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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
Origin of lateral pterygoin
superior: infratemporal surface of the greater wing of sphenoid inferior: lateral surface of lateral pterygoid plate
26
insertion of lateral pterygoid m.
superior: articular disc and capsule of TMJ inferior: pterygoid fovea and capsule of TMJ
27
action of lateral pterygoid m.
protrude mandible and depress chin
28
side to side movements of the anterior mandible can be produced by unilateral use of muscles. Defind ipsilateral and contralateral excursion
ipsilateral excursion: retraction done on same side of muscle contralateral excursion: protrusion done on opposite side of muscle
29
identify
Superficial and deep head of medial pterygoid muscle
30
origin of medial pterygoid muscle
superior head: maxillary tuberosity Deep head: medial surface of lateral pteryoid
31
Insertion of medial pterygoid m.
same for both superior and deep heads: medial surface of ramus of mandible
32
innervation and action of medial pterygoid m.
N: Mandibular n. (CN V3) A: elevate and protrude mandible
33
Depression of the mandible is done by which 3 muscles
* gravity * suprahyoid muscle * infrahyoid muscle * lateral pterygoid
34
Elevation of the mandible is done via which 3 muscles
* temporalis * masseter * medial pterygoid
35
Protrusion of mandible is done by which 3 muscles
* lateral pterygoid * superficial masseter * medial pterygoid
36
retraction of mandible is done by which muscles
* temporalis posterior fibers (prime) * anterior belly of digastric
37
What artery is a branch off of the external carotid artery and can lie superfial or deep to the lateral pterygoid muscle?
maxillary artery
38
The maxillary artery can be split into 3 sections based on the position to what muscle?
Lateral pterygoid m.
39
The 1st (mandibular) part of the maxillary artery lies lateral/posterior to lateral pterygoid. Give the two main branches off of this section
* middle meningeal: passes through foramen spinosum * inferior alveolar artery: passes through mandibbular foramen
40
The auricotemporal nerve is split by what artery?
middle meningeal artery
41
Name the branches off of the 2nd (pterygoid) part of the maxillary artery that lies superficial/deep to lateral pterygoid m.
muscular branches * temporalis * pterygoids * masseter * buccinator
42
The maxillary vein connects to what venous plexus that lies in the infratemporal fossa
pterygoid plexus of veins
43
What nerve enters the infratemporal fosaa through the foramen ovale and carries both motor and sensory brances
mandibular nerve (CN V3)
44
The auriculotemporal nerve is a branch off of what nerve?
mandibular nerve (CN V3)
45
The auricotemporal nerve supplies what type of innervation
* sensory to TMJ * parasympathetic postganglionics to parotid gland
46
What is the otic ganglion?
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
The inferior alveolar nerve is a branch off of what main nerve? What are its distinguishing features
* mandibular n. (CN V3) * enters mandibular forman and passes through mandibular canal * sensory
48
Mental nerve is a branch off of what nrve. What is its distinguishing feature? What type of innervation does it supply?
* inferior alveolar n. * exits mental foramen * sensory
49
The nerve to mylohyoid is a branch off of what nerve? What type of innervation does it supply
* inferior alveolar n. * motor innervation to mylohyoid and anterior belly of digastric
50
The ligual nerve is a branch off of what nerve? What type of innervation does it suppy
* branch of mandibular n. (CN V3): anterior to inferior alveolar n. * sensory * joined by chorda tempani n. (From CN VII)
51
Chorda tympani. Where does it come from? What nerve does it join?
* branch of facial nerve (CN VII) * joins lingual nerve to provide taste sensory to tongue
52
What type of innervation does chora tympani provide and to what structure
* preganglionic parasympathetics destined for submandibular ganglion * taste for anterior 2/3 tongue
53
Name the two parts that make up the zygomatic arch
* zygomatic process of temporal bone * temporal process of zygomatic bone

Anatomy Final (14 decks)

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