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Anatomy Module IV > Anatomical Regions: Infratemporal Fossa and Pterygopalatine Fossa > Flashcards

Anatomical Regions: Infratemporal Fossa and Pterygopalatine Fossa Flashcards

1
Q

Maxillary nerve block

A

only accessible point along the route of the maxillary nerve is where the nerve passes across the roof of the Pterygopalatine foosoa

  1. access through a high posterior, superior to the pterygopalatine fossa
  2. greater palatine approach –> greater palatine foramen is entered with a needle and then followed superiorly to where the canal meets the PPF
  3. Extraoral approach - needle passed through skin on the face, through the mandibular notch of the mandible and into the PPF
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2
Q

only access point of the maxillary artery for a maxillary nerve block

A

where the nerve passes across the roof of the ptergopalatine fossa

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3
Q

infratemporal fossa

- general

A

an irregularly shaped space deep and inferior to the zygomatic arch, deep to the ramus of the mandible, and posterior to the maxilla
it communicates with the temporal fossa through the interval between (deep to) the zygomatic arch and (superficial to) the cranial bones

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4
Q

boundaries to the infratemporal fossa - general

A 
lateral 
medial 
anterior 
posterior
superior
inferior
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5
Q

lateral border of the infratemporal fossa

A

ramus of the mandible

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6
Q

medial border of the infratemporal fossa

A

LATERAL pterygoid plate (vertical projections coming down from the sphenoid bone)

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7
Q

anterior border of infratemporal fossa

A

posterior aspect of the maxilla

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8
Q

posterior border of the infratemporal fossa

A

tympanic plate and the mastoid and sytloid processes of the temporal bone

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9
Q

superior border of the infratemporal fossa

A

inferior (infratemporal) surface of the greater wing of the sphenoid bone

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10
Q

inferior border of the infratemporal fossa

A

where the medial pterygoid muscle attaches to the mandible near its angle - the medial pterygoid muscle is on the internal surface of the mandible

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11
Q

lateral access into the ITF and what travels here

A

ramus of the mandible through the mandibular foramen –> inferior alveolar nerve

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12
Q

medial access into the ITF and what travels

A

lateral pterygoid plate –> pterygomaxillary fissure –> maxillary artery

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13
Q

anterior access into ITF and what travels

A

posterior aspect of maxilla and the alveolar foramen –> posterior superior alveolar nerve

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14
Q

posterior access to ITF and what travels

A

Tympanic plate and styloid and mastoid processes of the temporal bone
THERE IS NO DIRECT ACCESS FROM THE POSTERIOR BOUNDARY - so nothing travels

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15
Q

T/F there is no direct access from the posterior aspect of the ITF

A

TRUE

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16
Q

superior access to ITF and what travels

A

inferior (infratemporal) surface of the greater wing of the sphenoid bone
foramen spinosum–> middle meningeal artery
foramen ovale –> V3
Petrotympanic fissure –> chorda tympani

17
Q

inferior access to the ITF and what travels

A

where the medial pterygoid muscle attaches to the mandible near its angle
NO DIRECT ACCESS - so nothing travels

18
Q

T/F there is no direct access from the inferior aspect of the ITF

A

TRUE

19
Q

muscles associated with ITF

A

inferior part of the temporalis muscle

lateral and medial pterygoid muscles

20
Q

vessels associated with the ITF

A

maxillary artery - first and second divisions

Pterygoid venous plexus

21
Q

nerve structures associated with ITF

A

Mandibular nerve and branches
Branches of two CN to join the mandibular nerve in ITF
- CN IX (glossopharyngeal)- lesser petrosal
- CN VII - chorda tympani
Otic ganglion – whih will pass to the parotid gland

22
Q

location and shape of Pterygopalatine fossa

A

deep to the infratemporal fossa and an inverted tear drop space
DEEP AND MEDIAL TO INFRATEMPORAL FOSSA

23
Q

Lateral border of PPF

A

the pterygomaxillary fissure - which is the MEDAIL BORDER of the ITF (lateral pterygoid plate)

24
Q

anterior border of PPF

A

posterior surface of maxilla (same as ITF)

25
Q

Medial border of PPF

A

Vertical plate of palatine bone - which forms part of lateral wall of nasal cavity

26
Q

posterior border of PPF

A

pterygoid process of sphenoid bone

27
Q

superior border of PPF

A

portion of greater wing of the sphenoid bone

28
Q

inferior border of PPF

A

pyramidal process of palatine bone

29
Q

vessels associated with PPF

A

terminal - 3rd or pterygopalatine part of the maxillary artery and the initial parts of its branches

30
Q

nerves associated with PPF

A

maxillary nerve and branches
nerve to pterygoid canal
pterygopalatine ganglion

31
Q

How many gateways does the PPF have?

A

Seven

32
Q

Pterygomaxillary fissure

A

lateral of PPF and medial of ITF –> so leads to the ITF from the PPF

33
Q

Inferior orbital fissure

A

gateway/ opening within the PPF –> between the sphenoid and maxilla –> into orbit

34
Q

sphenopalatine foramen

A

gateway to PPF in palatine bone –> to nasal cavity

35
Q

Palatovaginal canal

A

gateway in PPF in sphenoid bone –> to nasopharynx

36
Q

foramen rotundum

A

Gateway in PPF - in sphenoid bone –> to middle cranial fossa

37
Q

Pterygoid (vidian) canal

A

gateway in PPF

in sphenoid bone –> middle cranail fossa

38
Q

Greater palatine canal

A

gateway in PPF

in paltine bone –> to oral cavity

Anatomy Module IV (12 decks)

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