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Anatomy > Infratemporal Region > Flashcards

Infratemporal Region Flashcards

1
Q 
For the infratemporal fossa, name the following boundaries:
roof
medial wall
anterior wall
posterior wall
lateral wall
A

roof: greater wing of sphenoid
medial wall: soft palate muscles
anterior wall: posterior surface of maxilla
posterior wall: parts of temporal bone (styloid process and tympanic region)
lateral wall: ramus of mandible

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2
Q

Foramina spinosum and oval are found along the ___ of the infratemporal fossa

A

roof

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3
Q

What are the contents of the infratemporal fossa?

A
  1. medial and lateral pterygoid muscles
  2. maxillary artery
  3. ptyergoid venous plexus
  4. mandibular nerve (V3)
  5. chorda tympani
  6. otic ganglion
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4
Q

What are the muscles of mastication in the infratemporal space?

A

temporalis, lateral pterygoid, medial pterygoid

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5
Q

The maxillary artery is one of two terminal branches of the ____ ____ artery

A

external carotid

note: largest branch with supply to infratemporal fossa

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6
Q

The maxillary artery arises ____ to the neck of the mandible, often with parotid substance and courses either superficial or deep to the _____ ____ muscle

A

posterior; lateral pterygoid

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7
Q

The maxillary artery leaves the infratemporal fossa by passing through the _____ fissure into the pterygoplalatine fossa

A

pterygomaxillary

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8
Q

Give the 3 parts of the maxillary artery and where their branches go

A

part 1: mandibular - all branches pass through foramina
part 2: pterygoid - all branches go to muscles
part 3: pterygopalatine - branches given off in ptergopalatine fossa

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9
Q

In regards to branches of the mandibular division of the maxillary artery, this artery arises medial to the mandibular neck and splits the roots of the auriculotemporal nerve. It enters the skull via foramen spinosum.

A

MMA

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10
Q

In regards to branches of the mandibular division of the maxillary artery, this artery enters the mandibular canal via mandibular foramen along with the inferior alveolar nerve. It supplies the mandible, lower teeth, gingvae, and mentum.

A

inferior alveolar artery

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11
Q

The inferior alveolar artery has a ___ branch that diverges prior to entering the mandibular fossa

A

mylohyoid

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12
Q

In regards to branches of the mandibular division of the maxillary artery, this artery pierces through cartilage of the external auditory meatus

A

deep auricular artery

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13
Q

In regards to branches of the mandibular division of the maxillary artery, this artery travels to the inner surface of the tympanic membrane via the petrotympanic fissure (with chords tympani n.)

A

anterior tympanic artery

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14
Q

In regards to branches of the mandibular division of the maxillary artery, this artery distributes to extracranial features then enters the skull via foramen ovale

A

accessory meningeal artery

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15
Q

In regards to the pterygoid division of the maxillary artery, this artery has an anterior and posterior branch - they course on the deep surface of the temporalis muscle, supplying it.

A

deep temporal artery

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16
Q

In regards to the pterygoid division of the maxillary artery, this artery courses laterally to supply the master muscle by passing over the mandibular notch

A

masseteric artery

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17
Q

In regards to the pterygoid division of the maxillary artery, this artery passes inferior and anterior onto the buccinator

A

buccal artery

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18
Q

In regards to the pterygoid division of the maxillary artery, this artery has 2-3 branches to the lateral and medial pterygoid muscles

A

pterygoid artery

19
Q

In regards to the pterygopalatine branch of the maxillary artery, this artery enters the infratemporal surface of the maxilla near the pterygomaxillary fissure to supply molar and premolar teeth, gingivae and maxillary sinus

A

posterior superior alveolar artery

20
Q

The veins that accompany the branches of the maxillary artery drain into the ____ plexus that is found intermingled with the pterygoid muscles

A

pterygoid

21
Q

The pterygoid venous plexus interconnects superiorly to the ____ sinus, anteriorly with the ____ vein, and posteriorly forms the ____ vein that drains into the retromandibular vein

