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PterygoPalatine Fossa
Brief Description
BonyLandmarks
Foramina
Content
Table of Contents
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•
Brief Description
Shape: inverted cone
Location: lateral to the nasal cavity, anterior inferior
to the middle cranial fossa, inferior to the apex of the
orbit and medial to the infratemporal fossa.
Communication: It communicates with the orbit,
middle cranial fossa, nasal cavity, nasopharynx, oral
cavity and infratemporal fossa by means of two
fissures, two foramina and three canals.
Content : Maxillary nerve V2, the pterygopalatine
ganglion and the third part of the Maxillary artery.
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Bony landmarks (boundaries).
Posterior:
- root of the pterygoid plates- inferior surface of the greater
wing of the sphenoid bone
Anterior: - posterior surface of the maxilla
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Superior:- posterior part of the inferior orbital fissure
- orbital process of the palatine bone-body of the sphenoid bone
Inferior:-apex leading in to the pterygopalatine canal
Medial:
- perpendicular plate of the palatine boneLateral:
- location of the pterygomaxillary fissure
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Foramina of Posterior WallVidian canal - connection to the middle cranial fossa on
the anterior side of the foramen lacerum
Contents: Vidian nerve formed by greater superficial
petrosal nerve and deep petrosal
Foramen rotundum- connection to the middle cranialfossa.
Contents: Maxillary nerve V2
Pharyngeal canal- connection to the nasopharynx.Contents: pharyngeal nerve (a branch of V2, coming off
the pterygopalatine ganglion) and pharyngeal artery (a
branch of the third part of the maxillary artery).
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Foramina in the superior wall
Spheno-palatine foramen-connection to the nasal cavityContents: sphenopalatine (also known as nasopalatine)
nerve and sphenopalatine artery
Foramina on the anterior wall
Inferior orbital fissure-connection with the orbit.
Contents: infraorbital nerve (a branch of V2), infraorbital
artery
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Inferiorly pterygopalatine fossacontinues into a canal:
pterygopalatine canal -connection with the roof of the oral cavity. Pterygopalatine canal leads to the
greater and lesser palatine foramina.
Contents: descending palatine nerve ,descendingpalatine
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Laterally pterygopalatine fossa opens up
in to the infratemporal fossa through the
pterygo-maxillary fissure
Contents: maxillary artery enters
pterygopalatine fossa via Pterygo-maxillary
fissure. Posterior superior alveolar artery leaves
the maxillary artery in the pterygo-palatine
fossa but turns around and comes back out of the fossa via pterygo-maxillary fissure to enter
its foramen on the tuberosity of the maxilla.
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Resources
http://www.flashcardmachine.com/anatomy-of-pterygopalatinefossa.html
http://quizlet.com/2070849/pterygopalatine-fossa-flash-cards/
http://www.gla.ac.uk/ibls/US/cal/anatomy/paranasal/pterygopalatinefossa.html
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THANK YOU