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Anatomy Final > infratemporal fossa > Flashcards

infratemporal fossa Flashcards

1
Q

identify

A

infratemporal fossa

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2
Q

identify

A

zygomatic arch

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3
Q

identify

A

temporalis m.

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4
Q

identify

A

coronoid process of mandible

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5
Q

origin and insertion of temporalis m.

A

o: floor of temporal fossa; deep surface of temporal fascia

I: coronoid process

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6
Q

innervation and action of temporalis

A

N: mandibular nerve (CN V3)

A: elevate and retract mandible

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7
Q

Name this ligament

A

temporomandibular ligament: runs from temporal bone to neck of mandible

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8
Q

what is the action of the temporomandibular ligament

A

restricts posterior and lateral movement

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9
Q

Name and give action for the purple ligament

A

sphenomandibular ligament

Action: provides passive support

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10
Q

The temporomandibular joint (TMJ) is composed of an articular disc surrounded by cavities. Give the actions of the superior cavity and inferior cavity of the TMJ

A
  • superior cavity: protrusion/retrusion (gliding/translation)
  • inferior cavity: hinge movement (depression/elevation)
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11
Q

What is the pin pointing to

A

Lingula of mandible

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12
Q

Identify

A

pterygomaxillary fissure

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13
Q

identify

A

mandibular fossa

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14
Q

identify red arrow

A

articular tubercle

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15
Q

red arrow

A

temporal surface of sphenoid bone

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16
Q

blue arrow

A

infratemporal surface of sphenoid bone

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17
Q

black arrow

A

lateral pterygoid plate

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18
Q

identify both

A

red: medial pterygoid plate of sphenoid
pin: lateral pterygoid plate of sphenoid

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19
Q

identify

A

forman spinosum

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20
Q

muscles of the infratemporal fossa are muscles of mastication. What nerve innervates these muscles?

A

motor supply from mandibular n. (CN V3)

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21
Q

identify

A

masseter m.

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22
Q

origin and insertion of masseter m

A

o: inferior border of zygomatic arch
i: lateral surface of ramus and angle of the mandible

23
Q

Innervation and action of masseter m

A

N: mandibular n. (CN V3)

A: elevate and protrude mandible

24
Q

identify

A

superior and inferior heads of lateral pterygoid muscle

25
Q

Origin of lateral pterygoin

A

superior: infratemporal surface of the greater wing of sphenoid
inferior: lateral surface of lateral pterygoid plate

26
Q

insertion of lateral pterygoid m.

A

superior: articular disc and capsule of TMJ
inferior: pterygoid fovea and capsule of TMJ

27
Q

action of lateral pterygoid m.

A

protrude mandible and depress chin

28
Q

side to side movements of the anterior mandible can be produced by unilateral use of muscles. Defind ipsilateral and contralateral excursion

A

ipsilateral excursion: retraction done on same side of muscle

contralateral excursion: protrusion done on opposite side of muscle

29
Q

identify

A

Superficial and deep head of medial pterygoid muscle

30
Q

origin of medial pterygoid muscle

A

superior head: maxillary tuberosity

Deep head: medial surface of lateral pteryoid

31
Q

Insertion of medial pterygoid m.

A

same for both superior and deep heads: medial surface of ramus of mandible

32
Q

innervation and action of medial pterygoid m.

A

N: Mandibular n. (CN V3)

A: elevate and protrude mandible

33
Q

Depression of the mandible is done by which 3 muscles

A
  • gravity
  • suprahyoid muscle
  • infrahyoid muscle
  • lateral pterygoid
34
Q

Elevation of the mandible is done via which 3 muscles

A
  • temporalis
  • masseter
  • medial pterygoid
35
Q

Protrusion of mandible is done by which 3 muscles

A
  • lateral pterygoid
  • superficial masseter
  • medial pterygoid
36
Q

retraction of mandible is done by which muscles

A
  • temporalis posterior fibers (prime)
  • anterior belly of digastric
37
Q

What artery is a branch off of the external carotid artery and can lie superfial or deep to the lateral pterygoid muscle?

A

maxillary artery

38
Q

The maxillary artery can be split into 3 sections based on the position to what muscle?

A

Lateral pterygoid m.

39
Q

The 1st (mandibular) part of the maxillary artery lies lateral/posterior to lateral pterygoid. Give the two main branches off of this section

A
  • middle meningeal: passes through foramen spinosum
  • inferior alveolar artery: passes through mandibbular foramen
40
Q

The auricotemporal nerve is split by what artery?

A

middle meningeal artery

41
Q

Name the branches off of the 2nd (pterygoid) part of the maxillary artery that lies superficial/deep to lateral pterygoid m.

A

muscular branches

  • temporalis
  • pterygoids
  • masseter
  • buccinator
42
Q

The maxillary vein connects to what venous plexus that lies in the infratemporal fossa

A

pterygoid plexus of veins

43
Q

What nerve enters the infratemporal fosaa through the foramen ovale and carries both motor and sensory brances

A

mandibular nerve (CN V3)

44
Q

The auriculotemporal nerve is a branch off of what nerve?

A

mandibular nerve (CN V3)

45
Q

The auricotemporal nerve supplies what type of innervation

A
  • sensory to TMJ
  • parasympathetic postganglionics to parotid gland
46
Q

What is the otic ganglion?

A

paraympathetic ganglion located immediately below the foramen ovale where synapse occurs in the innervation to parotid gland

* glossopharyngeal n. (CN IX) -> tempanic n. -> tympanic plexus -> lesser petrosal n. -> otic ganglion -> auriculotemporal n. -> parotid gland

47
Q

The inferior alveolar nerve is a branch off of what main nerve? What are its distinguishing features

A
  • mandibular n. (CN V3)
  • enters mandibular forman and passes through mandibular canal
  • sensory
48
Q

Mental nerve is a branch off of what nrve. What is its distinguishing feature? What type of innervation does it supply?

A
  • inferior alveolar n.
  • exits mental foramen
  • sensory
49
Q

The nerve to mylohyoid is a branch off of what nerve?

What type of innervation does it supply

A
  • inferior alveolar n.
  • motor innervation to mylohyoid and anterior belly of digastric
50
Q

The ligual nerve is a branch off of what nerve? What type of innervation does it suppy

A
  • branch of mandibular n. (CN V3): anterior to inferior alveolar n.
  • sensory
  • joined by chorda tempani n. (From CN VII)
51
Q

Chorda tympani. Where does it come from? What nerve does it join?

A
  • branch of facial nerve (CN VII)
  • joins lingual nerve to provide taste sensory to tongue
52
Q

What type of innervation does chora tympani provide and to what structure

A
  • preganglionic parasympathetics destined for submandibular ganglion
  • taste for anterior 2/3 tongue
53
Q

Name the two parts that make up the zygomatic arch

A
  • zygomatic process of temporal bone
  • temporal process of zygomatic bone

Anatomy Final (14 decks)

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