Pterygopalatine Fossa Flashcards
What are the boundaries of the PP fossa?
Posterior: sphenoid
Anterior: maxilla
Medial: palatine bone
Lateral: infratemporal fossa (pterygo(spheno) maxillary fissure)
What are ways of communication of the PP fossa?
Middle cranial fossa, nasal cavity, orbit, nasopharynx, oral cavity, infratemporal fossa
How do we communicate with the nasal cavity of the PP fossa?
Sphenopalatine foramen
What are other areas of PP fossa communication?
Inferior orbital fissure, pterygomaxillary fissure, foramen rotundum, pterygoid canal, palatovaginal canal, palatine canal
What fossa communicates with the PP fossa directly?
Middle cranial fossa
Where is the PPG fossa?
Posterior to the maxillary bone
What are the branches of the maxillary nerve?
Zygomaticofacial nerve, infraorbital nerve, zygomaticotemporal nerve, pharyngeal nerve, greater & lesser palatine nn., superior alveolar nn
What axons come from deep petrosal nerve?
GVE
What axons come from greater petrosal nerve?
GVE, GVA
Nerve of pterygoid canal consist of…
Post-ganglionic synaptic GVEs, pre-ganglionic GVEs, and parasympathetics, and sensation (GVA)
What hitchhikes on all branches of maxillary nerve?
GVE fibers
What is the final destination of the zygomaticotemporal nerve?
Postganglionic GVE fibers to the lacrimal gland
What ganglion is exhibiting dysfunction when eye is red, dry, and painful?
PPG
The nasal nerve supplies…
Medial and lateral walls of the nasal cavity via the posterior superior and inferior lateral nasal nerves, and the nasopalatine nerve
What does the nasopalatine nerve innervate?
Nasal cavity, then passes into oral cavity through the incisive canal
What forms the superior dental plexus?
Superior alvelolar nerve
What are the terminal branches of the maxillary artery?
Infraorbital artery, sphenopalatine artery, and descending palatine artery
What does the descending palatine artery run with?
Greater and lesser petrosal nerve
What is the venous drainage of PP fossa?
Facial vein and infraorbital vein via pterygoid plexus
Where are sensory cell bodies during a sphenopalatine release?
Geniculate + trigeminal
When is a PPG block done?
Diagnose the cause of pain in the face and head
Manage the pain of certain types of chronic/cluster headaches
Manage sympathetically maintained facial pain
What vessel is most at risk during a PPG block?
Spehnopalatine artery
