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Neuroscience I Exam #1 > Infratemporal Fossa and Pterygopalatine Fossa > Flashcards

Infratemporal Fossa and Pterygopalatine Fossa Flashcards

1
Q

Boundaries of Infratemporal fossa

A 
Lateral: ramus of mandible
Anterior: maxilla
Medial: lateral pterygoid plate
Roof: sphenoid
Posterior: tympanic plate and mastoid/styloid processes
Inferior: angle of mandible
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2
Q

What foramen should you associate with the infratemporal fossa?

A

Foramen ovale

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3
Q

Contents of the infratemporal fossa

A 
Inferior part of temporalis m.
Pterygoid ms.
Maxillary a. (mandibular and pterygoid parts)
Pterygoid venous plexus
Branches of V3
Chorda tympani n. (CN VII)
Otic ganglion
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4
Q

What muscle can obscure some of the structures in the infratemporal fossa?

A

Lateral pterygoid m.

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5
Q

Arteries likely to be seen in the mandibular part of maxillary a.?

A

Middle meningeal a.

Inferior alveolar a.

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6
Q

What are branches from pterygoid part of maxillary a.?

A

Deep temporal a.
Pterygoid branches
Masseteric a.
Buccal a.

Must see these as. go into ms.

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7
Q

Explain buccal n. (CN V) vs. buccal branch

A

Buccal n. is sensory to the buccinator area, while buccal branch of facial n. is motor to buccinator m.

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8
Q

Branches of V3

A

Buccal n.
Lingual n.
Inferior alveolar n.
Auriculotemporal n.

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9
Q

What innervates tensor palatini m., tensor tympani m. and mylohyoid m.?

A

V3, mandibular n.

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10
Q

Which nerve splits around the MMA?

A

Auriculotemporal n.

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11
Q

Which 2 nerves communicate to travel to the lacrimal gland?

A

Zygomaticotemporal n. (V2) and lingual n. (V1)

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12
Q

Which nerves are blocked during dental procedures for the maxillary teeth?

A

Middle superior alveolar n. and anterior superior alveolar n. from intraorbital n. (V2).
Posterior superior alveolar n. (V2)

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13
Q

Structure in danger with fracture to neck of mandible

A

Maxillary a.

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14
Q

Structures in danger with fracture of ramus of mandible?

A

Inferior alveolar a./n.

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15
Q

Structures in danger with fracture of corpus of mandible?

A

Possibly the inferior alveolar structures, depending of the fx location.

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16
Q

Muscles of mastication

Innervation?

A

Temporalis m.
Masseter m.
Lateral pterygoid m.
Medial pterygoid m.

CN V (V3)

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17
Q

Ms. for elevation of mandible

A

Temporalis m.
Masseter m.
Medial pterygoid ms.

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18
Q

Ms. for depression of mandible

A

Lateral pterygoid ms.

Suprahyoid and infrahyoid ms.

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19
Q

Ms. for protrusion of mandible

A

Lateral pterygoid ms.
Medial pterygoid ms.
Masseter m.

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20
Q

Ms. for retrusion of mandible

A

Temporalis m.

Masseter m.

21
Q

Ms. for lateral movements of the mandible

A

Ipsilateral temporal m. and masseter m.

Contralateral pterygoid ms.

22
Q

Ls. of TMJ:

Function:

A

Stylomandibular l.
Sphenomandibular l.

Limit inferior movement of TMJ.

23
Q

What muscle inserts on the articular disk of the TMJ?

A

Lateral pterygoid m.

24
Q

When the jaw opens, what happens at the TMJ?

A

It disarticulates anteriorly after approx. 15 degrees.

25
Q

Nerve contributions to the TMJ

A

Mandibular n. (V3) –> auriculotemporal n., deep temporal n., and masseteric n.

26
Q

Where is an inferior alveolar nerve block performed?

A

Lateral to pterygomandibular raphe.

27
Q

Where is an infraorbital n. nerve block performed?

A

Between teeth and upper lip.

28
Q

What gives rise to the nasal septum? (3)

A

Perpendicular plate of ethmoid bone
Septal cartilage
Vomer

29
Q

Nasal concha vs. turbinates

A

Cochae are the bones themselves, while turbinates are bones covered in mucosa.

30
Q

Superior and middle nasal concha are part of what bone?

A

Ethmoid bone

31
Q

Olfactory vs. respiratory areas of the nasal cavity

A

Olfactory is superior 1/3

Respiratory is inferior 2/3

32
Q

Boundaries of nasal cavity

A

Roof: frontal, ethmoid and sphenoid bones.
Floor: maxilla and palatine bone.
Medial wall: nasal septum.
Lateral wall: nasal conchae.

33
Q

What is the opening of sphenoid sinus? Where?

A

Spheno-ethmoidal recess in superior concha.

34
Q

What is the opening of the ethmoid sinuses? Where?

A

Superior nasal meatus, inferior to the superior concha.

35
Q

What is the opening to the frontal sinus? Where?

A

Middle nasal meatus, inferior to middle concha.

36
Q

What is the opening to maxillary sinus? Where?

A

Maxillary ostium, inferior to middle nasal concha.

37
Q

What is the opening for the nasolacrimal duct? Where?

A

Inferior nasal meatus, inferior to the inferior concha.

38
Q

Arterial supply to the nasal cavity

A

Maxillary a. –> sphenopalatine a., ethmoidal as., greater palatine a.
Facial a. –> superior labial a., lateral nasal a.

39
Q

Arterial supply and innervation of maxillary sinus

A

Superior alveolar a. and greater palatine a.

Superior alveolar n.

40
Q

Arterial supply and innervation of ethmoid sinus

A

Ethmoidal as. (from ophthalmic a.)

Nasociliary n. (V1)

41
Q

Arterial supply and innervation of sphenoid sinus

A

Posterior ethmoidal a.

Posterior ethmoidal n.

42
Q

Arterial supply and innervation of frontal sinus

A

Supraorbital a.

Supraorbital n. (V1)

43
Q

Superior opening of pterygopalatine fossa

A

Inferior orbital fissure

44
Q

Inferior opening of pterygopalatine fossa

A

Closed except for palatine foramen

45
Q

Opening between middle cranial fossa and PP fossa

A

Foramen rotundum

46
Q

Contents of PP fossa (3)

A

Maxillary n. (V2)
Pterygopalatine ganglion
3rd part of maxillary a.

47
Q

Arteries of PP fossa

A 
Descending palatine a.
Posterior-superior alveolar a.
Infraorbital a.
A. of pterygoid canal
Sphenopalatine a.
48
Q

Kiesselbach area

A

Where all 5 arteries supplying the nasal cavity anastomose. If cut, it can bleed profusely.

Neuroscience I Exam #1 (25 decks)

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