Show pageOld revisionsBacklinksBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ====== PTERYGOPALATINE FOSSA ====== * Pterygopalatine fossa * Boundaries * Anterior * Superomedial part of posterior surface of maxilla * Posterior * Root of pterygoid process and adjoining part of anterior surface of greater wing of sphenoid * Medial * Upper part of perpendicular plate of palatine bone * Orbital and sphenoidal process of bone * Lateral * Fossa opens in to infratemporal fossa through pterygomaxillary fissure * Superior * Undersurface of body of sphenoid * Inferior * Closed by pyramidal process of palatine bone in angle between maxilla and pterygoid process * Communications * Anteriorly * With orbit * Through medial end of inferior orbital fissure * Posteriorly * Middle cranial fossa * Foramen rotundum * Pterygoid canal * Foramen lacerum * Pharynx * Palatovaginal canal * Medially * Nose * Sphenopalatine foramen * Laterally * Infratemporal fossa through * Pterygomaxillary fissure * Inferiorly * Oral cavity * Through greater and lesser palatine canals * contents * Maxillary nerve * Pterygopalatine ganglion * Features * Largest parasympathetic peripheral ganglion * Roots * Parasympathetic root * Nerve of pterygoid canal * Carries preganglionic fibres * Arise from superior salivatory and lacrimatory nuclei * Pass through * Post ganglionic fibers * Supply secretomotor fibers to lacrimal gland * Mucous glands of nose , paranasal sinuses * Nasopharynx and palate * Sympathetic root * Nerve of pterygoid canal * Postganglionic sympathetic fibers * Arising from superior cervical sympathetic ganglion * Pass through internal carotid plexus , deep petrosal nerve and nerve of pterygoid canal * To reach PTG * Pass through ganglion without relay * SENSORY ROOT * come from maxillary nerve * Pass through ganglion without relay * BRANCHES * orbital branches * Palatine branches - greater or anterior palatine nerve * Lesser or middle and posterior palatine nerves * Nasal branches * Lateral posterior superior nasal branches * Medial posterior superior nasal branches {{:anatomy:trigeminal_ganglion.png}} {{:anatomy:pteryg.png}} {{:anatomy:pterygopalatine_fossa_above.png}} {{:anatomy:pterygopalatine-fossa.png}} en/pterygopalatine-fossa.txt Last modified: 2023/06/18 11:24by 127.0.0.1