What is ENT - Describe the pterygopalatine fossa.
The pterygopalatine fossa is the space below the apex of the orbit. Boundaries of the Pterygopalatine Fossa • Anterior: Maxilla • Posterior: Pterygoid plates of the sphenoid bone • Superior: Medial half of the inferior orbital fissure • Inferior: Upper end of the palatine canal • Lateral: Pterygomaxillary fissure • Medial: Sphenopalatine foramen and perpendicular plate of the palatine bone Communications of the Pterygopalatine Fossa • Anterior: Maxillary sinus (no direct communication) • Superior: Orbital cavity through the inferior orbital fissure • Posterior: Middle cranial fossa through foramen rotundum and the pterygoid canal • Inferior: Oral cavity through the palatine canal • Lateral: Infratemporal fossa through the pterygomaxillary fissure • Medial: Nasal cavity through the sphenopalatine foramen Contents of the Pterygopalatine Fossa • Fat • Maxillary artery • Maxillary division of the trigeminal nerve • Pterygopalatine ganglion: Parasympathetic ganglion where postganglionic nerves innervate the lacrimal gland and nasal mucosa.
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