Unit 4 - Head and Neck: Pterygopalatine Fossa (Ex. III) Flashcards Preview

Gross Anatomy '15 Ex. III > Unit 4 - Head and Neck: Pterygopalatine Fossa (Ex. III) > Flashcards

Flashcards in Unit 4 - Head and Neck: Pterygopalatine Fossa (Ex. III) Deck (14)
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1

What is it?

distribution center for branches of maxillary division of trigeminal n. (CN V2) and branches of maxillary a.

2

S boundary

apex of orbit

3

A boundary

maxillary sinus

4

P

L pterygoid plate of sphenoid

5

L boundary

pterygoaxillary fissure

6

M boundary

vertical plate of palatine bone

7

contents

pterygopalatine part of maxillary a., branches, and vv.
n. of pterygoid canal
pterygopalatine ganglion
maxillary division of trigeminal n. (CN V2) and branches

8

With what does it communicate?

A --> orbit
M --> nasal cavity and palate
P --> middle cranial fossa and base of skull

9

What is the pterygomaxillary fissure?

allows the maxillary a. to pass from the infratemporal fossa to the pterygopalatine fossa

10

What do the branches of the maxillary a. supply?

nose
palate
pharynx

**accompany branches of maxillary n. (CN V2)**

11

What is the nerve of the pterygoid canal?

enters pterygopalatine fossa from middle cranial fossa
autonomic n.
carries:
- preganglionic PARASYMP from greater petrosal n. (branch of facial n. (CN VII))
- postganglionic SYMP from deep petrosal n. (arises from internal carotid plexus)

12

pterygopalatine ganglion

receives general sensory fibers from maxillary n. (CN V2) and PARASYMP and SYMP fibers from n. of pterygoid canal
PARASYMP fibers synapse in ganglion - general sensory and SYMP fibers pass through ganglion but do not synapse

13

maxillary division (CN V2) of trigeminal n. (CN VII)

from middle cranial fossa --> pterygopalatine fossa via FORAMEN ROTUNDUM
suspends pterygopalatine ganglion via 2 small ganglionic nn. - transmit general sensory fibers of maxillary n.
distributes postganglionic PARASYMP (secretomotor) and SYMP (vasoconstrictive) fibers to lacrimal, nasal, palatial, and pharyngeal glands
distributes general sensory fibers to midface, maxillary sinus, maxillary teeth, nasal cavity, palate, and S pharynx

14

location

M to infratemporal fossa

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