Infratemporal Fossa

Question 1

Temporal fossa formed by

Answer 1

• Frontal process of zygo bone
• Zygo process of frontal bone
• Superior temporal line
• Zygomatic arch

Question 2

Temporal fossa filled with

Answer 2

teporalis muscle

Question 3

what is the space below temporal fossa

Answer 3

infratemporal fossa

Question 4

what borders does the zygomatic arch form?

Answer 4

zygo arch is inferior border of tepmoral fossa and superior border of infratemporal fosaa

Question 5

roof of infratemporal fossa?

Answer 5

1) infratemporal surface of greater winger of sphenoid (deepest)
2) infratemporal cest of greater wing od sphenoid bone
3) zygomatic arch (most lateral/superficial)

Question 6

why doesn’t the infratemporal fossa have an inferior boundary?

Answer 6

contents are all soft tissues, no bone

Question 7

infratemporal fossa is bounded by

Answer 7

• superiorly by zygomatic arch
• laterally by ramus of mandible (fossa is deep to ramus)
• superiorly by infratemporal crest and infratemporal surface of greater wing of sphenoid; zygomatic arch
• anteriorly by infratemporal surface of maxilla
• medially by lateral pterygoid plate of sphenoid
• posterior by mandibular fossa and styoloid/mastoid processes

Question 8

infratemporal contains?

Answer 8

1) V3 (chorda tympani of facial nerve, bracnhes of V2, otic ganglion, lesser petrosal n)
2) muscles of mastication
3) maxillary artery and vein
4) ptygoud plexus

Question 9

internal oblique ridge of mandible is important for?

Answer 9

• -intra-oral injections= acts as landmark for inferior alveolar nerve block
• -insertion point for temporalis muscle

Question 10

otic ganglion is found?

Answer 10

in infratemporal fossa

Question 11

lingual nerve carries? picks up?

Answer 11

• carries sensation from the flood of mouth and general sensation from anterior 2/3
• picks up chorda tympani from CN7, which carries both para and taste to ant 2/3

Question 12

posterior superior alveolar nerve

Answer 12

innervate maxillary teeth

*from V2

Question 13

Otic Ganglion and lesser petrosal nerve

Answer 13

1) Lesser petrosal carries pre-syn parasym from CN9
2) Go to otic ganglian which is in infratemporal fossa
3) Synapses occurs
4) From the otic ganglia, the POST-syn para hitch a ride on V3 on auricular temporal nerve to get to parotid gland

Question 14

Otic Ganglion houses the cells of?

Answer 14

parasympathetic innervation to parotid gland, originating from CN9

Question 15

Frey’s syndrome

Answer 15

 Typically result of a parotidctomy for a benign tumor of parotid gland; you cannot avoid severing innervation
 Auricular temporal nerves that was causing para secretion from gland NOW innervate the skin and causes sweating when you eat
 Sweating is the characterized sign