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Anatomy of pterygopalatine fossa
UAB
22
Anatomy
Professional
03/15/2010

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Term
What are the boundaries of the pterygopalatine fossa?
Definition
  • Anterior: posterior surface of maxilla
  • posterior: lateral pterygoid plate
  • medial: perpendicular plate of the palatine
Term
Through what fissure does the pterygopalatine fossa communicate with the infratemoporal fossa?
Definition
pterygomaxillary fissure
Term
Through what fissure does the pterygopalatine fossa communicate with the orbit?
Definition
  1. inferior orbital fissure
Term
Through what fissure does the pterygopalatine fossa communicate with the nasal cavity?
Definition
  • Sphenopalatine foramen
Term
Through what fissure does the pterygopalatine fossa communicate with the palate?
Definition
  • greater and lesser palatine canals and foramina
Term
Through what fissure does the pterygopalatine fossa communicate with the middle crainal fossa?
Definition
  • foramen rotundum
Term
Through what fissure does the pterygopalatine fossa communicate with the pterygoid canal?
Definition
  • foramen lacerum
Term
What is the entrance and exit for V2 in the pterygopalatine fossa?
Definition
  • enters: foramen rotundum
  • exits: inferior orbital fissure to become infraorbital nerve
Term
name the branches of V2
Definition
  1. Zygomatic n.
  2. infraorbital n.

  3. posterior superior alveolar n.
  4. pterygopalatine n.
Term

Infraorbital nerve

 

Definition
  • terminal part of maxillary n. before reaching the infraorbital foramen to supply skin of face, it gives off the middle & superior alveolar nerve to the maxillary premolars and the anterior & superior alveolar nerve to teh maxillary incisors and the canine which run within the bone of the all of the maxillary sinus and also supply the mucous membrane of the sinus
Term
Zygomatic n.
Definition
enters via orbit to pterygopalatine fossa and splits into the zygomaticotemporal and zygomaticofacial nerves which are cutaneous to the temple and face
Term
posterior superior alveolar nerve
Definition
  • arises directly from V2 enters pterygopalatine fossa via posterior superior alveolar formina to supply maxillary molars and mucosa of the maxillary sinus
Term
pterygopalatine n
Definition
  • connect V2 with pterygopalatine ganglion
  • Mainly GSA of V2
  • Doesn't synapse in ganglion
  • distributed to the pharynx, palate and nasal cavity
Term

pharyngeal branch of V2

 

Definition
  • sensory to the roof of the pharnyx
Term
Greater palatine n
Definition
sensory to the hard palate
Term
lesser palatine n
Definition
sensory to the soft palate
Term
Nasal Branches of V2
Definition
ubiquitous in the nose
Term
nasopalatine n branch of V2
Definition
  • sensory to the septum of nasal cavity
Term
Structures supplied by them that synapse in the pterygopalatine ganglion
Definition
  1. Lacrimal gland
  2. roof of the nasopharynx
  3. palate
  4. nasal cavity (secretomotor)
Term
What non-parasympathetic run, but do NOT synapse in the pterygopalatine ganglion?
Definition
  • GSA from V2
  • Sympathetic fibers in deep petrosal n. (CN7)
Term
Branches of the maxillary artery
Definition
  1. infraorbital artery = floor of the orbit to give off superior alveolar artery to the premolars and the anterior superior alveolar artery to the incisors and canine
  2. Posterior superior alveolar artery = supplies molar teeth
  3. descending palatine artery= splits into the greater and lesser palatine artery to supply hard and soft palate respectively
  4. sphenopalatine artery = passes through the sphenopalatine foramen to supply the nasal cavity
Term
Random fact: 2nd part of the maxillary artery passes through WHAT opening to enter the pterygopalatine fossa?
Definition
pterygomaxillary fissure
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