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BMS > PP Fossa > Flashcards

PP Fossa Flashcards

1
Q

What is the roof/superior border of the PP Fossa?

A

Undersurface of the sphenoid bone and orbital process of the palatine bone

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2
Q

What is the posterior border of the PP Fossa?

A

base of the pterygoid process and inferior portion of the sphenoid

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3
Q

What is the lateral border/wall of the PP Fossa?

A

Pterygomaxillary fissure separates it from the infratemporal fossa

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4
Q

What is the floor/inferior border of the PP Fossa?

A

Descending palatine canal through horizontal plate of the palatine bone

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5
Q

What is the anterior border of the PP Fossa?

A

Posterior wall of the maxilla

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6
Q

What is the medial border of the PP Fossa?

A

Perpendicular plate of the palatine bone, which separates it from the nasal cavity

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7
Q

What openings are on the roof of the PP Fossa?

A

The Inferior Orbital Fissure

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8
Q

What openings are on the posterior side of the PP Fossa?

A

Foramen rotundum (most lateral, communicating with medial cranial fossa), Pterygoid canal (middle), and Pharyngeal canal (most medial, communicating with nasopharynx)

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9
Q

What openings are on the lateral side of the PP Fossa?

A

The Pterygomaxillary Fissure communicating with the Infratemporal Fossa

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10
Q

What openings are on the floor of the PP Fossa?

A

The Descending Palatine Canal communicating with the oral cavity

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11
Q

What openings are on the medial side of the PP Fossa?

A

The sphenopalatine foramen communicating with the nasal cavity

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12
Q

What is the descending venous drainage of the PP Fossa?

A

Pterygoid plexus -> Maxillary veins -> Retromandibular veins -> into the internal jugular vein

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13
Q

What other regions does the pterygoid plexus drain?

A

the cavernous sinus, inferior opthalmic vein (orbit), nose, hard and soft palate, and middle cranial fossa. TEETH are also drained by Anterior, Middle, and Posterior Superior Alveolar Veins.

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14
Q

What composes the danger triangle region?

A

Pterygoid plexus and cavernous sinus

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15
Q

What does the inner carotid supply?

A

The brain

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16
Q

What does the outer carotid supply?

A

The face

17
Q

What are the branches of the external carotid?

A

Superior thyroid, ascending pharyngeal, lingual, facial, occiptal, Posterior Auricular, maxillary, superficial temporal

18
Q

What are the branches of the maxillary?

A

deep auricular, anterior tympanic, middle meningeal, inferior alveolar, accessory meningeal, medial and lateral pterygoid, deep temporal anterior and posterior, buccal, sphenopalatine, descending palatine, infraorbital, posterior superior alveolar, middle superior alveolar, pharyngeal, anterior superior alveolar, artery of pterygoid canal

19
Q

Where does the maxillary artery course?

A

Between mandible and sphenomandibular ligament, crossing the lateral pterygoid muscle, enters the PP fossa

20
Q

What are the five branches of the maxillary artery that pass through foramina?

A

Deep auricular, anterior tympanic, middle meningeal, accessory meningeal, inferior alveolar

21
Q

What feeds the external acoustic meatus and petrotympanic fissure?

A

Deep auricular and anterior typanic

22
Q

What supplies the external acoustic meatus?

A

Deep auricular

23
Q

What supplies the outer surface of tympanic membrane?

A

Anterior tympanic (and deep auricular)

24
Q

What do the middle and accessory meningeal arteries supply?

A

Meninges and dura mater

25
Q

What is the second set of the maxillary artery that supplies the muscles?

A

Masseteric, Pterygoid, Anterior and Posterior deep temporal, buccal

26
Q

What is the third set of the maxillary artery that goes through bony canals or foramina?

A

Artery of the pterygoid canal, sphenopalatine, infraorbital, posterior superior alveolar, descending palatine

27
Q

What does the sphenopalatine artery supply?

A

Nasal concha and septum (nosebleeds)

28
Q

What does the infraorbital artery supply?

A

muscles of the eye and the lacrimal gland

29
Q

What does the posterior superior alveolar artery supply?

A

maxillary sinus and maxillary molars

30
Q

What does the descending palatine artery supply?

A

Splits into greater and lesser palatine arteries that supply the hard and soft palate

31
Q

What major nerve enters the PP Fossa?

A

The V2

32
Q

What are the V2 branches from the PP Fossa?

A

Posterior, Middle, and Anterior Superior Alveolar nerves, greater and lesser palatine nerves, Nasopalatine nerve, Pharyngeal nerve, Posterior Inferior/superior lateral nerve, vidian nerve
the superior alveolars are all branches of infraorbital nerve

33
Q

What are the maxillary nerve blocks?

A

MSA (bicuspids and mesiobuccal cusp of 1st molar and premolars), ASA (anteriors), PSA (molars)

34
Q

What goes through the roof of the PP Fossa?

A

(Inferior orbital Fissure) has infraorbital artery and nerve (which branches off the zygomatic nerve as well)

35
Q

What lies inside the PP Fossa?

A

PP ganglion

36
Q

What goes through the lateral PP Fossa?

A

(Pterygomaxillary fissure)

maxillary artery and posterior superior alveolar nerve (exiting)

37
Q

What goes through the posterior of the PP Fossa?

A

PRPP of the PP
Foramen Rotundum: V2
Pterygoid Canal: Nerve and artery of the pterygoid
Most medial is the Pharyngeal canal which has nerve and artery of pharyngeal canal

38
Q

What goes through the floor of the PP Fossa?

A

(Palatine canal)

Descending palatine artery, greater and lesser palatine artery/nerves

39
Q

What goes through the medial wall?

A

(sphenopalatine foramen)

Sphenopalatine artery, nasopalatine nerve, posterior superior nasal nerve

BMS (7 decks)

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