

chewing movements

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16
Q

nerve supply of the pterygoids

A

mandibular division of trigeminal

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17
Q

what are the branches of the anterior division of the mandibular division of the trigeminal nerve

A

2x deep temporal
masseteric
nerve to lateral pterygoid
buccal (sensory)

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18
Q

what are the branches of the posterior division of the mandibular division of the trigeminal nerve

A

lingual (joined by chorda tympani)
inferior alveolar
mylohyoid
auricolutemporal

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19
Q

what branches does the the mandibular division of the trigeminal nerve give off before it divides into anterior and posterior branches

A

meningeal
nerve to medial pterygoid
communicating branch (tensor tympani and tensor veli palatini)

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20
Q

describe the course of the inferior alveolar branch of the posterior division of the mandibular division of the trigeminal nerve

A

supplies the lower teeth and then passes out onto face to supply cutaneous innervation to skin over mandible

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21
Q

what supplies cutaneous innervation to skin anterior to auricle

A

auriculotemporal branch

22
Q

what are the largest branches formed from the mandibular division of the trigeminal nerve

A

inferior alveolar and lingual nerves

23
Q

the maxillary artery is a terminal branch of what

A

ECA

24
Q

the maxillary artery passes through what where it branches to form arteries that supply what

A

infratemporal fossa
muscles of mastication, dura, lower teeth, cheek

25
Q

the maxillary artery passes between the heads of ____ to go into ______ to send branches to what

A

lateral pterygoid
pterygomaxillary fissure
branches to upper teeth

26
Q

what forms the lingual artery

A

second branch of the anterior division of the external carotid artery

27
Q

what are the 3 parts of the maxillary artery

A

mandibular
pterygoid
pterygopalatine

28
Q

what are the branches of the maxillary artery

A

inferior alveolar
mylohyoid
deep auricular and anterior tympanic
middle meningeal
deep temporal
posterior superior alveolar
infraorbital
buccal

29
Q

what branches of the maxillary artery go to the muscles

A

deep temporal
masseteric
pterygoid branches

30
Q

what should be removed in dissection to more easily see the maxillary artery crossing the infratemporal fossa from lateral to medial

A

lateral pterygoid

31
Q

what are the branches of the pterygopalatine part of the maxillary artery

A

posterior superior alveolar
infraorbital
anterior superior alveolar
palatine, pharyngeal and sphenopalatine branches

32
Q

the posterior superior alveolar artery supplies

A

upper molar and premolar

33
Q

the infraorbital artery supplies

A

canal in floor of orbit, foramen

34
Q

the anterior superior alveolar branches supply

A

upper incisor and canine

35
Q

what is the small connected network of veins surrounding lateral pterygoid

A

pterygoid venous plexus

36
Q

what does the pterygoid venous plexus communicate with

A

cavernous sinus inside the skull and the facial vein that drains the superficial structures of the face - pathway for pathogens to meninges

37
Q

what drains the pterygoid venous plexus

A

maxillary vein

38
Q

the pterygoid venous plexus receives veins from

A

orbit, nasal and oral cavities

39
Q

the parasympathetic secretomotor nerves that supply the submandibular and sublingual salivary glands are from

A

facial nerve

40
Q

the main part of the facial nerve passes through the ___ foramen and ___ gland to what

A

stylomastoid
parotid
muscles of facial expression

41
Q

what branch does the facial nerve form as it passes through the temporal bone

A

chorda tympani

42
Q

why is the lingual branch of the mandibular division of the trigeminal nerve an ideal candidate to carry parasympathetic nerve fibres to structures in the mouth

A

the main part of the facial nerve passes to the muscles of facial expression and does not enter the oral cavity whereas the lingual branch of the mandibular division of the trigeminal nerve does

43
Q

the chorda tympani branch crosses what in the middle ear

A

handle of the malleus (ossicle in middle ear)

44
Q

how does chorda tympani reach the infratemporal fossa

A

passes through a bony canal

45
Q

what does chorda tympani do in the infratemporal fossa

A

joins the lingual nerve

46
Q

what fibres run in the chorda tympani with the lingual nerve

A

parasympathetic secretomotor to submandibular and sublingual salivary glands and special taste to anterior 2/3 tongue

47
Q

taste of anterior 2/3 tongue

A

facial nerve - chorda tympani

48
Q

general sensory anterior 2/3 tongue

A

the mandibular division of the trigeminal nerve

49
Q

the otic ganglion lies at the mouth of what

A

foramen ovale

50
Q

what passes through otic ganglion without synapsing

A

post-ganglionic sympathetic fibres and motor nerves to tensor tympani and tensor veli palatini (CNV3)

Regional Anatomy (36 decks)

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