pterygopalatineganglion<br />“The largest parasympathetic ganglion in the head & neck”<br />
Site :<br />It lies in the pterygopalatine fossa<br />pterygopalatine<br />ganglion<br />
PTERYGOPALATINE FOSSA<br />It is a very important neurovascular junction of the deep face .<br />
Lateral :<br />the pterygomaxillary fissure <br />Anterior :<br />Superomedial part of the infratemporal surface of the maxilla <br />Posterior : <br /> root of the pterygoid process & adjoining anterior surface of the greater wing of sphenoid bone<br />
Inferior :<br /> part of the floor is formed by the pyramidal process of the palatine bone. <br />
Medial :<br /> perpendicular plate of the palatine bone <br />
Pterygopalatine <br />Ganglion<br />Maxillarynerve<br />Sensory roots<br />Greater superficial petrosal<br />(parasympathetic)<br />Deep petrosal<br />(sympathetic)<br />Autonomic root<br />(Nerve to pterygoid canal)<br />(Vidian Nerve)<br />N.B.<br /> The sympathetic and parasympathetic roots reach the ganglion through the nerve of the pterygoid canal which is formed by the union of deep petrosal nerve (sympathetic) & greater superificalpetrosal nerve (parasympathetic) <br />
Greater palatine<br />Descends through the greater palatine canal.<br />Comes out throughthe greater palatine foramen.<br />Supplies the mucous membrane of the hard palate.<br />
Lesser palatine<br />Descends through the greater palatine canal.<br />Comes out through the lesser palatine foramen.<br />Supplies the mucous membrane of the soft palate,uvula,tonsils.<br />
<ul><li>Runs through the sphenopalatineformen to reach the nasal septum.
Then runs through the incisive canal to come out the median incisive foramen.
Supplies the nasal septum and the gum of the incisors.</li></ul>Nasopalatine<br />(Long sphenopalatine)<br />Nasopalatine<br />(Long sphenopalatine)<br />
Posterior superior<br />lateral nasal<br />(short sphenopalatine)<br /><ul><li>Runs through the sphenopalatine to reach the nasal septum.
Supplies the upper posterior part of the lateral wall of the nose.</li></li></ul><li>Orbital branch<br />Runs through the inferior orbital fissure.<br />Supplies the orbital periosteum.<br />
Pharyngeal branch<br /><ul><li>Runs through the palatovaginal canal.
Brain Freeze or ice cream headache are terms used to describe a form of cranial pain or headache which human beings are known to sometimes experience after consuming cold beverages or foods such as ice cream, often as a result of rapid consumption.<br />Cause :<br />The reaction is triggered by the cold substance consumed coming into contact with the roof of the mouth. It triggers nerves (sphenopalatine ganglia) that give the brain the impression of a very cold environment. To return warmth to the brain, blood vessels start to swell, which causes the pain for, typically, around 30 seconds.<br />How to avoid ?<br />The pain may be avoided in the first place simply by eating your ice cream (or other cold food or drink) more slowly. <br />
Team work <br />Omar Eraky<br />Omar salah<br />Demonstrator<br />Dr. Reham El-Saeed<br />Supervisor<br />Prof.Dr. Dalia Saleh<br />Head of department <br />Prof.Dr. hudaM.El-Tahry<br />THANK YOU !<br />