A

cavernous; facial; maxillary

22
Q

The _____ nerve is the largest branch of the trigeminal nerve

A

mandibular (V3)

23
Q

The mandibular nerve (V3) contains sensory fibers from neuron cell bodies that are located in the ____ ganglion, and motor fibers from the trigeminal motor nucleus found in the _____

A

trigeminal; brainstem

24
Q

The mandibular nerve passes through the foramen ____ to reach the infratemporal fossa

A

ovale

25
Q

A parasympathetic ganglion, the ___ ganglion, is located on the medial surface of the mandibular nerve just below foramen ovale

A

otic

26
Q

Preganglionic parasympathetic fibers to the otic ganglion are coming from the ______ nerve, but postganglionic parasympathetic fibers will join a branch of the mandibular nerve (______) to reach the parotid gland

A

glossopharyngeal; auriculotemporal

27
Q

Name the mixed branches of the mandibular nerve (V3)

A 
chorda tympani (taste and secretomotor)
auricolotemporal (sensory and secretomotor)
28
Q

Name the sensory branches of the mandibular nerve (V3)

A

lingual, inferior alveolar, mental, buccal

29
Q

This nerve is a branch of the mandibular nerve and provides sensory to the anterior 2/3 of the tongue and floor of oral cavity

A

lingual nerve

30
Q

The lingual nerve enters the oral cavity just lateral to the ____ ____ muscle to then run along the internal surface of the mandible

A

medial pterygoid

31
Q

The lingual nerve is joined on its posterior side by fibers of the ____ ____ nerve

A

chorda tympani

32
Q

The chorda tympani is a branch of the ___ nerve

A

facial

33
Q

In regards to the chorda tympani nerve, its cell bodies for the taste fibers are located in the ____ ganglion of the facial nerve

A

geniculate

34
Q

Lingual nerve injury proximal to chorda tympani joining results in what? Distal to joining?

A

proximal: loss of general sensation
distal: loss of both general sensation and taste from anterior 2/3 of tongue

35
Q

This nerve is a branch from the mandibular nerve (V3) and enters the mandible via the mandibular foramen to travel to the mandibular canal inferior to teeth roots. It supplies the lower teeth and gingiva.

A

Inferior alveolar nerve

36
Q

Part of the inferior alveolar nerve exits through the mental foramen forming the ____ nerve that is sensory to the chin and lower lip

A

mental

37
Q

This nerve is initially part of the inferior alveolar nerve. It is a motor branch that does not enter the mandibular foramen, but courses to innervate the mylohyoid and the anterior belly of the digastric

A

mylohyoid nerve

38
Q

What two nerves pass between the lateral and medial pterygoid muscles?

A

lingual and inferior alveolar

39
Q

This nerve is a branch from the mandibular nerve (V3) and has two components that form a loop around MMA. It courses posteriorly, enters the parotid gland, and supplies sensory fibers to the parotid, ear, and temporal regions

A

auriculotemporal nerve

40
Q

The auriculotemporal nerve also receives postganglionic parasympathetic fibers from the ____ ganglion

A

otic

note: these fibers travel with the auriculotemporal nerve to the parotid gland which they proved with secretomotor fibers

41
Q

Glossopharyngeal nerve - tympanic nerve - tympanic plexus - ___ ____ nerve - otic ganglion - auriculotemporal nerve

A

lesser petrosal

42
Q

This predominantly sensory branch of the mandibular nerve innervates the skin on the cheek covering the buccinator muscle, and also the mucosal lining of the cheek

A

buccal nerve

note: different than buccal branches of facial nerve

43
Q 
Deep temporal nerves
masseteric nerve
lateral pterygoid nerve
medial pterygoid nerve
nerve to tensor tympani
nerve to tensor veli palatini (soft palate)

These are all motor branches coming from what nerve?

A

Mandibular nerve (V3) or division of Trigeminal nerve

Anatomy (44 decks)

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