The otic ganglion is a parasympathetic ganglion located in the infratemporal fossa just below the foramen ovale. It is oval shaped and reddish grey in color. It has connections to the mandibular nerve, glossopharyngeal nerve, and middle meningeal artery. The otic ganglion plays a role in parasympathetic innervation of lacrimal and salivary glands as well as sympathetic innervation of the parotid gland. Damage to the auricotemporal nerve can cause Frey's syndrome, where facial sweating is induced by eating.